Shearwater Teric Operating Instructions Manual

Table of Contents ����������������������������������������������������������2 Conventions Used in this Manual ����������������������������������������������� 4 1. Introduction .....................................................5 1�1� Notes on this manual ���������������������������������������������������������������� 6 1�2� Modes Covered by this Manual �������������������������������������������� 6 2. Basic Operation ..............................................7 2�1� Turning On ������������������������������������������������������������������������������������7 2�2� Buttons ����������������������������������������������������������������������������������������� 8 2�3� Changing between Modes ���������������������������������������������������� 9 2�4� Owner Information Screen ��������������������������������������������������� 9 2�5� Function Button������������������������������������������������������������������������ 9 3. Dive Mode Interface.....................................10 3�1� Default Dive Setup �������������������������������������������������������������������10 3�2� Dive Mode Differentiation ����������������������������������������������������10 3�3� Main Screen Layout �����������������������������������������������������������������11 3�4� Detailed Descriptions ������������������������������������������������������������12 3�5� Info Screens�������������������������������������������������������������������������������16 3�6� Info Screen Descriptions ������������������������������������������������������17 3�7� Home Screen Customization ����������������������������������������������21 3�8� Alerts ������������������������������������������������������������������������������������������22 4. Safety and Decompression Stops ............ 24 4�1� Safety Stops ������������������������������������������������������������������������������24 4�2� Decompression Stops ����������������������������������������������������������25 5. Decompression and Gradient Factors ..... 26 5�1� Decompression Information Accuracy ��������������������������� 27 6. Example Dives ............................................. 28 6�1� OC Rec Example Dive �����������������������������������������������������������28 6�2� OC Tec Example Dive �����������������������������������������������������������29 OC Tec Example Dive (cont�)�����������������������������������������������������30 6�3� CC Example Dive ��������������������������������������������������������������������31 CC Example Dive (cont�) �������������������������������������������������������������32 CC Example Dive (cont�) �������������������������������������������������������������33 6�4� Gauge Mode ����������������������������������������������������������������������������34 7. Freedive Mode ............................................. 35 7�1� Default Freediving Layout ����������������������������������������������������35 7�2� Freediving Info Screens �������������������������������������������������������36 7�3� Freediving Sets �����������������������������������������������������������������������36 8. Dive Tools ..................................................... 38 8�1� Compass �������������������������������������������������������������������������������������38 8�2� Tag Log ������������������������������������������������������������������������������������� 40 8�3� Reset Average Depth ���������������������������������������������������������� 40 8�4� Test Alert ���������������������������������������������������������������������������������� 40 8�5� Deco Planner ����������������������������������������������������������������������������41 8�6� NDL Planner �����������������������������������������������������������������������������43 9. Air Integration (AI) .....................................44 9�1� What is AI? ��������������������������������������������������������������������������������44 9�2� Basic AI Setup �������������������������������������������������������������������������45 9�3� AI Displays ��������������������������������������������������������������������������������48 9�4� Using Multiple Transmitters �����������������������������������������������50 9�5� SAC calculations ����������������������������������������������������������������������51 9�6� GTR calculations ��������������������������������������������������������������������52 10. Watch Mode ............................................... 53 10�1� Date And Time ������������������������������������������������������������������������53 10�2� Watch Tools ����������������������������������������������������������������������������53 10�3� Watch Face Colors ���������������������������������������������������������������55 11. Menus ........................................................... 56 11�1� Main Menu ����������������������������������������������������������������������������������56 12. Settings Reference .................................... 63 12�1� Dive Settings Menu ���������������������������������������������������������������63 12�2� Deco Menu ������������������������������������������������������������������������������68 12�3� Gases �����������������������������������������������������������������������������������������69 12�4� Set Points ��������������������������������������������������������������������������������69 12�5� AI �������������������������������������������������������������������������������������������������70 12�6� Compass ����������������������������������������������������������������������������������71 12�7� Display ��������������������������������������������������������������������������������������� 72 12�8� Watch ���������������������������������������������������������������������������������������� 74 12�9� General ������������������������������������������������������������������������������������� 75 13. Firmware Update and Log Download .... 76 13�1� Shearwater Cloud Desktop ������������������������������������������������76 13�2� Shearwater Cloud Mobile ��������������������������������������������������78

15. Charging ..................................................... 79 16. Troubleshooting ......................................... 81 16�1� Warnings and Information Displays ��������������������������������81 16�2� AI Connection problems ����������������������������������������������������82 17. Storage and Maintenance ......................... 83 17�1� Transmitter Battery Replacement ������������������������������������83 18. Servicing ..................................................... 83 Glossary ............................................................ 83 Teric Specifications ........................................ 84 Teric Specifications (cont.) ........................... 84 AI Transmitter Specifications ....................... 85 FCC Warning ������������������������������������������������������������������������������������85

These conventions are used to highlight important information: INFORMATION Information boxes contain useful tips for getting the most out of your Teric. CAUTION Caution boxes contain important instructions on operating the Teric. WARNING Warning boxes contain critical information that may affect your personal safety. This computer has bugs. Although we haven’t found them all yet, they are there. It is certain that there are things that this computer does that either we didn’t think about, or planned for it to do something different. Never risk your life on only one source of information. Use a second computer or tables. If you choose to make riskier dives, obtain the proper training and work up to them slowly to gain experience. This computer will fail. It is not whether it will fail but when it will fail. Do not depend on it. Always have a plan on how to handle failures. Automatic systems are no substitute for knowledge and training. No technology will keep you alive. Knowledge, skill, and practiced procedures are your best defense (except for not doing the dive, of course). WARNING This computer is capable of calculating deco stop requirements. These calculations are at best a guess of the real physiological decompression requirements. Dives requiring staged decompression are substantially more risky than dives that stay well within no-stop limits. Diving with rebreathers and/or diving mixed gases and/or performing staged decompression dives and/or diving in overhead environments greatly increases the risk associated with of scuba diving. YOU REALLY ARE RISKING YOUR LIFE WITH THIS ACTIVITY. DANGER

• Rugged stainless steel bezel and sapphire crystal • Crush proof to 650ft /200m • 5 independently configurable diving modes • 2 customizable layouts for every dive mode • 5 customizable gases in every SCUBA mode • Any combination of Oxygen, Nitrogen and Helium (Air, Nitrox,Trimix) • Full decompression and CCR Support • Bühlmann ZHL-16C with gradient factors • No lockout for violating deco stops • CNS Tracking • Quick NDL and full decompression planner built in • Simultaneous wireless pressure monitoring of 1 or 2 cylinders • Tilt compensated digital compass with multiple display options • Dedicated Freedive mode • Customizable auditory and vibration alerts. • High-speed depth sampling • 3 watch faces available in 15 colors • Bluetooth Dive log uploading to Shearwater Cloud • Free firmware updates 1. Introduction The Shearwater Teric is an advanced dive computer for all types of diving. Please take the time to read this manual. Your safety may depend on your ability to read and understand the Teric displays. Diving involves risk and education is your best tool for managing this risk. Do not use this manual as a substitute for proper dive training and never dive beyond your training. What you don’t know can hurt you.

This manual provides operating instructions for the Teric in Watch Mode as well as five Dive modes: • Open Circuit Recreational (OC Rec) • Open Circuit Technical (OC Tec) • Closed Circuit / Bail Out (CC/BO) • Gauge • Freedive Some features of the Teric only apply to certain dive modes. Look for the corresponding mode icons throughout the manual to help distinguish which features are available in the various modes. If not otherwise indicated, features described are applicable in all dive modes. Change the Dive Mode from the Dive Settings menu. See details on page 63. 1.1. Notes on this manual This manual contains cross-references between sections to make it easier to navigate. Underlined text indicates the presence of a link to another section. Do not change any settings on your Teric without understanding the consequence of the change. If you are unsure, consult the appropriate section of the manual for reference. This manual is not a substitute for proper training. OC BO CC FD OC BO CC FD GA OC BO CC OC Tec OC Rec

2.1. Turning On To turn the Teric On, press any button. Auto-on The Teric will automatically turn-on and enter dive mode when submerged underwater. This is based on pressure increase and not on the presence of water. When auto-on is activated, the Teric will enter the last configured dive mode. Auto-on Details The Teric turns on automatically and enters dive mode when the absolute pressure is greater than 1100 millibar (mbar). For reference, normal sea level pressure is 1013 mbar and 1 mbar of pressure corresponds to approximately 1 cm (0.4”) of water. So, the Teric will automatically turn-on and enter dive mode when about 0.9 m (3 ft) underwater when at sea level. If at higher altitude, then the Teric auto-on will occur at a deeper depth. For example, when at 2000 m (6500 ft) altitude the atmospheric pressure is only about 800 mbar. Therefore, at this altitude the Teric must be submerged underwater by 300 mbar to reach an absolute pressure of 1100 mbar. This means the auto-on occurs at about 3 m (10 ft) underwater when at an altitude of 2000 m. Do Not Rely On The Auto-On Feature This feature is supplied as a backup for when you forget to turn on your Teric or forget to place it in dive mode. Shearwater recommends turning your computer on manually and entering dive mode before each dive to confirm proper operation and to double check battery status and setup.

Don’t worry about remembering all the button rules below. Button hints make using the Teric easy. MENU Button (Lower Left) From the main screen > Brings up the menu In a menu > Moves down to the next menu item INFO Button (Lower Right) From the main screen > Cycles through info screens In a menu > Exits back to the previous menu or main screen LIGHT button (Upper Left) From the main screen > Cycles brightness levels In a menu > Moves up to the next menu item FUNCTION Button (Upper Right) From the main screen > Configurable shortcut In a menu > Selects menu item FUNC (Upper Right) LIGHT (Upper Left) MENU (Lower Left) INFO (Lower Right) Button Hints When in a menu, button hints label each button: In the example above, the hints to the right tell us: • Use LIGHT to move up a menu item • Use MENU to move down a menu item • Use FUNC to select a menu item • Use INFO to go back to the home screen Button Hint Icons: Dive Watch Tools Gases ✘ Gases UP DOWN NEXT SELECT HOME CANCEL SAVE SELECT UP DOWN HOME PREVIOUS Deco Deco Model ZHL16C+GF GF Conserv. High 35/75 Last Stop 3 m BACK

The two primary modes are Watch mode and Dive mode. Watch mode is only available at the surface. Switching to Dive mode To change from watch mode to dive mode manually, press the Menu button and select Dive from the main menu. Dive mode will automatically be triggered when a dive starts. Changing dive modes is covered on page 63. Switching to Watch mode To change from Dive mode to Watch mode, press the Menu button and select Watch from the main menu. The Teric will revert back to watch mode after 15 minutes of inactivity on the surface. Dive Watch Tools 2.4. Owner Information Screen Upon entering dive mode, the owner information screen will be displayed for 15 seconds or until any button is pressed. Owner and contact information can be changed in the User Info menu (page 75) This display also confirms the current alert notification settings and tests the alerts. Alerts notification settings can be changed in the top-level Alerts menu. 2.5. Function Button The function (upper right) button is a customizable shortcut that makes accessing your most used functions on the Teric a little easier. The function button can be customized independently for every mode of operation. For Watch mode, the function button can be customized in Settings > Watch. For each dive mode, the function button can be customized in Settings > Dive. P SI DECO 20 2 14 T1 1850 O2/He 21/00 ft min .0TTS 0ft 2h34m SURFACE OC 21% 2h34m SURFACE NDL TTS -- -- FD OC Watch Select Gas Owner:SCUBA Steve Contact:555-123-4567 Beep: OFF Vib: ON

3.1. Default Dive Setup The Teric comes per-configured for recreational diving. The default dive mode for the Teric is Open Circuit Recreational (OC Rec) displayed with the “Big” screen layout. As a quick reference, a diagram of the default diving display is shown below. Many attributes of this default mode are shared with the other dive modes. The following sections go into detail about each screen element. See the OC Rec Example Dive on page 28 for a walk through of how this screen changes through all phases of a dive. 42:18 .0 60ft 21% NDL TTS 2 15 22 OC Rec ! Battery Indicator Depth Dive Mode Ascent Rate No Deco Limit Time To Surface Alert Indicator Dive Time Active Gas OC Rec mode with Big screen layout 3.2. Dive Mode Differentiation Each dive mode is designed to best suit a particular type of diving. OC Rec Designed for use during recreational, no-decompression diving activities. • Nitrox Only - no helium • Safety Stops • Enhanced warnings OC Tec Designed for use during technical diving activities including planned decompression. • Full Trimix • No Safety stops • TTS permanently on screen in Big layout CC/BO Designed for use with a closed circuit rebreather. • Fast switching from closed circuit to open circuit (BO) operating modes. • Separate customizable home screens for CC and BO. Gauge Gauge Mode turns the Teric into a simple depth and time display (a.k.a. a bottom timer). See page 34. • No tissue tracking • No decompression information Freedive Optimized for use while freediving. See page 35. • Freediving sets. Change the Dive Mode from the Dive Settings menu. See details on page 63.

the most information on the screen at the expense of font size. The Top, Bottom, and Deco row content are reserved for the most critical information and are fixed, while pressing the INFO button scrolls through additional data in the Info row. The Info row can be customized with up to three pieces of information. Read mode about Home Screen Customization on page 21. The Standard screen layout is the default layout for OC Tec and CC/BO. 3.3. Main Screen Layout The Teric has two different screen layouts available in every dive mode, Big and Standard. Change the Screen layout from the Dive Settings Menu. See details on page 63. Big layout 42:18 .0 77ft 21% NDL TTS 4 12 22 Top Row Depth, Mode & Ascent Rate Info Row NDL, TTS & Deco Info Bottom Row Dive Time ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS 23 ! Top Row Depth, Mode & Ascent Rate Deco Row NDL, TTS Info Row Customizable Bottom Row Dive Time The Big screen layout provides the largest font size at the expense on screen information. The top and bottom row contents are reserved for the most critical information and are fixed, while pressing the INFO button scrolls through additional data in the Info row. In some modes, the right Info row slot can be customized. Read mode about Home Screen Customization on page 21. The Big screen layout is the default layout for OC Rec, Freedive, and Gauge mode.

The Top Row The top row shows depth, ascent rate, battery and mode information. Depth Displayed to one decimal place in feet or meters. Note: If the depth shows a Flashing Red zero or shows at depth at the surface, then the depth sensor needs service. Ascent Rate Display Shows how fast you are currently ascending graphically and numerically. 1 arrow per 10 feet per minute (fpm) or 3 meters per minute (mpm) of ascent rate. Note: Deco calculations assume 33fpm (10mpm) ascent rate. 6 ft 125. m7 32. 42 66 23 when less than 30 fpm / 9 mpm (1 to 3 arrows) YELLOW when greater than 30 fpm / 9 mpm and less than 50 fpm / 15 mpm (4 or 5 arrows) FLASHING RED when greater than 60 fpm / 15 mpm (6 arrows) Freedive Mode Ascent / Decent Rate Display Freedivers ascend much faster than SCUBA divers. So, ascent rate in freedive mode is measured in feet per second (fps) or meters per second (mps) rather than feet per minute or meters per minute. In freedive mode, 1 arrow per 1 fps / 0.3mps. Descent rate is displayed in addition to ascent rate in freedive mode. Read more about Freedive Mode on page 35. Battery Icon The battery icon is shown on the surface but disappears when diving. If low or critical then the battery icon will appear while diving. Dive Mode Indicator The dive mode indicator is only shown at the surface (except CC & BO mode). when battery change is OK YELLOW when battery needs to be charged. RED when battery must be charged immediately. OC BO OC BO CC OC BO CC FD OC BO CC FD GA OC Rec OC Tec Open Circuit Recreational (OC REC) Open Circuit Technical (OC TEC) Closed Circuit Bailout (Available in CC/BO mode) Freedive Gauge Mode ft 85.6 TTS 23 OC Tec NDL OC BO CC FD 2.6 1.3

Safety Stop Counter Time-To-Surface (TTS) The Deco Row The Deco Row is only shown in the Standard layout, however, the Deco row information described below is shown on the first page of the info row in the Big layout. No Decompression Limit (NDL) Deco Stop Depth and Time Once Mandatory decompression is required, NDL will be replaced by decompression information. By default the Teric uses a 10ft (3m) last stop depth. At this setting, you may perform the last stop at 20ft (6m) with no penalty. The only difference is that the predicted time-to-surface will be shorter than the actual TTS since off-gassing is occurring slower than expected. There is also an option to set the last stop to 20ft (6m) if you wish. See the Decompression Stops section on page 25 for details. 20 NDL 5 NDL The time remaining, in minutes, at the current depth until decompression stops will be necessary. Displays in Yellow when the NDL is less than 5 minutes. 125 DECO 20 2 O2/He ft min The shallowest depth to which you can ascend and how long to hold that stop. 42 0 CLEAR 1:14 In OC Tec and CC/BO mode, the deco clear counter appears in the DECO box and counts up from zero to show for how long your decompression has been clear. 42 0 SAFETY 3:22 In OC Rec mode, the safety stop counter counts down automatically when in the safety stop range. Displays “Clear when the safety stop has completed. See the Safety Stops section on page 24 for details. 125 14 T1 min TTS 23 The time-to-surface in minutes. This is the current time to ascend to the surface including the ascent plus all required deco stops and safety stops. 125 O2/He TTS 23 NDL 21 21 .0 0ft STOPWATCH SURFACE Deep 19:16 FD CLEAR SAFETY Important! All decompression information including Deco Stops, NDL, and Time to surface are predictions that assume: • Ascent rate of 33fpm / 10mpm • Decompression stops will be followed • All programmed gases will be used as appropriate Read more about Decompression and Gradient Factors on page 26.

Standard layout varies between different dive modes. The Info Row The Info row is the center row in the Big layout and the third row in the Standard layout. Info row information is customizable. See Home Screen Customization on page 21 for details. In the Big layout, the Info row shows decompression information as described in The Deco Row section on page 13. O2 21% 58 27 1 m min PPO2 .21 19 22 : O2/He 18/45 58 27 1 m min PPO2 1.23 19 22 : O2/He 10/50 58 27 1 m min 19 22 : 1.3 SP Default Info row CC/BO mode, Standard layout Default Info row OC Rec mode, Standard layout Default Info row OC Tec mode, Standard layout Active Gas In all three examples, the first Info row slot is taken by the Active Gas. In OC Rec mode, the percentage oxygen in the breathing gas is displayed. In OC Tec mode, both the fraction of oxygen and the fraction of helium are displayed. In CC/BO mode, the active gas refers to the diluent gas. Active gas displays in yellow when a better gas is available. Partial Pressure of Oxygen (PPO2) PPO2 of the current breathing gas. Displays in Flashing Red when outside customizable PPO2 limits. Read more about PPO2 Limits on page 67. \\ CC Internal Set point (SP) The high and low internal set points are color coded. O2 21% 58 27 1 m min PPO2 .21 19 22 : O2/He 18/45 58 27 1 m min PPO2 1.23 19 22 : O2/He 10/50 58 27 1 m min 19 22 : 1.3 SP O2 21% 58 27 1 m min PPO2 .21 19 22 : O2/He 18/45 58 27 1 m min PPO2 1.23 19 22 : MOD CNS % 11 m min PPO2 .21 271 SURFACE MOD CNS % 11 m min PPO2 1.71 271 SURFACE O2/He 10/50 58 27 1 m min 19 22 : 1.3 SP O2/He 10/50 58 27 1 m min 19 22 : 0.7 SP High Set point is green Low Set point is magenta OC BO CC 42:18 .0 60ft 21% NDL TTS 2 15 22 OC Rec ! Default Info row in OC Rec mode, Big layout

Dive Time The current length of the dive in minutes and seconds Surface Interval When on the surface, the Dive Time is replaced by a surface interval display. Shows the minutes and seconds since the end of your last dive. Above one hour, the surface interval is displayed in hours and minutes. Above 4 days, the surface interval is displayed in days. 42 18 : 1850 21/00 42:18 103.6ft 4:57 21% ! 1753 2045 0 SURFACE h34m 12 18/45 0.7 1753 2045 0 SURFACE h34m 12 18/45 0.7 Bottom Row, OC Rec Mode on a dive Bottom Row, CC/BO Mode at the surface Alternate Active Gas and Set point Location When the info row is not displaying the active breathing gas (or diluent), or the current internal set point, these values are displayed in the bottom row. The alternate active gas location is at very bottom of the computer display. The alternate Set point location is at the far right of the bottom row. Notification Setting Icon Indicates what notifications are turned on. Only available at the surface. Alert Indicator Indicates there is a persistent warning condition. When the computer detects a dangerous situation, such as high PPO2, a warning is triggered. The large primary warning can be dismissed, but for some critical situations this alert icon will persist until the condition that caused the warning is resolved. See the Alerts section on page 22 for more information. Beep Only Silenced Beep and Vibrate Vibrate Only 42:18 103.6ft 4:57 21% ! The surface interval resets when decompression tissues are cleared.

Info screens provide more information than is available on the main screen. From the main screen, the INFO (bottom right) button steps through info screens. When all info screens have been viewed, pressing INFO again will return to the main screen. Pressing the MENU (bottom left) button will also return to the home screen at any time. Info screens also automatically time-out after 10 seconds, returning to the home screen. This prevents critical NDL, DECO and TTS information from being hidden for an extended period. When using the Standard layout the AI, compass and Tissues Info screens do not automatically time out. Note that although these screens are generally representative of the Teric display, info screen content varies for each mode. For example, decompression related info screens are not available in gauge mode. LAST DIVE 30.7 26:57 m m min SURFACE m min P SI T1 1753 P SI T2 1422 SURFACE NE N 24� m min SURFACE MAX AVG 43.3 103.6ft ft m min SURFACE MOD CNS % 11 m min PPO2 .21 271 SURFACE m min GF 35/75 GF99 22% 136% SurfGF SURFACE m min Δ+5 +8 @+5 20 CEIL 26 SURFACE m min SURFACE TISSUES TEMP 21 49 BATTERY % �C m min SURFACE mBar SURF 1013 mBar NOW 2564 m min SURFACE TIME 2:31 EOD 2:43 m min SURFACE 10:26 .9 109ft 21% NDL TTS 10 4 m 59.3 O2/He 18/45 DECO 58 27 1 m min PPO2 1.23 19 22 : TTS m 59.3 O2/He 18/45 DECO 58 27 1 m min PPO2 1.23 19 22 : TTS Press the INFO button (bottom right), to step through Info Screens Return to Main Screen by: •Pressing MENU button •Stepping past last screen •Waiting 10 Seconds (most screens) Big layout Info row location Standard layout Info row location

Last Dive Info Maximum depth and dive time from the last dive. Only available at the surface. Air Integration (AI) Only available if AI feature is turned on. The contents of the AI info line will automatically adapt to the current setup. Note that GTR and SAC are only available for a single tank (selectable) and GTR is not available when in deco. More information about AI displays can be found in section 9. LAST DIVE 30.7 26:57 m m min SURFACE m min P SI T1 1753 SURFACE T1 Only m min P SI T1 1753 16 PSI min SAC T1 GTRT1 45 SURFACE T1 & GTR/SAC m min P SI T1 1753 P SI T2 1422 SURFACE T1 & T2 m min T1 1753 T2 1422 GTR 45 SAC 16 SURFACE T1, T2 & GTR/SAC Compass Marked headings appear in green while reciprocal headings are shown in red. Green arrows point in the direction of your mark when off course by 5˚ or more. Compass info row will not time out in Standard layout. It is only available when compass feature is turned on. See section 8.1 for more information on compass calibration and use. Maximum Depth The maximum depth of the current dive. When not diving, displays the maximum depth of the last dive Average Depth Displays the average depth of the current dive, updated once per second. When not diving, displays the average depth of the last dive. Maximum Operating Depth In OC mode MOD is the maximum allowable depth of the current breathing gas as determined by PPO2 limits. In CC mode, MOD is the maximum depth of the diluent. Displays in flashing red when exceeded. Read more about PPO2 Limits on page 67. NE N 24� m min SURFACE MAX AVG 43.3 103.6ft ft m min SURFACE MOD CNS % 11 m min PPO2 .21 271 SURFACE MAX AVG 43.3 103.6ft ft m min SURFACE

DilPO2 displays the partial pressure of oxygen in the diluent gas PPO2. Displays in Flashing Red when outside customizable PPO2 Limits. When performing a manual diluent flush, you can check this value to see what the expected PPO2 will be at the current depth. CNS Toxicity Percentage Central Nervous System oxygen toxicity loading percentage. Turns Yellow when greater 90%. Turns Red when greater than 150%. The CNS percentage is calculated continuously, even when on the surface and turned off. When deco tissues are reset, the CNS will also be reset. The CNS value (short for Central Nervous System Oxygen Toxicity) is a measure of how long you have been exposed to elevated partial pressures of oxygen (PPO2) as a percentage of a maximum allowable exposure. As PPO2 goes up, the maximum allowable exposure time goes down. The table we use is from the NOAA Diving Manual (Fourth Edition). The computer linearly interpolates between these points and extrapolates beyond them when necessary. Above a PPO2 of 1.65 ATA, the CNS rate increases at a fixed rate of 1% every 4 seconds. During a dive the CNS never decreases. When back at the surface, a half-life of elimination of 90 minutes is used. So for example, if at the end of the dive the CNS was 80%, then 90 minutes later it will be 40%. In 90 more minutes it will be 20%, etc. Typically after about 6 half-life times (9 hours), everything is back close to equilibrium (0%). MOD CNS % 11 m min PPO2 .21 271 SURFACE MOD CNS % 101 m min PPO2 .21 271 SURFACE MOD min DilPO2 .21 271 SURFACE MOD % m min DilPO2 271 1.77 SURFACE Gradient Factor The deco conservatism value when the deco model is set to GF. The low and high gradient factors control the conservatism of the Bühlmann GF algorithm. See “Clearing up the Confusion About Deep Stops” by Erik Baker for more information. GF99 The current gradient factor as a percentage (i.e. super-saturation percent gradient) 0% means the leading tissue super-saturation is equal to ambient pressure. Displays “On Gas” when tissue tension is less than the inspired inert gas pressure. 100% means the leading tissue super-saturation is equal to the original M-Value limit in the Bühlmann ZHL-16C model. SurfGF The surfacing gradient factor expected if the diver instantaneously surfaced. GF99 and SurfGF display in Red when the current gradient factor modified M-Value is exceeded. Each display in red when 100% is exceeded. m min GF 35/75 GF99 22% 136% SurfGF SURFACE m min GF 35/75 GF99 22% 136% SurfGF SURFACE m min GF 35/75 GF99 22% 136% SurfGF SURFACE OC BO CC

not rounded to the next deeper stop increment. (i.e. not a multiple of 10ft or 3m) @+5 “At plus 5” is the TTS if remaining at the current depth for 5 more minutes. This can be used as a measure of how fast you are on- gassing or off-gassing. Δ+5 The predicted change in TTS if you were to stay at the current depth for 5 more minutes. A positive “Delta plus 5” indicates that you are on- gassing the leading tissue while a negative number indicates that you are off-gassing the leading tissue. Temperature The current temperature in degrees Celsius or degrees Fahrenheit. Temperature units can be set in the Display settings menu. Battery The Teric’s remaining battery level expressed as a percentage. Displays in yellow when battery is low and needs to be recharged. Displays in red when battery is critically low and must be recharged immediately. m min Δ+5 +8 @+5 20 CEIL 26 SURFACE m min Δ+5 +8 @+5 20 CEIL 26 SURFACE min Δ+5 +8 @+5 20 SURFACE TEMP 21 49 BATTERY % �C m min SURFACE TEMP 21 49 BATTERY % �C m min SURFACE Pressure The pressure in millibars. Two values are shown, the surface (surf) pressure and the current (now) pressure. Note that typical pressure at sea level is 1013 millibar, although it may vary with the weather (barometric pressure). For example, in a low pressure system surface pressure may be as low as 980 millibar, or as high as 1040 millibar in a high pressure system. For this reason, the displayed PPO2 displayed on the surface may not exactly match the FO2 (fraction of O2), although the displayed PPO2 is still correct. The surface pressure is set based on the lowest pressure the Teric sees in the 10 minutes prior to the start of a dive. Time In a 12 or 24 hour format. Time format can be changed in the watch settings menu. End of Dive Time (EOD) This is similar to TTS but is expressed as a time of day. The time of day at which you can expect to surface if you depart immediately, ascend at 10mpm or 33fpm, change gases when prompted, and perform all decompression stops as directed. mBar SURF 1013 mBar NOW 2564 m min SURFACE TIME 2:31 EOD 2:43 m min SURFACE TIME 2:31 EOD 2:43 m min SURFACE

Tissues Bar Graph The tissues bar graph shows the tissue compartment inert gas tissue tensions based on the Bühlmann ZHL- 16C model. The fastest tissue compartment is shown on the top, and the slowest on the bottom. Each bar is the combined sum of the nitrogen and helium inert gas tensions. Pressure increases to the right. The vertical Cyan line shows the inert gas inspired pressure. The yellow line is the ambient pressure. The red line is the ZHL-16C M-Value pressure. Tissues that are supersaturated above ambient pressure are shown in yellow, and tissues that are supersaturated above the M-Value are shown in red. Note that the scale for each tissue compartment is different. The reason the bars are scaled in this way is so that the tissues tensions can be visualized in terms of risk (i.e. how close they are as a percentage to Bühlmann’s original super- saturation limits). Also, this scale changes with depth, since the M-Value line also changes with depth. m min SURFACE TISSUES m min SURFACE TISSUES Inspired inert gas pressure Ambient Pressure Increasing Pressure M-Value Pressure 16 tissue compartments{ m min SURFACE TISSUES On surface (sat. with air) Note: Gas is 79% N2 (21% O2, or Air) m min SURFACE TISSUES Immediately after descent Deep Stop m min SURFACE TISSUES On Gassing m min SURFACE TISSUES Last deco Stop Note: Gas is now 50% O2 and 50% N2 m min SURFACE TISSUES

In The Standard layout, the Home screen (first page) Info Row is customizable with 1, 2 or 3 items. Each Dive mode’s home screen can be customized independently In the Open Circuit Rec mode, the right slot of the center row is also customizable. Details about how to customize the Home screen can be found on page 64. Home Screen Reset O2/He OC TEC # Values: 2 PPO2 21/00 .21 Back Home Screen Reset OC TEC # Values: 3 T1 �+5 Back 1753 T2 2045 0 m 0.0 T1 �+5 1753 T2 2045 0 DECO m min TTS OC Tec SURFACE h34m 12 18/45 -- -- - Home Screen Reset OC REC T1 1753 NDL -- P SI Back ft 0.0 O2/He 21/00 ft min DECO PPO2 .21 TTS OC Tec SURFACE h34m 12 -- - -- .0 0ft 21% 2h34m SURFACE NDL T1 1753 -- P SI T1 OC OC Rec Home Screen Customization Options Option Info Display Current Gas PPO2 CNS % MOD Deco Consrv GF99 Ceiling @+5 Δ+5 Tissues Surf� GF TTS NDL Set Point Dil� PPO2 Max Depth Avg. Depth Option Info Display T1 Pressure T2 Pressure GTR SAC Tx & GTR Tx & SAC GTR & SAC T1 & T2 Time of Day Date Stopwatch End of Dive t@Max Depth Temperature Compass˚ Battery % mBar Now mBar Surf� O2/He 18/45 58 27 1 m min PPO2 1.23 19 22 : O2 21% 58 27 1 m min PPO2 .21 19 22 : MOD CNS % 11 m min PPO2 .21 271 SURFACE MOD CNS % 11 m min PPO2 .21 271 MOD SURFACE CNS % 11 m min PPO2 .21 271 SURFACE m min GF 35/75 GF99 22% 136% SurfGF SURFACE m min GF 35/75 GF99 22% 136% SurfGF SURFACE m min Δ+5 +8 @+5 20 CEIL 26 SURFACE m min Δ+5 +8 @+5 20 CEIL 26 SURFACE m min Δ+5 +8 @+5 20 CEIL 26 SURFACE m min SURFACE TISSUES m min GF 35/75 GF99 22% 136% SurfGF SURFACE 125 14 T1 min TTS 23 20 NDL O2/He 10/50 58 27 1 m min 19 22 : 1.3 SP MOD CNS % 11 m min DilPO2 .21 271 SURFACE MAX AVG 43.3 103.6ft ft m min SURFACE MAX AVG 43.3 103.6ft ft m min SURFACE m min P SI T1 1753 SURFACE m min P SI T2 1753 SURFACE m min P SI T1 1753 16 PSI min SAC T1 GTRT1 45 SURFACE m min P SI T1 1753 16 PSI min SAC T1 GTRT1 45 SURFACE m min T1 1753 T2 1422 GTR 45 SAC 16 SURFACE m min T1 1753 T2 1422 T1 1753 SAC 16 SURFACE m min T1 1753 T2 1422 T1 1753 GTR 45 SURFACE m min T1 1753 T2 1422 T1 1753 T2 1422 SURFACE TIME 2:31 EOD 2:43 m min SURFACE TIME 2:31 EOD 2:43 m min SURFACE .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD TEMP 21 49 BATTERY % �C m min SURFACE TEMP 21 49 BATTERY % �C m min SURFACE mBar SURF 1013 mBar NOW 2564 m min SURFACE mBar SURF 1013 mBar NOW 2564 m min SURFACE DATE MAY-30 EOD 2:43 m min SURFACE t@MAX 12:14 EOD 2:43 m min SURFACE Compass 55� EOD 2:43 m min SURFACE

and how the diver is notified of them. For a list of the alerts a diver may encounter see Warnings and Information Displays on page 81 Types of alerts Dive Events Alert the user of non-critical dive events. No specific action is required on the part of the diver. Dive Events time out after 4 seconds or can be cleared by pressing any button. Warnings Alert the user to critical safety information. The cause of warnings could be life threatening if not immediately addressed. Warnings can only be cleared manually by the user. Press any button to acknowledge and clear a warning. For some critical conditions, the alert indicator will persist on screen until the warning condition abates. Errors Alert the user to system errors. Errors represent unexpected system behavior. Contact Shearwater if you experience a system error. Color Coding Color coding of text draws attention to problems or unsafe situations. text indicates normal conditions by default. Note that this normal condition color can be selected in the Settings > Display > Colors menu. YELLOW is used for warnings that are not immediately dangerous but should be addressed. FLASHING RED is used for critical warnings that could be life threatening if not immediately addressed. ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R WARNING LOW PPO2 NDL 21 21 ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R INFO Dive Started NDL 21 21 ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R ERROR Upgrade Fail NDL 21 21 42:18 103.6ft 4:57 21% ! Sample warning - a better gas is available Sample critical alert - Continuing to breathe this gas could be fatal Warning Alert Alert Flashes The warning or critical alert states can be determined without the use of color. Color blind users Warnings display on a solid inverted background. Critical alerts flash between inverted and normal text. Doesn't flash.

such as high PPO2, a warning is triggered. The large primary warning can be dismissed, but the alert indicator will persist until the condition that caused the warning is resolved. Pressing the menu button while the alert icon is present will display the warnings overlay which lists all of the current persistent alerts in order of priority. Pressing the menu button a second time brings up the main menu as normal. Audible and Vibration Alerts In addition to visual alerts, the Teric has audible and vibration alerts to help quickly notify the diver of warnings, errors and dive events. The alert notifications settings can be changed in Main menu > Alerts. It’s important the diver is aware of what type of alert notification they can expect on a dive. The currently selected alert notifications are shown on: • The owners information screen • The surface screen A Test Alerts tool is also available in the Dive Tools menu and should be used regularly before diving to ensure the beeper and vibrator are functioning properly. Limitations Of Alerts All alarm systems share common weaknesses. They can alarm when no error condition exists (false positive). Or they can fail to alarm when a real error condition occurs (false negative). So by all means respond to these alarms if you see them, but NEVER depend on them. Your judgment, education, and experience are your best defenses. Have a plan for failures, build experience slowly, and dive within your experience. 42:18 103.6ft 4:57 21% ! ft 125.6 O2/He 21/00 PPO2 .21 23 19 : TTS M E N U ! WARNINGS •HIGH PPO2 •MISSED STOP P SI DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS ft 2h34m SURFACE OC SURFACE NDL TTS -- -- FD OC OC Tec 0 ft Alerts .0 ✘ Beep Only Beep + Vib. Vib. Only ft 125.6 23 19 : DECO 20 2 14 T1 O2/He 21/00 ft TTS VIB. = ON 2 Long BEEP = OFF ALERTS If you do not like audible or vibrating alerts, they are easily silenced.

Safety and decompression stops are pauses inserted into the ascent to the surface in order to reduce the risk of decompression illness (DCI). 4.1. Safety Stops A safety stop is an optional stop added to all dives before surfacing. Safety stops can be set to fixed times of 3, 4, or 5 minutes, set to adapt based on dive conditions, or turned off completely. See Deco Settings. The Teric does not do “deep safety stops”. That is, there are no extra stops added around 50ft to 60ft (15m to 18m) when ascending from a no-deco dive. Safety stops behave as follows: Safety Stop Required Once the depth exceeds 35ft (11m), a safety stop will be required. An alert will occur when in the safety stop depth range, shallower than 20ft. Automatic Countdown Countdown begins once the depth becomes shallower than 20ft (6m). Countdown will continue while the depth remains in the range of 7ft to 27ft (2.4m to .8.3m). Countdown Paused If the depth goes outside of the range 7ft to 23ft (2.4m to 7.0m), then the countdown pauses, and the remaining time displays in yellow. Safety Stop Complete When the countdown reaches zero, the display changes to “Clear” and you are now clear to ascend to the surface. Countdown Reset The countdown will reset if the depth once again exceeds 35ft (11m) No Lockout for omitting There is no lock-out or other penalty for omitting a safety stop, as they are optional. If you ascend to the surface before the safety stop countdown finishes, the safety stop will appear paused, but this will disappear once the dive ends. We recommend performing safety stops as planned as they offer a reduction in risk of DCI and take little time. 42 0 SAFETY 3:22 0 S SURFA Deep 19: FD CLEAR SAFETY 42 0 3:22 SAFETY 42 0 PAUSED SAFETY ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R INFO Safety Stop NDL 21 21 OC Rec

Decompression stops are mandatory stops that must be followed in order to reduce the risk of decompression illness (DCI) Decompression stops occur at fixed 10ft (3m) intervals. Decompression stops display as follows: Replaces NDL Once the NDL reaches zero, deco stop information will replace it on the left side of the Deco Row in the Standard layout, or the left side of the info row home screen in the Big layout. In OC Rec mode, the deco stop label appears in red as deco obligation is an emergency condition in recreational diving. Deco Stops Required An alert will indicate when Deco Stops are required Do not dive beyond your training Only perform decompression diving if you have received proper training to do so. Diving with any type of overhead ceiling, whether in a cave or shipwreck, or from a decompression requirement, adds significant risk. Have a plan to handle to failures and never rely solely on a single source of information. Deco Stop Violation If you ascend shallower than a deco stop, but remain deeper than your current ceiling, stop info will display in yellow. If you ascend shallower than your current ceiling, the display will flash red. Significant stop violations will result in a “MISSED STOP” alert. Deco Stops Complete In OC Tec mode, once all decompression stops are complete, a “Deco Clear” dive info event will be triggered. If enabled, the Deco Clear counter will begin counting up from zero. In OC Rec mode, once all decompression stops are complete, the safety stop will begin counting down If safety stops or the Deco Clear Counter are turned off, the display will say “Clear”. There is no lock-out or other penalty for violating decompression stops. The policy is to provide clear warnings that the decompression scheduled was violated, to allow you to make decisions based on your training. This may include contacting your dive insurance provider, contacting the nearest recompression chamber, or performing first aid based on your training. No Lockout for violating Deco Stops 125 DECO 50 2 O2/He ft min ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R INFO Deco Needed NDL 21 21 ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R INFO Deco Clear NDL 21 21 125 DECO 50 2 O2/He ft min 125 DECO O2/He ft min 50 2 125 DECO 50 2 O2/He ft min ft 125.6 O2/He 21/00 PPO2 .21 TTS OC SURFACE h34m 12 C L E A R WARNING MISSED STOP NDL 21 21

Factors The basic decompression algorithm used by this computer is Bühlmann ZHL-16C. It has been modified by the use of Gradient Factors that were developed by Erik Baker. We have used his ideas to create our own code to implement it. We would like to give credit to Erik for his work in education about decompression algorithms, but he is in no way responsible for the code we have written. The computer implements Gradient Factors creating varied levels of conservatism. The levels of conservatism are pairs of number like 30/70. For a more detailed explanation of their meaning, please refer to Erik Baker’s excellent articles: “Clearing Up The Confusion About “Deep Stops” and Understanding M-values. The articles are readily available on the web. You might also want to search for “Gradient Factors” on the web. The default of the system depends on the dive mode For OC Rec mode the default conservatism setting is medium (40/85). For OC Tec and CC/BO modes where some decompression is presumed, the default is a more conservative 30/70. The system provides several settings that are more aggressive than the default. Do not edit GF values until you understand the effects. Graph from Erik Baker’s “Clearing Up The Confusion About Deep Stops” Pressure Graph: Gradient Factors 100% 80% 60% 40% 20% 0% Ambient Pressure, absolute (increasing depth > ) Surface Pressure Linear function for gradual change in Gradient Factors M-value Gradient Compartment inert gas pressure, absolute y 0 0 x Ambient Pressure Line M-value Line GF Lo generates first stop GF Hi (surfacing value) maintains safety margin First Stop • A Gradient Factor is simply a decimal fraction (or percentage) of the M-value Gradient. • Gradient Factors (GF) are defined from 0% to 100%. • A Gradient Factor of 0% represents the ambient pressure line. • A Gradient Factor of 100% represents the M-value line. • Gradient Factors modify the original M-value equations for conservatism within the decompression zone. • The lower Gradient Factor value (GF Lo) determines the depth of the first stop. Used to generate deep stops to the depth of the "deepest possible deco stop" • The higher Gradient Factor value (GF Hi) determines the surfacing tissue supersaturation.

Accuracy Decompression information displayed by this computer, including NDL, stop depth, stop time, and TTS are predictions. These values are continuously recalculated and will change with changing conditions. The accuracy of these predictions is dependent on several assumptions made by the decompression algorithm. It is important to understand these assumptions to ensure accurate decompression predictions. It is assumed that the diver’s ascent rate is 33ft/min. Ascending significantly faster or slower than this will impact decompression obligations. It is also assumed that the diver is carrying and plans to use every gas that is currently turned on. Leaving gases that are not expected to be used turned on will result in inaccurate time to surface, decompression stop and decompression time information being displayed. On ascent, it is assumed that the diver will perform decompression stops using the gas with the highest PPO2 below the OC Deco PPO2 value (default 1.61). If there is a better gas available, the current gas will be displayed in yellow, indicating that a gas change is expected. The decompression prediction displayed always assumes that the best gas will be used. Even if the switch to a better gas has not been completed yet, decompression predictions will be displayed as if the switch is about to occur in the next 5 seconds. Divers can encounter longer than expected decompression stops as well as inaccurate time to surface predictions if they fail to switch to a better gas when prompted by the computer. Example: A diver on a decompression dive to 40m/131ft for 40 minutes with GF settings of 45/85 has two gases programmed into their computer and turned on: 21/00 & 99/00. The diver’s decompression schedule will be calculated based on breathing 21% oxygen for the decent, bottom and ascent phases of the dive until the diver ascends to 6m/20ft. At 6m/20ft the PPO2 of the 99/00 mix is 1.606 (less than 1.61), so it is the best decompression gas available. Decompression information for the remaining stops will be calculated and displayed assuming the diver is going to switch to this better gas. This dive profile indicates these stops would be 8 minutes at 6m/20ft and 12 minutes at 3m/10ft. If the diver never makes the switch to 99/00, the computer will not allow them to surface until adequate off-gassing has occurred, but it will continue to assume the diver is about to make the gas switch and the decompression times given will be grossly inaccurate. The 6m/20ft stop will take 19 minutes to clear and the 3m/10ft stop will take 38 minutes to clear. That is a total time to surface difference of 37 minutes. In a lost gas scenario or in the event a diver forgets to turn off a gas they are not carrying before a dive, gases can be turned off during the dive in Main menu -> Edit Gases.

6.1. OC Rec Example Dive This is an example of displays that might be seen on a simple no-decompression dive in OC Rec Mode using the Big layout configuration. 1. Pre-Dive - This is the surface screen the diver sees immediately before descending. At the surface the cyan OC Rec icon is visible, the battery is shown to be about half full, and the Alerts are set to sound and vibrate. 2. Decent - As we pass through 30 feet, the time- to-surface (TTS) shows one minute. This shows that the computer is expecting the diver to ascend at approximately 33 feet per minute or 10 meters per minute. All decompression (and NDL) predictions are based on this assumed ascent rate. 3. Max Depth - The no-decompression limit starts off showing 99, but then starts to show smaller numbers as depth increases. The 3rd screen shows that we will go into deco in 10 minutes. 4. Low NDL - When the NDL goes below 5 minutes, it turns yellow indicating that we should begin making our ascent to avoid a decompression obligation 5. Ascent - As we ascend our NDL begins increasing again indicating that we can stay a bit longer at this shallower depth The ascent rate indicator shows that we are ascending at about 22 fpm or 6mpm. 6. Safety Stop - When we ascend shallower than 20ft we are prompted to perform a safety stop. In this case the safety stop setting has been set to Adapt, and because of our deep profile, the countdown began at 5 minutes. When the safety stop has completed, a CLEAR indicator will inform us that it is safe to surface. .0 0ft 21% 2h34m SURFACE NDL TTS -- -- OC OC REC 2:26 .6 30ft 21% NDL TTS 99 1 10:26 .9 109ft 21% NDL TTS 10 4 18:32 .8 82ft 21% NDL TTS 4 4 1� Pre-Dive 2� Decent 3� Max Depth 4� Low NDL 24:32 .5 45ft 21% NDL TTS 2 48 22 5� Ascent 34:21 .0 18ft 21% NDL TTS 1 3:22 SAFETY 6� Safety Stop Although safety stops are not mandatory, gas supply permitting, best practice is to perform a safety stop on every dive.

This is an example of displays that might be seen on a multi-gas decompression dive in OC Tec Mode using the Standard layout configuration. Max Depth: 60 meters Bottom Gas: Trimix (18/45) Bottom Time: 20 minutes Deco Gases: 50% & 99% O2 1. OC Gas Setup - Best practices include checking your gas list before each dive. This screen is available in Edit Gases section of the main menu in dive mode. All gases that are turned on will be used to calculate the decompression scheduled. Make sure to turn off gases you are not carrying. 2. Verify Decompression Settings - It is also prudent to ensure all other settings are correct before starting every dive. In addition to checking gases, we recommend verifying values in Dive and Deco Settings. 3. Plan Dive - Use the dive planner found in Dive Tools to check the total runtime, decompression scheduled and gas requirements for the dive. The on-board deco planner is limited in functionality, so for complex dives we recommend using desktop or smart phone dive planning software. 4. Pre-Dive - Prior to beginning the dive we can see from the mode indicator that we are in OC Tec mode. Our active gas is currently 18/45, our battery is about half charged, and only vibration alerts are active. 5. Decent - As we descend our dive time begins counting, the Deco Box begins showing our NDL. (Continued on next page) 1�OC Gas Setup ON Edit Gases 50/00 99/00 18/45 00/00 00/00 ACT OFF OFF ON Back 00 0m 0: Deco Deco Model ZHL16C+GF GF Conserv. High 35/75 Last Stop 3 m 2�Verify Deco Settings m 0.0 O2/He 18/45 DECO m min PPO2 .18 TTS OC Tec SURFACE h34m 12 -- -- - 4� Pre-Dive DECO OC 60 bot 20 18/45 27 asc 24 18/45 27 1 25 18/45 24 2 27 18/45 Stp Tme Gas Run 3�Plan Dive - Deco Scheduled Stp Tme Gas Run DECO OC Gas Usage (L) 99/00 537 50/00 646 18/45 3136 m 33.6 O2/He 18/45 NDL 5 4 PPO2 .73 3 19 : TTS 5� Decent 3�Plan Dive - Gas Requirement

6. Max depth - Once NDL hits 0, deco stops will be needed. Stop requirements display in the deco box in place of the NDL. TTS has increased to include deco stop time. 7. Ascent - It is safe to ascend to 24 meters. 2 minutes must be spent at that deco stop. While ascending, the bar graph to the right of the depth shows the ascent rate (10 mpm). All decompression predictions are made assuming an ascent rate of 10 meters per minute. 8. Gas Change - All decompression predictions are made assuming you will switch to the best available gas on ascent. At the 21m stop, the breathing gas turns yellow indicating that a better breathing gas is available. If the switch is not made, deco stop and time information will be inaccurate. 9. Missed Deco Stop - If you ascend shallower than the decompression ceiling the Deco information will flash red. If you fail to descend, a missed deco stop warning will be triggered and the Alert icon will appear. Acknowledge and clear the warning by pressing any button. Re-descend deeper than the stop depth to clear the flashing text and alert icon. 10. Deco Clear - Once all decompression obligation has been cleared, the deco clear counter begins counting up from zero. End of example. m 3.1 O2/He 99/00 DECO PPO2 1.30 63 47 : Lorem ipsum TTS 1 CLEAR 1:14 m 59.3 O2/He 18/45 DECO 58 27 1 m min PPO2 1.23 19 22 : TTS m 42.4 O2/He 18/45 DECO 54 24 2 m min PPO2 .93 22 35 : TTS 10 6� Max Depth 7� Ascent m 21.2 O2/He 18/45 DECO 44 21 1 m min PPO2 .56 28 14 : TTS m 7.2 O2/He 50/00 DECO 22 9 6 m min PPO2 .86 40 33 : TTS ! C L E A R WARNING Missed Deco Stop 8� Gas Change 9�Missed Deco Stop 10�Deco Clear

This is an example of displays that might be seen on a multi-gas decompression dive in CC/BO Mode using the Standard layout configuration. Max Depth: 90 meters Diluent Gas: Trimix (10/50) Bottom Time: 20 minutes Bailout Gases: 14/55, 21%, 50% 1. CC Gas Setup - Best practices include checking your gas list before each dive. This screen is available in Edit Gases section of the main menu in CC mode. For this dive the only diluent gas is Trimix 10/50. (10% O2, 50% He, 40% N2) 2. OC Gas Setup - Several OC gases are required for this dive. If we switch to BO mode, we can use the Edit gases section of the main menu to define our bailout gases as well. We will verify we are carrying sufficient bailout gas when we plan the dive. 3. Verify Decompression Settings - It is prudent to ensure all other settings are correct before starting every dive. In addition to checking gases, we recommend verifying values in Dive and Deco Settings. 4. Plan Dive - Use the dive planner found in Dive Tools to check the total runtime, decompression schedules and bailout gas requirements for the dive. For closed circuit dives, two decompression schedules will be generated. A primary scheduled for closed circuit deco, and a bailout decompression scheduled. The on-board deco planner is limited in functionality, so for complex dives we recommend using desktop or smart phone dive planning software. ON BO Gases 50/00 00/00 00/00 ACT OFF OFF 21/00 14/55 ON Back 00 0m 0: ON CC Gases 10/50 00/00 00/00 ACT OFF OFF ACT OFF OFF 00/00 00/00 Back 00 0m 0: 1� CC Gas Setup 2� OC Gas Setup Deco Deco Model ZHL16C+GF GF Conserv. High 35/75 Last Stop 3 m 3� Verify Deco Settings DECO CC 90 bot 20 10/50 45 asc 25 10/50 45 1 26 10/50 42 2 28 10/50 Stp Tme Gas Run 4� Plan Dive - CC Scheduled DECO BO 66 asc 23 14/55 42 asc 26 21/00 42 1 27 21/00 39 1 28 21/00 Stp Tme Gas Run 4� Plan Dive - BO Scheduled DECO Bailout(BO) 50/00 1993 732 21/00 293 14/55 Gas Usage (L) 4� Plan Dive - Bailout Gas Requirement

m 0.0 MOD CNS % 0 DilPO2 .10 152 10/50 0.7 DECO m min TTS SURFACE h13m 14 CC -- -- - 5� Pre-Dive 6� Diluent Check m 15.8 O2/He 10/50 NDL 52 0 37 : 2 1.3 TTS CC C L E A R INFO Auto SP Up SP 7� Automatic Set point Switch m 46.3 O2/He 10/50 NDL 4 1 53 : 5 1.3 TTS CC SP 8� Decreasing NDL m 90.3 O2/He 10/50 DECO 48 1 m min 1 53 : 92 1.3 TTS CC SP 9� Bottom Time m 61.6 O2/He 10/50 DECO 48 1 m min 29 12 : 96 1.3 TTS 3 CC SP 10� Ascending to First Stop Note on Hypoxic Diluents Hypoxic diluents such as 10/50 in this example require special training since they can be deadly near the surface. 5. Pre-Dive - Prior to beginning the dive we can see from the mode indicator that we are in CC mode. Our active diluent gas is set to 10/50, our set point is 0.7, the Teric’s battery is about half charged, and only vibration alerts are active. 6. Diluent Check - Pressing INFO a few times brings up the info screen that shows the diluent PPO2. The red indicates it is unsafe to breath directly. This information can be viewed at any time to verify the diluent is safe or to check what the expected PPO2 will be when flushing with diluent at depth. 7. Automatic Set point Switch - The optional auto set point switch was enabled with a depth setting of 15m. So as we cross 15m on the descent, the set point automatically switches from 0.7 to 1.3. 8. Decreasing NDL - As we descend deeper, the NDL decreases. The TTS shows it will take 5 minutes to ascend to the surface at 10m/min (33ft/min). 9. Bottom Time - We have completed the bottom time. The TTS indicates we have about 1.5 hours of decompression to do. The first stop will be at 48m for 1 minute. 10. Ascending to the First Stop - Here we are ascending at 3m/min. This is slower than the expected 10m/min ascent rate. This slow ascent has caused the TTS to rise, as most tissues are still on- gassing. m 0.0 O2/He 10/50 DECO m min 0.7 TTS SURFACE h13m 14 CC SP -- -- -

11. First Deco Stop - The slow ascent has caused the first stop to clear before we reached it. This often happens with slow ascents. 12. A Problem Has developed - There is a problem with the O2 readings on the rebreather controller and the decision has been made to bail out. After physically switching the BOV or mouthpiece, the computer needs to be set to BO mode for proper deco calculations. 13. Bailout - One Press of the MENU button brings up “SWITCH CC -> BO” as the first menu item. Pressing SELECT (FUNC button) makes the change. Note the dive mode indicator has changed to BO to indicate the bailout condition. The info row has also changed to reflect the customization settings for BO mode. The best BO gas was automatically selected, and the deco schedule has been adjusted based on the BO gases. 14. Gas Switch Required - We are now at 21m, having completed a few more deco stops. The gas is now displaying in yellow, indicating a better gas is available. 15. Gas Switch - Pressing MENU twice brings up the “SELECT GAS” option in the main menu, and pressing SELECT (FUNC button) enters it. The best gas will already be the initial selection, just press SELECT once more time to make it the active gas. 16. Deco Clear - Follow the deco stops until they have all cleared and the Deco Clear Counter begins counting up from zero. End of example. m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS CC CC BO >> SP 1.3 >> 0.7 11� First Deco Stop 12� A problem has developed m 30.4 O2/He 21/00 DECO 30 2 m min PPO2 .85 42 35 : 92 TTS BO 13� Bailout m 21.2 O2/He 21/00 DECO 21 5 m min PPO2 .66 42 35 : 80 TTS BO 14� Gas Switch Required Select Gas 21/00 50/00 14/55 ACT Back 44 21m 42: 15� Gas Switch m 45.3 O2/He 10/50 DECO 45 1 m min 34 27 : 98 1.3 TTS CC SP m 3.1 O2/He 50/00 DECO PPO2 .65 122 18 : TTS BO 1 CLEAR 3:14 16� Deco Clear

Gauge Mode turns the Teric into a simple depth and time display (a.k.a. a bottom timer). Since decompression tissues are not tracked in Gauge Mode, changing to or from Gauge Mode resets the deco tissues. ` By default, gauge mode is displayed in “Big” layout with the Max depth and Stopwatch shown in the info row. Change to the Standard layout configuration for additional on screen information and increased customizability. Learn about home screen customization options on page 21. While on the surface, the MAX and AVG values display the maximum and average depth of the last dive. The AVG depth displayed on the surface is for the entire dive, regardless of whether the reset average depth option was used. The dive log also records the average depth for the entire dive. Gauge Mode Features: • Resettable average depth • Stopwatch (These features are available in all modes) .0 0ft MAX 103 ft 0:00 STOPWATCH SURFACE 19:16 GA Big layout - default gauge mode configuration� ft 0.0 AVG 46.9 GA ft ft TIME 9:22 0:00 STOPWATCH SURFACE h34m 12 MAX 85.0 Standard layout - gauge mode configuration�

Freedive mode optimizes the Teric for freediving. Although many of the basic functions of the computer are the same as in other dive modes, Freedive mode has several unique features that are covered in this section. Since decompression tissues are not tracked in Freedive Mode, changing to or from Freedive Mode resets the deco tissues. Free Dive mode features: • High Speed depth sampling - 4 samples / second. • Fully customizable auditory and vibration alerts • Freedive focused Info screens • Quick Log Tagging 7.1. Default Freediving Layout By default, freedive mode is in the Big layout. It shares most features with the other dive modes but has a few unique characteristics. • Active Freediving Set shown beside Mode Indicator. • Last Dive time and max depth on home screen • Ascent / decent shown in feet per second (fps) or meters per second (mps) instead of fpm / mpm. .0 0ft MAX 53.0ft 0:00 LD 1:01 STOPWATCH SURFACE Deep 19:16 1.8 FD Like other dive modes, the right home screen slot can be customized.

Freedive mode has a unique info screen sequence which can be seen on the right. Max and Average Decent and ascent screens are only available in freediving mode. Available in either fps or mps. These values can also be added to the home screen in freedive mode. .0 0ft MAX 53.0ft 0:00 LD 1:01 STOPWATCH SURFACE Deep 19:16 FD 1.8 NE N 24� m min SURFACE TEMP 21 49 BATTERY % �C m min SURFACE mBar SURF 1013 mBar NOW 2564 m min SURFACE TIME 2:31 DATE JUN-02 m min SURFACE ft s MAX DESC. 1.3 ft s 1.3 AVG DESC. m min SURFACE ft s MAX ASC. 1.3 ft s 1.3 AVG ASC. m min SURFACE ft s MAX DESC. 1.3 ft s 1.3 AVG DESC. m min SURFACE ft s MAX DESC. 1.3 ft s 1.3 AVG DESC. m min SURFACE 7.3. Freediving Sets A freedive set is a collection of settings customized for a specific type of freediving. The Teric supports 3 independently customizable sets. For each set, the user can customize the alerts activated during a dive as well as a handful of settings that will often change between activities. Fresh water in a pool vs salt water in the ocean for example. Freediving Alerts Freediving alerts differ from normal alerts in several ways. • Freediving alerts only appear for 4 seconds. • Come in 3 colors depending on the urgency of the alert. • Fully customizable within a set • Each has a customizable depth or time as a triggering condition Freedive mode info screen sequence: Press the INFO button (bottom right), to step through Info Screens Return to Main Screen by: •Pressing MENU button •Stepping past last screen •Waiting 10 Seconds

Info - Appears in blue. Caution - Appears in yellow. Offending triggering condition also turns yellow. Danger - Appears in Red. Offending triggering condition also appears in re. All of the freedive alerts are listed is the table below: Freediving Alert Trigger Condition Alert Type Notify 1 Depth Info Notify 2 Depth Info Warn Depth Depth Caution Max Depth� Depth Danger Asc� Notify Depth Info Notify Time Time Info Warn Time Time Caution Max Time Time Danger Surf Time 1 Time Info Surf Time 2 Time Info Depth Repeat Depth Info Time Repeat Time Info Surf Repeat Time Info Regularly test you alerts with the Test Alert tool described on page 40 to ensure they are working and you can hear/feel them through your exposure suit. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R Info Warn Time .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R Info Notify Time .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R INFO Notify Time

section of the main menu. The pop-up will time out after 10 seconds. From this pop-up you can mark and unmark headings and show or hide the Outer Ring compass overlay. The current heading in degrees appears in the center of the pop-up. Mark a heading The heading degree mark is displayed at the bottom of the compass pop-up. The current heading appears green when within 5 degrees of your mark. Green arrows indicate the direction of your mark when you are more than 5 degrees off course A marked heading appears on the compass info screen in green, while the reciprocal heading is shown on the info screen in red. Like on the pop-up, green arrows point in the direction of your mark when off course by 5 degrees or more. . 8. Dive Tools The Dive Tools can be found in the main menu of every dive mode and can be accessed both at the surface and while diving. This section covers dive tool functionality in detail Stopwatch functionality is covered on page 54 in the Watch Tools section. 8.1. Compass The Teric contains a tilt-compensated digital compass. Compass Features • 1 degree resolution • +-5 degree accuracy • Smooth, high speed refresh rate • User set heading marker with reciprocal • True North (declination) adjustment • +- 45 degree tilt-compensation Viewing the compass When enabled, the compass can be viewed in three ways: • As an Info screen • In the Compass Pop-up • As an overlay Compass info screen Press the INFO button until the info row shows the compass info screen. Unlike the regular info screens, the compass never times out when using the Standard layout. ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS Compass Mark = 257� M A R K H I D E U N M A R K S H O W U N M A R K M A R K 76� COMPASS MARK = 24� HIDDEN NE N 24� m min SURFACE NE N 204� m min SURFACE P SI DECO 20 2 14 T1 1850 O2/He 21/00 ft min .0TTS 0ft 2h34m SURFACE OC 21% 2h34m SURFACE NDL TTS -- -- FD OC Dive Tools Edit Gases Select Gas ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS Compass Mark = 257� M A R K H I D E U N M A R K S H O W U N M A R K M A R K 27� COMPASS MARK = 24� HIDDEN NE N 24� m min SURFACE

The compass overlay can show north and your marked heading at all times. Select “Show” on the compass pop-up to display the compass overlay. When enabled, a red north arrow and green heading marker will remain at the edge of the screen tracking their marks. When the overlay is enabled, green arrows at the top of the display indicate the direction of your mark when more than 5 degrees off course. ft 125.6 23 19 : DECO 20 2 14 T1 O2/He 21/00 ft TTS N H I D E U N M A R K M A R K 90� COMPASS MARK = 92� N m 59.3 O2/He 18/45 DECO 58 27 1 m min PPO2 1.23 19 22 : TTS N Compass Limitations It is important to understand some compass limitations before use. Calibration: The digital compass needs occasional calibration. This can be done in the Settings > Compass menu and takes only one minute. See the compass sub-section of the Settings Menu Reference on page 71 for compass calibration instructions. Interference: Metal objects, permanent magnets, and other sources of magnetic interference such as electric motors should be kept away from the compass. We recommend comparing the compass accuracy to a known good compass with and without the interfering object in place to see if it has an effect. Shipwrecks may interfere with the compass reading and so the compass function should not be used near or inside of a shipwreck. Use the same discretion and training as you would with a traditional compass. Magnetic declination (also called magnetic variation) is the difference between magnetic and True North. This can be compensated in the Compass Setup menu using the declination setting. The magnetic declination varies around the world, so it will need to be readjusted when traveling. Magnetic inclination (or magnetic dip) is how much the Earth’s magnetic field points up or down. The Teric’s compass automatically compensates for this angle. However, in some locations (near the poles) the inclination angle can exceed 80° (i.e. the magnetic field points almost directly up or down), in which case the specified accuracy may not be met. Check compass calibration before use Check compass calibration: 1. Place the Teric on a flat surface 2. Marking a heading 3. Rotate the computer 180 degrees 4. Ensure the compass is pointing at the reciprocal heading. See page 71 for compass calibration instructions.

The Test Alerts pop-up provides an quick way to ensure your alerts are working and that you are able to feel them through your exposure suit. Use the up and down arrows to select an alert and press select to test it. The Test Alerts pop-up should be used regularly if you use vibration or auditory notifications. 8.2. Tag Log The tag log feature is useful for marking a point of interest in the dive log for later review. These tags will appear in the dive log when uploaded to your phone or personal computer. Basic tags titles are available from the tag log pop-up to help distinguish tags. The tag log pop-up will time out after 10 seconds. 8.3. Reset Average Depth This feature is useful if you you’d like to get a sense of the average depth of a particular phase of a dive, such as the bottom, or deco phase. Reset Average depth is available in every dive mode. ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS OC ! NavPoint Danger Intrest TAG ft 125.6 23 19 : DECO 20 2 14 T1 O2/He 21/00 ft TTS VIB. = ON 2 Long BEEP = OFF ALERTS 2 Long Negative Positive Click 2 Short 1 Short Alert Alarm 1 Long 3 Short 3 Long Caution Although vibration and auditory alerts are very useful, never rely on them for your safety. Electromechanical devices can and will eventually fail. Always be pro-actively aware of your depth, no-decompression limit, gas supply, and other critical dive data. You are ultimately responsible for your own safety.

Computes the decompression profile assuming the ascent will begin immediately. There are no settings to enter. (RMV is last used value) Limitations The Teric Deco Planner is intended for simple dives. Multi-level dives are not supported. The Deco Planner does not provide thorough validation of the profile. For example, it does not check for nitrogen narcosis limitations, gas usage limitations, CNS percentage violations, or isobaric counter-diffusion risks due to sudden helium switches. The user is responsible for ensuring a safe profile is followed. 8.5. Deco Planner Introduction • Calculates decompression profiles for simple dives. • Calculates gas consumption based on RMV • In closed-circuit (CC) mode, also calculates open- circuit bail-out (BO) The Teric’s deco planner is best suited to decompression diving. For no-decompression diving, use the quick NDL Planner described on page 43. Setup Uses the current gases programmed into the Teric in the current dive mode, as well as the current GF low/ high settings. Deco profile is computed for the current Dive mode (CC or OC). When used on the surface Enter the expected surface interval, bottom depth, bottom time, respiratory minute volume (RMV) and Set Point (closed-circuit only). Note: Residual tissue loading (and CNS%) from recent dives will be used in calculating the profile When the correct values are entered, select “Run Plan” and confirm decompression settings and starting CNS. Important! The Teric’s Deco Planner makes the following assumptions: • Descent rate is 60ft/min (18m/min) and the ascent rate is 33ft/min (10m/min). • For OC, the gas in use will be the gas with the highest PPO2 within the PPO2 limits. • For CC, the diluent in use will be the gas with the highest PPO2 within PPO2 limits. • The planner will use the configured last stop depth. • For CC, the PPO2 is constant for the entire dive. • The RMV is the same while diving as during deco Read more about PPO2 Limits on page 65. DECO RUN PLAN 150 30 Starts in now .25 Depth ft min Back RMV 1.3 SP Ready to Plan DECO GF: Last Stop: Start CNS: 30/70 10ft 0%

Stp: Stop Depth If feet (or meters) Tme Stop Time In minutes Run Run Time In minutes Gas Gas Used %O2/%He The first few rows will show the bottom time (bot) and the ascent legs (asc) to ascend to the first stop. Multiple ascent legs may be shown if gas switches are needed If more than 2 stops are needed, the results will be split onto on several screens. Scroll down to step through the screens. For CC/BO dives There will be two schedules, one for each operating mode. DECO CC 150 bot 30 10/50 60 asc 33 10/50 60 2 35 10/50 50 1 36 10/50 Stp Tme Gas Run DECO CC 40 4 40 10/50 30 4 44 10/50 20 7 51 10/50 10 12 63 10/50 Stp Tme Gas Run A summary screen shows the total dive time, the time spent on deco and final CNS% after the last page of the decompression schedule. DECO CC Run: 63 min Deco: 33 min CNS 35 % Next to Plan BO CC Summary DECO Bailout(BO) 60 asc 33 36/00 60 1 34 36/00 50 1 35 36/00 40 3 38 36/00 Stp Tme Gas Run DECO Bailout(BO) 30 5 43 36/00 20 7 50 99/00 10 11 61 99/00 Stp Tme Gas Run For OC or BO profiles, a total gas consumption report is also given. DECO Bailout(BO) 99/00 9 9 32/00 Gas Usage (CuFt) If no decompression is required, no table will be shown. Instead, the total No-Decompression-Limit (NDL) time in minutes, at the given maximum depth will be reported. Also, the gas quantity required to surface (bailout in CC) will be reported. DECO CC No Deco Stops. Total NDL at 60ft BO gas quantity is 129 min. is 1 CuFt.

The No-Decompression Limit (NDL) Planner is a quick way to determine how much bottom time is available without the need for decompression stops. It can apply a surface interval from none up to 1 day to account for off- gassing. The results are a list of depths, along with the NDL time at that depth and the best of the programmed gases to use at that depth. Only programmed gas are used. Depth NDL Gas 110ft 14min Nx32 80ft 37min Nx36 90ft 27min Nx36 100ft 18min Nx32 NDL Next dive in 1h00m NDL

The Teric is equipped with dual transmitter air integration capability. This section covers operation of the AI feature. Note, AI features are not yet available in the EU. AI Features • Wireless pressure monitoring of 1 or 2 scuba tanks • Units in PSI or BAR • Optional Gas Time Remaining (GTR) and Surface Air Consumption (SAC) rate based on one tank. • Logging of pressure, GTR and SAC • Reserve and critical gas pressure warnings. • Can be used to monitor rebreather O2 and diluent 9.1. What is AI? AI stands for Air Integration. On the Teric, this refers to a system that uses wireless transmitters to measure the gas pressure in a scuba tank and transmit this information to the Teric dive watch for display and logging. Data is transmitted using low-frequency (38kHz) radio frequency communications. A receiver in the Teric accepts this data and formats it for display. The communication is one-way. The transmitter sends data to the Teric, but the watch does not send any data to the transmitter. Although the feature is named “Air” Integration, other gas mixtures can be used with the system as well. When using gas mixtures with oxygen content above 40%, be sure to have proper training on such mixtures, and follow proper cleaning and material compatibility guidelines. Use a backup analog SPG Always use a backup analog submersible pressure gauge as a redundant source of gas pressure information. Transmitter is not O2 Clean The transmitters sold with Shearwater branding are not shipped O2 clean and may only be used with gas mixtures up to 40% O2. Compatible O2 clean transmitters are sold by other vendors.

This section will get you started with the basics of AI on the Teric. Advanced setup and detailed descriptions will be covered in later sections. Install the Transmitter Before using the AI system, you will need to install one or more transmitters on a scuba tank first stage regulator. The transmitter must be installed on a first stage port labeled “HP” (high pressure). Use a first stage regulator with at least two HP ports, so that a backup analog submersible pressure gauge (SPG)can be used. Position the transmitter such that it is on the same side of your body as you wear your Teric handset (FIGURE 5). Range is limited to approximately 3 ft (1 m). A high-pressure hose may be used to relocate the transmitter for better reception or convenience. Use hoses rated for a working pressure of 4500 PSI (300 Bar) or higher. Range 3 ft (1 m) Range 3 ft (1 m) Use a wrench (11/16” or 17mm) to tighten or loosen the transmitter Avoid hand tightening or loosening, as this can stress the body of the transmitter. A backup SPG is recommended Install transmitter on 1st stage HP port Install transmitter on the same side of your body as the handset� Range is approximately 3 feet (1 m)�

Turn on the transmitter by opening the tank valve. The transmitter will automatically wake up when it detects pressure. Pressure data is transmitted every 5 seconds. Turn off the Transmitter To turn off the transmitter, close the tank valve and purge the second stage regulator to drain pressure from the hoses. The transmitter will automatically power down after 2 minutes of no applied pressure. Leave the valve open and the transmitter on for now. Enable AI on the Teric On the Teric, navigate to the Settings > AI menu Change the AI Mode setting to T1 (Tank 1). The AI is now on. Pair the Transmitter Each transmitter has a unique serial number etched on its body. All communications are coded with this number so that the source of each pressure reading can be identified. Settings AI|Off Gases Compass|On AI AI Mode T1 GTR/SAC Off When AI Mode is Off, the AI sub-system is completely powered down and does not consume any power. When on the AI system increases power consumption by approximately 10%. More information about settings in the AI Settings menu can be found on page 70. AI AI Units PSI T1|000000 Back T1 T1 Serial 123456 Rated 3000 PSI Pairing the transmitter is done by going to the T1 Setup menu option. Enter the 6-digit serial number into the T1 Serial # setting. You only need to set this once, as it will be permanently saved in the settings memory. More information about settings in the T1 & T2 Settings menu can be found on page 70.

Always take a few breaths from your regulator or purge your regulator’s second stage while monitoring your tank pressure for a full 10-15 seconds prior to entering the water to ensure your tank valve is turned on. If the first stage regulator is charged but the tank valve has been closed, the breathing gas available to the diver will decrease rapidly and within a few breaths the diver will face an “out of air“ situation. Unlike an analog gauge, the air pressure reported on the Teric will only update every 5 seconds, so the pressure reported by the Teric must be monitored for longer than that (we suggest 10-15 seconds) to ensure the tank valve is open. Including a regulator purge test followed by 10-15 seconds of air pressure monitoring before entering the water as part of your pre-dive safety check is a good way to mitigate this risk. Add an AI display to the home screen AI information is automatically displayed as an info screen when the AI feature is enabled, however, the main screen will not show AI information until manually added. In OC Rec mode, when using the Big layout, the right Info Row slot can be customized to show AI information. Home Screen Reset OC REC T1 1753 NDL -- P SI Back .0 0ft 21% 2h34m SURFACE NDL T1 1753 -- P SI T1 OC OC Rec In any SCUBA mode, when using the Standard layout, the info row can be customized extensively to show AI information. Home Screen Reset OC TEC # Values: 3 T1 �+5 Back 1753 T2 2045 0 m 0.0 T1 �+5 1753 T2 2045 0 DECO m min TTS OC Tec SURFACE h34m 12 18/45 -- -- - Use the Settings > Dive > Home Screen menu to add an AI display to your home screen. Find more information about Home Screen Customization on page 21.

There are 4 display fields that are used to display AI information: 1) T1/T2 Pressure 2) GTR 3) SAC 4) Mini combination display These displays can be viewed in two ways: 1) Added to a customizable zone on the home screen 2) Viewed on the AI info screen. m min P SI T1 1753 SURFACE m min P SI T1 1753 16 PSI min SAC T1 GTRT1 45 SURFACE m min P SI T1 1753 16 PSI min SAC T1 GTRT1 45 SURFACE m min T1 1753 T2 1422 GTR 45 SAC 16 SURFACE T1/T2 Pressure Gas Time Remaining Surface Air Consumption Mini Combination T1/T2 Pressure Display The pressure displays are the most fundamental AI displays, showing pressure in the current units (PSI or Bar). Normal T1/T2 Pressure Display: Low Pressure warnings: Reserve Pressure thresholds can be managed in the AI settings. See page 70 for details. No Communication Warnings: Low Transmitter Battery Warnings: m min P SI T1 1753 SURFACE m min B AR T1 170 SURFACE m min P SI T1 682 SURFACE PSI Display Bar Display Reserve Pressure m min B AR T1 29 SURFACE Critical Pressure I T1 3042 P S I 3042 P S COMMS Alternates I T1 ---- P S I ---- P S Alternates COMMS I 3042 P S I T1 3042 P S Low Bat Alternates I 3042 P S I T1 3042 P S Low Bat Alternates No communication for 30 to 90 seconds No communication for more than 90 seconds Battery should be replaced soon Battery should be replaced immediately

displayed. GTR Display The Gas Time Remaining display shows the time, in minutes, that you could stay at the current depth until a direct ascent to the surface at a speed of 33 feet/ min (10 m/min) would result in surfacing with the reserve gas pressure remaining. The Value is displayed in yellow when less than or equal to 5 minutes . The value is displayed in red when less than or equal to 2 minutes. GTR can only be based on a single tank. The title indicates which transmitter (T1 or T2) is being used for the GTR and SAC calculations in a dark gray font. When on the surface, the GTR displays “---”. GTR is not shown when decompression stops are needed, and will display “deco”. SAC data from the first 30 seconds of each dive is discarded. It then takes an additional few minutes to calculate the average SAC. Therefore, for the first few minutes of each dive, the GTR will display “wait”, until enough data has been collected to begin making GTR predictions. More information on how GTR is calculated can be found in the GTR calculations section on page 51. m min SIP 53 16 PSI min SAC T1 GTRT1 45 SURFACE m min P SI T1 1753 16 PSI min SAC T1 GTRT1 5 SURFACE m min P SI T1 1753 16 PSI min SAC T1 GTRT1 2 SURFACE GTR wait T1 GTR T1 --- No GTR on surface At start of dive, wait for data to stabilize SAC Display The Surface Air Consumption (SAC) display shows the average rate of pressure change over the last two minutes, normalized to as if at 1 ATA pressure. Depending on the current units setting, SAC is either displayed in PSI/minute or Bar/minute. On surface, SAC is average from last dive The average SAC from your last dive is shown when on the surface. When a dive ends, you may notice the SAC value suddenly changes. This is because the SAC display changes from showing the SAC over the last two minutes (when in dive mode) to showing the average SAC for the whole dive. m min P SI T1 1753 16 PSI min SAC T1 GTRT1 45 SURFACE m min P SI T1 1753 1.1 BAR min SAC T1 GTRT1 45 SURFACE SAC wait T1 Note that SAC is NOT transferable between tanks of different sizes. During the first few minutes of a dive the SAC value is not available, while the initial data is being collected for averaging calculations. The SAC display will show “wait” during this time.

A miniature combination display is available that packs more information into a smaller space, at the expense of font size. AI Setting Mini Display Tx & GTR Tx & SAC GTR & SAC T1 & T2 9.4. Using Multiple Transmitters When using multiple transmitters, best reception reliability will be attained when using transmitters of different colors. The different colors have different transmit timing. This prevents communication collisions that could potentially cause a loss of connection. When two transmitters of the same color are used, the potential exists for their communication timing to become synchronized. When this occurs, the transmitters will interfere with each other, resulting in data dropouts. These dropouts may resolve quickly or could last up to 20 minutes or more. By using different colored transmitters, the transmit timing periods are different enough that collisions due to synchronized communications will resolve quickly. Shearwater sells standard gray transmitters, and also yellow transmitters with alternate transmit timing. Using Multiple Transmitters of Same Color May Result in Lost Communications Use different colored transmitters when using more than one transmitter (see above). When using more than one transmitter, use one gray and one yellow for best reliability m min T1 1753 T2 1422 GTR 45 SAC 16 SURFACE m min T1 1753 T2 1422 T1 1753 SAC 16 SURFACE m min T1 1753 T2 1422 T1 1753 GTR 45 SURFACE m min T1 1753 T2 1422 T1 1753 T2 1422 SURFACE

Surface Air Consumption (SAC) is the rate of change of tank pressure, normalized as if at 1 atmosphere of pressure. The units are either PSI/minute or Bar/minute. The Teric calculates SAC averaged over the last two minutes. The data from the first 30 seconds of a dive are discarded to ignore the extra gas that is typically used during this time (inflating BCD, wing, or dry suit). SAC vs RMV Since SAC is simply based on rate of tank pressure change, the calculations do not need to know the tank size. However, this means that the SAC is NOT transferable to tanks of a different size. Contrast this to respiratory minute volume (RMV) which is the volume of gas your lungs experience per minute, measured in Cuft/min or L/min. The RMV describes your personal breathing rate, and is therefore independent of tank size. Why SAC instead of RMV? Since RMV has the desirable property of being transferable between tanks of different sizes, it seems to be the better choice on which to base GTR calculations. However, the main drawback of using RMV is that it requires setting up tank size correctly for each tank. Such setup is easy to forget and is also easy to setup incorrectly. SAC has the great property of not requiring any setup, making it the simplest and most reliable choice. The drawback is that it is not transferable between tanks of different sizes. SAC Formula The SAC is calculated as follows: The time samples are taken 2 minutes apart, and Pamb,ATA is the average ambient pressure (i.e. depth) over this time frame. Since the Teric displays and logs SAC, the formula for calculating RMV from SAC is useful. Knowing your RMV can help with planning dives using tanks of various sizes. Calculating RMV from SAC - Imperial units In the imperial system, tank sizes are described using two values; capacity in Cuft at a rated pressure in PSI. For example, a common tank size is 80 Cuft at 3000 PSI. To convert SAC in [PSI/minute] to RMV in [Cuft/ minute], calculate how many Cuft are stored per PSI, then multiply this by the SAC to get RMV. For example, a SAC of 23 PSI/min with an 80 Cuft 3000 PSI tank would be an RMV of (23 x (80/3000)) = 0.61 Cuft/min. Calculating RMV from SAC - Metric units In the metric system, tank sizes are described using a single number, the tank’s physical size in liters [L]. This is how much gas could be stored at a pressure of 1 Bar, so effectively the units of tank size are [L/Bar]. This makes converting SAC to RMV easy. When using metric units, simply multiply the SAC by tank size. For example, a SAC of 2.1 Bar/min with a 10 L tank would be an RMV of (2.1 x 10) = 21 L/min. = ( 1) − ( 2) 2 − 1 , ⁄ ( ) = [ ] [ ] = [ ] , = [ ]

Gas Time Remaining (GTR) is the time in minutes that can be spent at the current depth until a direct ascent to the surface at a rate of 33 feet/min (10 m/min) would result in surfacing with the reserve pressure. This is calculated using the current SAC value. Safety stops and decompression stops are not considered by the GTR calculations. To calculate GTR, start with the known tank pressure, Ptank. The remaining gas pressure, Premaining, is determined by subtracting off the reserve pressure and the pressure used for the ascent. Premaining = Ptank - Preserve - Pascent , all tank pressures in [PSI] or [Bar] Knowing Premaining, divide this by the SAC adjusted to the current ambient pressure to get GTR in minutes. GTR = Premaining / (SAC x Pamb,ATA) Why aren’t safety stops included? Safety stops aren’t included to simplify the meaning of GTR, and make it consistent across operating modes that do not include safety stops. Managing enough gas for a safety stop is quite simple, especially since they require a relatively small amount of gas. For example, consider if your SAC was 20 PSI/min (1.4 Bar/min). At a depth of 15ft/4.5m, the pressure is 1.45 ATA. So a 3 minute safety stop would use 20 x 1.45 x 3 = 87 PSI (6.1 Bar) of gas. This small amount of gas is easy to factor into the reserve pressure setting. Why is GTR limited to one tank and no deco? Currently, Shearwater does not believe that GTR is the proper tool for decompression dives, especially those involving multiple gases. This isn’t to say AI in general is not a good fit for all technical diving, but the GTR function becomes increasingly complex to manage and understand when multiple gases are used. For one, if multiple gases are used, then tank sizes must be correctly entered. This is a very easy step to forget, and will lead to incorrect GTR values. Multiple gas diving also requires further setup of associating each transmitter to a specific gas mixture, which besides being another setup to forget, gets complicated with corner cases such as having multiple tanks containing the same mixture. Further handling other situations such as only a sub- set of the used tanks with transmitters add complexity and potential for user misunderstandings. Overall, the extra complexity of menus and setup burden on the user would result in a system prone to mistakes and accidental misuse, and not fitting with Shearwater’s design philosophies. Gas management is an incredibly important and also complex activity, especially for technical diving. Education, training, and planning are critical for proper gas management for technical dives. Shearwater feels that a convenience feature such as GTR is not a good application of technology in this case, as its complexity and potential for misuse would outweigh its utility. No compensation for ideal gas law deviations Note that all SAC and GTR calculations assume that the ideal gas law is valid. This is a good approximation up to about 3000 PSI (207 Bar). Above this pressure, the change in gas compressibility as pressure increases becomes a noticeable factor. This is mainly an issue for European divers using 300 Bar cylinders. The end result is early in the dive, when pressures are above 3000 PSI/207 bar, the SAC is over-estimated, resulting in under-estimation of GTR (although this is the good way to err, as it is more conservative). As the dive progresses and pressure drops, this problem rectifies itself and the numbers become more accurate.

Watch mode is the default mode for the Teric at the surface. If the computer is left in Dive mode at the surface, it will timeout back to watch mode after 15 minutes. 10.1. Date And Time On the Teric, the date, time and other watch settings can be set in the Settings > Watch menu. Details about Watch settings can be found in the Settings Menu Reference section on page 74. Editing time resets stopwatch and timers. Alarms are not affected. 10.2. Watch Tools All of the basic watch features can be found in the Watch Tools menu. The watch tools can be accessed from the main menu in watch mode. This section covers the details of the watch tools. Alarms Two independent alarms can be set. Each alarm can be scheduled to go off: • Once • Everyday • Weekdays • Weekends Each alarm has 4 notification options: • Beeping • Vibrating • Beeping & Vibrating • Visual Only Alarms do not share notification settings with dive mode alerts When an alarm is triggered, press either left button to cancel the alarm or either right button to snooze the alarm. Snooze duration can be set in the Alarms Menu. Settings Watch Display General Watch 12-hour Time Format 11:59 PM Time 2018-MAY-09 Date Dive Watch Tools Alerts Alarm 1 C A N C E L S N O O Z E 1217 21 PM Alarm 1 On Alarm 1 12:17 PM Time Everyday Days

10 hours. Press EDIT (bottom left button) to modify the countdown length, or the notification type. The countdown time and notification setting for the timer are shown in gray at the bottom of the timer screen. Press the “+1” to add 1 minute to the countdown. Press any button to Dismiss the DONE Notification. The timer will run in the background and the DONE notification will sound even if the watch is “turned off”. Timer S T O P + 1 R E S E T 8:55 0:10:00+01 h mm ss Timer Beep+Vib 0:10:00 ✘ Timer S T A R T E D I T R E S E T 10:00 0:10:00 Timer Before Start Edit Timer Timer Running Timer D I S M I S S D I S M I S S 0:10:00 DONE Timer DONE Stopwatch The Stopwatch is universal throughout the Teric. A stopwatch started in watch mode will continue in any diving mode until it is stopped. The stopwatch appears on the home screen by default in gauge and Freedive mode, but any dive mode can be customized to include it. The stopwatch has a 10 millisecond resolution and will run for up to 24 hours in the background, even if the Teric is “turned off”. When non-zero, the stopwatch can be reset. If running when reset, it continues running, counting up again from 0. If stopped when reset, then it is set 0 and remains stopped. STOPWATCH S T O P R E S E T 7:33 STOPWATCH S T A R T R E S E T 7:33 While running, the word “Stopwatch” appears in Green� When stopped, the word “Stopwatch” appears in Red� .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD Stopwatch appears by default in freediving and gauge mode� Stopwatch can be added to home screen in any mode�� ft 125.6 2:46 STOPWATCH 20 6 ft min DECO 18/45 23 19 1.3 : TTS 21 MAX ft 103.6

brightness to provide an emergency source of light. It is only useful in the darkest of rooms or caves. Watch Faces Three watch faces are available for the Teric: Analog, Digital and Orbits. The active watch face can be selected in the Watch Tools menu, or by default, it can be toggled by the function button in watch mode. Each watch face can be displayed with various amounts of information. Information levels can be quickly toggled by pressing the Info button. 10.3. Watch Face Colors 15 different watch face colors are available allowing over 100 possible watch face appearances. Watch face colors can be selected in Settings > Display > Colors. ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS OC 23 ! N MON 07 ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS OC 23 ! N DATE MAY-07 mbar 1013 BATTERY 93% SURFACE 9h 04m : 31 AM ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS OC 23 ! N Analog Digital Orbits Settings Display|ft/F Watch Compass Display �F Temp Units Colors Brightness ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS OC 23 ! N Over 100 possible watch face appearances are can be created by selecting the watch face, and information level, and watch face color� 10 10 MON-28 35 10 10 35 10 10 : 31 AM MON-28 ft 125. P SI 6 23 19 : DECO 20 2 14 T1 1850 O2/He 21/00 ft min TTS OC 23 ! N : 31 AM

WATCH OC REC OC TEC Dive Watch Watch Watch Tools Select Gas Select Gas Alerts Dive Tools Dive Tools Log Edit Gases Edit Gases Bluetooth Alerts Alerts Settings (s) Log Log Off Bluetooth Bluetooth Home Settings Settings Off Off Home Home CC/BO GAUGE FREEDIVE Watch Watch Watch CC >> BO Dive Tools Change FD Set SP 0�7 >> 1�3 Alerts Edit FD Set Select Gas Log Dive Tools Dive Tools Bluetooth Alerts Edit gases Settings Log Set Points Off Bluetooth Alerts Home Settings Log Off Bluetooth Home Settings Off Home 11. Menus Menus perform actions and allow settings to be changed. All menus show button hints allowing easy navigation. If no buttons are pushed for 1 minute, the menu system will time-out, returning to the main screen. Anything that had been previously saved will be retained. Anything that was in the middle of editing will be discarded. 11.1. Main Menu All Teric Menus can be accessed from the main menu which can be brought up on any home screen by pressing the menu button. Main menu items differ substantially by mode, as well as at the surface versus on a dive. The most commonly used menu items are placed at the top of the main menu to reduce button presses. Main menu items are listed to the right by mode in the order they appear. In the following section each item will be covered in detail. Note: Items in blue cells are only available at the surface. Adaptive Menus Only menus necessary for the current mode are shown. This keeps operation simple, prevents mistakes, and reduces buttons presses. Dive Watch Tools

Toggles between the selected Dive Mode and Watch mode. Only available at the surface. Watch Tools Only available in watch mode. All of the basic watch features including: • Alarms • Timer • Stopwatch • Flashlight • Watch Face Selection See Watch Tools details on page 53. Dive Tools Available all dive modes both at the surface and during a dive. Dive tools include • Compass • Stopwatch • Tag Log • Dive Plan • NDL Plan • Reset Average Depth • Test Alerts Not all tools are available in every mode. For example the dive planners are not available in Freedive mode. See Dive Tools details on page 38. Dive Watch Tools Switch to CC/BO Depending on the current computer setting, this selection will show as either “CC >> BO” or “BO >> CC”. Selecting this menu item will toggle the Teric to the displayed mode for decompression calculations. When switching to Bail Out while diving, the most appropriate Bail Out gas will become the breathing gas for calculations. At this point, the diver may want to switch to a different gas, but since the diver may have other things to deal with, the computer will make a “best guess” of which gas the diver would choose. Switch Set point (SP 0.7 >> 1.3) CC mode calculates decompression for an unconnected rebreather. Set points are switched in the computer to approximate the rebreather set point. During a dive the Switch Set point menu item will be the first item displayed in the main menu, since the “Watch” displays are disabled when diving. Pressing SELECT when this menu item is displayed changes the PPO2 set point from the low set point to the high set point or vice-versa. To redefine the PPO2 value of a set point, use Main Menu > Set points. The switch set point menu item performs a manual switching of the PPO2 set point. In the Set Points menu, the Teric can be setup to automatically perform set point switches at programmable depths. However, the Switch set point menu item is always available in CC mode to provide manual control. m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS CC CC BO >> SP 1.3 >> 0.7 m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS CC CC BO >> SP 1.3 >> 0.7 Select Gas OC BO CC OC BO CC

a gas from the gases you have created. The selected gas will be used either as the breathing gas in open circuit mode, or the diluent in closed circuit mode. Gases are always sorted from most to least oxygen content. Scroll up and down to select the desired diluent/gas, then press the SELECT button to select that diluent/gas. An ‘ACT’ symbol will appear next to the currently active gas. A gas that is off will be shown in Magenta, but can still be selected. It will be turned on automatically if it is selected. Gases that are programmed but turned off are not used in decompression calculations. Radio Station Gases Select Gas 21/00 50/00 14/55 ACT Back 44 21m 42: m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS CC SP 1.3 >> 0.7 Select Gas Dive Tools The Teric CC/BO system maintains two sets of gases - one for open circuit and one for closed circuit. The way they operate is very similar to the way car radios work with AM and FM stations. When you are listening to an FM station and you push a station selection button, it will take you to another FM station. If you add a new station, it will be an FM station. Similarly, if you are in the AM mode, adding or deleting a station would add or delete an AM station. With radio station gases, when you are in open circuit, adding, deleting or selecting a gas will refer to an open circuit gas. Just like the FM stations are selected when your radio is in FM mode, the closed circuit gases are available in the closed circuit mode. When you switch to open circuit, the gases available will be open circuit gases.

to set up 5 gases for each of the 4 SCUBA modes: • OC Rec • OC Tec • CC/BO • Bailout You must be in the mode you plan to use to edit gases for that mode. For each gas, you can select the percentage of oxygen and helium in the gas. The remainder is assumed to be nitrogen. In OC Rec mode, only oxygen fraction can be edited. Trimix is unavailable in OC Rec mode. Scroll through the gas list using the arrow keys and select the gas you wish to edit. The gas contents are edited one digit at a time. The yellow box shows the digit being edited. Note: The “Act” denotes the active gas. You cannot delete the active gas. If you try, it will generate an error. You can edit it, but cannot set both the O2 and HE to 00. Set Points The Set Points menu is available in CC and BO mode on the surface and while diving. This menu allows you to define the high and low set point. Values from 0.4 to 1.5 are allowed. m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS Edit Gases Dive Tools Alerts ON Edit Gases 50/00 99/00 18/45 00/00 00/00 ACT OFF OFF ON Back 00 0m 0: OC BO CC m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS Edit Gases Alerts Set Points m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS Edit Low SP Edit High SP Back Change Freedive (FD) Set Use this menu item to change between freedive sets. OC BO CC FD m 0.0 O2/He 10/50 DECO 30 2 m min 98 1.3 TTS SURFACE h13m 14 Watch Change FD Set Edit FD Set m 0.0 O2/He 10/50 DECO 30 2 m min 98 1.3 TTS SURFACE h13m 14 1:Deep Change FD Set 2:Pool 3:Rep. ✘

Info - Appears in blue. Warning - Appears in yellow. Danger - Appears in Red Edit Freedive (FD) Set Use this menu item to edit the current freedive set. OC BO CC FD m 30.4 O2/He 10/50 DECO 30 2 m min 42 33 : 98 1.3 TTS Change FD Set Edit FD Set Dive Tools Set 1 Alerts Name Settings Deep A freedive set is a collection of settings customized for a specific type of freediving. Name Allows the user to rename the freediving set. A FD Set Name can be up to four characters in length and appears next to the Freediving mode indicator when at the surface. Default the default freediving sets are: • Deep • Pool • Repetitive (Rep.) Freediving Alerts The freediving alert settings for the current Freedive Set can be defined here. Freediving alerts are triggered by depth or time. All Freediving alerts appear on the screen for 4 seconds or until they are cleared. Additionally each alert can have a custom auditory and vibration notification assigned to them. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD Regularly test you alerts with the Test Alert tool described on page 40 to ensure they are working and you can hear/feel them through your exposure suit. Freediving Alert Trigger Condition Alert Type Notify 1 Depth Info Notify 2 Depth Info Warn Depth Depth Caution Max Depth� Depth Danger Asc� Notify Depth Info Notify Time Time Info Warn Time Time Caution Max Time Time Danger Surf Time 1 Time Info Surf Time 2 Time Info Depth Repeat Depth Info Time Repeat Time Info Surf Repeat Time Info .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R Info Warn Time.0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R Info Notify Time .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R INFO Notify Time

because salt water is more dense. Start Depth The depth threshold for beginning a dive. End Depth The depth threshold for ending a dive. Start Delay The amount of time after crossing the start depth threshold before a dive is begun. Once a dive does begin, the length of the delay is added to the dive time to maintain accuracy. End Delay The amount of time after crossing the end depth threshold before a dive is begun. Once a dive ends, the length of the delay is subtracted the dive time to maintain accuracy. Alerts Available in all modes both at the surface and while diving. Use this menu to set how the Teric will notify the user of an alert. There are 4 modes: • Silent Mode (no alerts) • Beep Only • Vibrate Only • Beep and Vibrate This setting applies to all alerts in every mode.

Dive Log Downloading. Use this option to initialize Bluetooth on your dive computer. Log The on-board log can store about 500 hours of dive logs at the default 10 second log rate of the computer in OC Rec mode. Scroll up and down on the first page of the log to see a list of all of your dives. Select a dive (Top right button) to pan through dive detail screens. Scroll up and down inside the dive detail screens to change the dive. Log contents: • Dive Number • Dive Date and Time • Max Depth • Average Depth • Dive Time • Temperature Graph • Starting and ending tank pressures • SAC • Dive Mode • Surface interval • Surface pressure • Deco Settings • Start & end CNS Log Options The Log options menu allows you to set the next log number to match your lifetime dive count. From here you can also Delete and restore deleted logs. Wait Connect 2 : 50 43m 56min LOG #35 MAY-25 Log Options #34 MAY-22 28m 25min #35 14m DEPTH MAY-25 14:58 MAX28m AV 25min m 0.0 O2/He 10/50 DECO 30 2 m min 98 1.3 TTS SURFACE h13m 14 Bluetooth Settings Log Off The “Off” item puts the computer to sleep. While sleeping, the screen is blank, but the tissue contents are maintained for repetitive diving. The “Off” menu item will not appear during a dive in any mode. It will also not appear after a dive until the dive End Dive Delay Time has expired or the dive has been ended manually to allow for a continuation dive. End Dive The “End Dive” menu item allows you to manually end the dive before the End Dive Delay has expire. This is useful if have set a particularly long End Dive Delay and want to access surface only features of the Teric quickly following a dive.

The Settings menu can be accessed from the Teric’s main menu when at the surface. Dive Mode There are 5 available dive modes: • OC Tec • OC Rec (default) • CC/BO • Gauge (e.g. bottom timer mode) • Freedive When changing to or from Gauge or Freedive mode, the decompression tissues are cleared. This is because when in these modes the Teric does not know what gas you are breathing, and therefore cannot track inert gas loading. Plan repetitive dives accordingly. For more information on which mode to choose, see Dive Mode Differentiation on page 10. Layout The Layout menu item in the dive settings menu is used to select between the 2 available layouts: Big & Standard. m 0.0 O2/He 10/50 DECO 30 2 m min 98 1.3 TTS SURFACE h13m 14 Settings Bluetooth Off 12.1. Dive Settings Menu The first menu item within the settings menu is the Dive Settings Menu. This menu item also conveniently shows the current dive mode in gray. All of the settings in the Dive settings menu are isolated to the Dive mode in which they were set. So, if you customize your layout, home screen, and function button for OC Rec, then switch to OC Tec, when you switch back, your original OC Rec settings will be preserved. Settings Dive|OC Rec Deco|40/85 Dive Dive Mode Home Screen OC Rec Layout Big 4 44 Dive Mode CC/BO OC Tec Gauge Freedive OC Rec ✘ Dive Dive Mode Home Screen OC Rec Layout Big 4 44 Layout Big Standard ✘ Like all of the other settings in the dive settings menu, this option is isolated to the dive mode in which it was set. See the Main Screen Layout section on page 11 for details about the different dive modes.

Home screen. The Standard layout allows customization of the entire first page of the Info row. Pick the number of elements you would like in the info row, then proceed to select which information you would like displayed in each position. The Big layout (default for OC Rec mode) allows for customization of the right info row slot only because the left slot is taken by NDL which cannot be permanently obscured. Note that in OC Tec and CC/BO modes, there is not customization available in the Big layout because TTS should not be permanently obscured while decompression diving. SELECT the right slot to bring up the list of options. Use the arrows to scroll through the available options. Press SELECT again to choose an option. Dive Layout Big Home Screen FUNC Button Compass Home Screen Reset OC REC TTS NDL -- -- Back Home Screen Reset OC REC TTS NDL -- -- Choose Display NDL SAC T2 Pressure T1 Pressure AI GTR .0 0ft 21% 2h34m SURFACE NDL T1 1753 -- P SI T1 OC OC Rec Home Screen Reset OC TEC # Values: 3 T1 �+5 Back 1753 T2 2045 0 m 0.0 T1 �+5 1753 T2 2045 0 DECO m min TTS OC Tec SURFACE h34m 12 18/45 -- -- - In CC/BO mode there is a separate Home screen menu item for each CC and BO. This allows you to optimize your bailout screen layout in advance, minimizing button pushes during an emergency. A complete list of Home Screen Customization options can be found on page 21.

FUNC Setting Description Switch SP Toggles between high and low set points. Switch > BO Changes dive mode to bail out. Switch > CC Changes dive mode to closed circuit. Select Gas Open the gas select menu Compass Opens Compass pop-up Deco Plan Opens Dive planner Stopwatch Opens the Stopwatch pop- up Tag Log Opens Tag Log pop-up Home Screen Quick return to home screen Rst Av Depth Resets average depth No Action No shortcut assigned FUNC Button The function button (top right button) can be customized in every mode to act as a shortcut to your most commonly used tool. Use the FUNC Button menu item in dive settings to choose the function button shortcut. OC BO OC Tec OC BO CC OC BO CC OC BO OC BO CC Dive BO Home BO FUNC Butt. CC FUNC Butt. Switch > BO Select Gas 4 44 CC FUNC Butt. Select Gas Switch > BO Compass Deco Plan Switch SP ✘ In CC/BO mode there is a separate function button shortcut for each CC and BO. This allows you to optimize computer’s operation in advance, minimizing button pushes during an emergency. Some options are only available in specific dive modes. Look for the corresponding mode icon indicating which mode each option is available in. No mode icons indicate the option is available in all dive modes. OC Rec OC Tec OC BO OC BO CC OC Rec

pressure is converted to depth. Settings: • Fresh • EN13319 • Salt Density of freshwater and saltwater differ by about 3%. Saltwater, being denser, will display a shallower depth for the same measured pressure versus the Fresh setting. The EN13319 value is between Fresh and Salt. It is from the European CE standard for dive computers, and is the Teric’s default value. End Dive delay Sets the time in to wait after surfacing before ending the current dive. This value can be set from 10 seconds to 10 minutes. Default is 10 seconds. This value can be set to a longer time if you want brief surface intervals connected together into one dive. Some instructors use a longer end dive delay when teaching courses. Alternatively, a shorter time can be used to exit dive mode more quickly upon surfacing. Log Rate Sets how often dive samples are added to the Teric’s log. More samples will give a higher resolution dive log at the expense of log memory. Default log rate in Freediving mode is 1 second. 10 seconds in every other mode. Maximum log rate in freedive mode is 1/4 second. Maximum log rate in all other modes is 2 seconds. Alerts These settings allow you to modify your notifications settings for warnings and dive events. There are 4 settings: • Visual only • Beep • Vibrate • Beep & Vibrate This setting applies to all alerts in every mode. It is the same alerts item found in the main menu of every mode. For more information on the different types of alerts see the Alerts section on page 22. For a list of alerts you might encounter see the Alert and Information Displays section on page 81.

All values are in absolute atmospheres [ATA] of pressure (1 ATA = 1.013 Bar) OC Low PPO2 PPO2 displays in flashing red when less than this value. (Default 0.19) OC MOD. PPO2 PPO2 displays in flashing red when greater than this value on the bottom phase of the dive. (Default 1.4) OC Deco. PPO2 The decompression predictions (TTS and NDL) will assume that the gas in use at a given depth is the gas with the highest PPO2 that is less than or equal to this value. Also, the suggested gas switches (when the current gas is displayed in yellow) are determined by this value. If you change this value, please understand its effect. For example, if lowered to 1.50, then oxygen (99/00) will not be assumed at 20ft/6m. (Default 1.61) PPO2 displays in flashing red when greater than this value during the deco phase of the dive (within 25ft / 7.6 m. of the next deco stop). CC Low PPO2 PPO2 displays in flashing red when less than this value. (Default 0.40) CC High PPO2 PPO2 displays in flashing red when greater than this value. (Default 1.60) Reset Limits Resets all PPO2 limits for this dive mode back to defaults. Note: In both OC and CC mode, a “Low PPO2” or “High PPO2” alert is displayed when the limits are violated for more than 30 seconds. WARNING Do not change these values unless you fully understand the effect.

Deco Model Will just show Bühlmann ZHL-16 with gradient factors model. GF Conserv. 3 preset conservatism levels are available. In order of increasing conservatism: • Low (45/95) • Med (40/85) • High (35/75) Medium conservatism is the default setting for OC Rec mode. A custom GF option is also available. When this option is selected, fields for editing GF Low and GF High directly will appear in the Deco Menu. OC Tec and CC/BO modes have a custom default of 30/70. For a more detailed explanation of the GF algorithm and the meaning of GF Low and GF High, please refer to Erik Baker’s excellent articles: Clearing Up The Confusion About “Deep Stops” and Understanding M-values. The articles are readily available on the web. Also see the Decompression and Gradient Factors section on page 26. Last Stop Allows you to choose where to do your last stop. The choices are 10ft/3m and 20ft/6m. Note that this setting does not affect decompression. It only makes the TTS prediction more accurate. Safety Stops The Safety Stop setting can be set to the following values: Off 3 minutes 4 minutes 5 minutes Adapt When using the Adapt setting, a 3 minute safety stop will be used, unless the dive exceeds 100ft (30m) or the NDL falls below 5 minutes, in which case a 5 minute safety stop is used. Clear Counter By default, the clear counter will count up from zero once deco has been cleared in OC Tec and CC/BO modes. It can be turned off here. OC Rec

Rec, OC Tec, and CC dive modes. Note that OC Tec mode and BO mode share the same gas list. Editing one will edit the other. This is the same as the Edit Gases item found in the main menu, but is conveniently located along with the other dive settings. For a description of how to appropriately set each gas, please see the Edit Gases section on page 59. In CC/BO mode, both the CC diluent and BO open circuit gas lists are directly accessible, eliminating the need to toggle between the two operating modes to check gases from the Edit Gases option in the main menu. 12.4. Set Points This menu item is only available in CC/BO mode High & Low Set points Like the Set Points selection in the main menu, this menu allows you to edit your High and Low set points. Auto Set Point switch SP Auto Up and SP Auto Down are also available in this menu to set up automatic set point switching. They can be set up to auto switch up only, down only, both, or neither. Use SP Auto Up to set whether the up switch occurs automatically or manually. If SP Auto Up is set to “On”, use Auto Up Depth set the depth at which the auto switch occurs. The menu options are the same for the down set point switch. Example: Up: 0.7 > 1.3 = Auto, Up Depth = 70 ft. Down: 1.3 > 0.7 = Auto, Down Depth = 41ft The dives starts at the 0.7 set point. As you descend past 70ft, the set point switches “up” to 1.3. You finish your bottom time, then begin ascending. When you ascend above 41ft, it switches “down” to 0.7. When a switch is set to “Auto”, you can always manually override the setting at any time during the dive. The automatic switches only occur when crossing the specified depth. Say for example, the switch up depth is set to 50ft. You start the dive on the low set point, then as you descend past 50ft, the set point automatically switches up to high. If at say 80ft you then manually switch back to the low set point, the set point will remain low. If you ascend shallower than 50ft then re-descend deeper than 50ft again, the automatic set point switch will occur again. The Teric enforces a 20ft (6m) gap between switch up and switch down depths to prevent rapid automatic switching between set points for small depth changes. The values 0.7 and 1.3 are shown as examples only. Other values for the low and high set point can be adjusted in the Dive Setup menu. OC BO CC

before a dive, since the settings menu is not accessible during a dive. AI Mode AI Mode is used to completely disable AI, or select which transmitters are active. AI Mode Setting Description Off AI sub-system is completely powered down and consumes no power. When on, AI increases power consumption by about 10%. T1 Transmitter (tank) 1 is enabled. T2 Transmitter (tank) 2 is enabled. T1&T2 Both transmitters are enabled. GTR/SAC Gas Time Remaining (GTR) is the time in minutes that can be spent at the current depth and SAC rate until a direct ascent to the surface at a rate of 33 feet/min (10 m/min) would result in surfacing with the reserve pressure. The SAC rate is averaged over the last two minutes of diving for calculating GTR. GTR/SAC is only be based on one tank. GTR/SAC Setting Description Off GTR is disabled. SAC is also disabled. T1 Transmitter (tank) 1 is used for GTR and SAC calculations. T2 Transmitter (tank) 2 is used for GTR and SAC calculations. GTR and SAC displays are described in the AI Displays section on page 48 Read more about how GTR is calculated on page 52. Read more about how SAC is calculated on page 51. Set AI Mode to OFF when AI not in use Leaving AI enabled when not in use will negatively impact battery life. When a paired transmitter is not communicating, the Teric goes into a higher power scan state. This increases power consumption to about 25% higher than with AI off. Once communications are established, power drops to about 10% higher than with AI off.

The T1 & T2 menu pages allow setup that is individual to each transmitter/tank. Serial Number Setup Every transmitter has a unique 6-digit serial number. This number is etched onto the side of the transmitter. Enter the serial number to pair the transmitter to T1. This number only needs to be entered once. Like all settings, it is stored in permanent memory. Transmitter settings are saved across all dive modes. Reserve Pressure Enter the reserve pressure The valid range is 400 to 2000 PSI (28 to 137 bar). The reserve pressure setting is used for: 1) Low pressure warnings 2) Gas Time Remaining (GTR) calculations A yellow “Reserve Pressure” warning will be generated when the tank pressure falls below this setting. A red “Critical Pressure” warning will be generated when the tank pressure falls below the larger of 300 PSI (21 Bar) or half the reserve pressure. For example, if reserve pressure is set to 700 PSI, the critical warning will occur at 350 PSI (700/2). If the reserve pressure is set to 400 PSI, the critical warning will occur at 300 PSI. 12.6. Compass Enable Disabling the compass will prevent it from being displayed in the info row. The display refresh rate can be reduced when the compass is not displayed on the screen, so disabling the compass allows a sight power savings (about 10%). Outer Ring Toggles the compass outer ring overlay. This can also be toggled from the compass pop-up. More details can be found in the compass pop-up section on page 38. Declination In most places, a compass does not point towards True North, but rather to Magnetic North. The difference in angle between these two directions is called the magnetic declination (also called magnetic variation), and varies around the world. The declination in your location can be found on maps or by searching on-line. This setting can be set from -99° to +99°. If you only need to match an uncompensated compass, or your navigation is all based on relative directions, then this setting is not necessary and can be left at 0°.

accuracy drifts over time or if a permanent magnet or ferromagnetic metal (e.g. iron or nickel) object is mounted very close to the Teric. To be calibrated out, such an object must be mounted with the Teric so that it moves along with the Teric Display. Compare the Teric with a known good compass or fixed references to determine if calibration is needed. If comparing against fixed references, remember to consider the local deviation between Magnetic North and True North (declination). Calibration is typically not needed when traveling to different locations. The adjustment needed then is the True North (declination). When calibrating, rotate the Teric smoothly through as many 3D twists and turns as possible in 15 seconds. Keep metal and magnetic objects away during calibration. The calibration can also be reset back to the factory values. After calibration, it is recommended to compare the compass accuracy with a known good compass or fixed references. 12.7. Display Depth Units Configurable to Feet or Meters. Temp. Units Configurable to ˚F or ˚C. Colors Teric display colors can be changed for added contrast or visual appeal. Themes 4 preset color themes are available: Standard Sunlight Night Predator In addition to these preset themes, the Teric’s color scheme can be extensively customized. Choose the Custom theme option to reveal the customize section of the colors menu. Tips for a good compass calibration • Stay away from metal objects. For example, wrist watches, metal desks, boat decks, desktop computers, etc. can all interfere with the Earth’s magnetic field. • Rotate to as many 3D positions as possible. Upside down, sideways, on edge, etc. • Compare with another compass (not a smart phone as those are terrible) to check your calibration.

can all be customized from this menu. 15 color options are available. Color Options: • White • Red • Green • Blue • Cyan • Magenta • Yellow • Orange • Pink • Lime • Pastel Green • Grapefruit • Ice • Violet • Purple Brightness Brightness This setting does the same thing as the LIGHT (top right) Teric button Screen brightness can be set to one of four fixed levels. Options: Dim: Made specifically for cave conditions. Longest battery life. Low: Second longest battery life. Med: Best mix of battery life and readability. High: Easiest readability, especially in bright sunlight. # Levels This setting defines how many brightness levels are cycled through when pressing the LIGHT button. It also effects how many brightness levels are visible in the Brightness menu setting above. Include Off This setting determines if OFF is available as an option when the LIGHT button is pressed. The battery life of the Teric is dramatically improved when “Off”. This is a convenient feature if you forget your Teric charger at home and are being judicious with battery consumption.

• 12-hours • 24-hours Time Time on the Teric is set here. Date Date on the Teric is set here. Time Zone Setting the time zone can make it easier to adjust the time while traveling. Consult the table below to find the UTC time for the location nearest you. Daylight Savings Simply adds one hour to the time with out needing to change the timezone. FUNC Button Set the Function button shortcut for watch mode. For a complete list of the function button options see section FUNC button options The function button has different options that can be independently set for each mode. In watch mode, there are eight function button options. FUNC Setting Description Watch Face (Default) Cycles the watch face between Digital, Analog, and Orbits. Flashlight Turns on the flashlight function Alarms Brings up the alarms menu Stopwatch Opens the Stopwatch pop- up Timer Opens the timer pop-up Turn Off Turns Teric Off No Action No shortcut assigned UTC Time Zone Location +13:00 Tonga +12:00 Aukland +11:00 Solomon Islands +10:00 Sydney +9:00 Tokyo +8:45 Perth +8:00 China +7:00 Bangkok +6:00 Dhaka +5:45 Nepal +5:30 Mumbai +5:00 Karachi +4:30 Kabul +4:00 Seychelles +3:30 Tehran UTC Time Zone Location +3:00 Istanbul +2:00 Cape Town +1:00 Paris 0:00 London -1:00 Azores -3:00 Rio de Janeiro -4:00 Halifax -5:00 New York -6:00 Mexico City -7:00 Denver -8:00 Los Angeles -9:00 Anchorage -10:00 French Polynesia -11:00 American Samoa

on the Owner Info screen. Battery Quick Charge When enabled Quick charge charges the watch a little bit faster. However, not all not all USB ports supply sufficient current for quick charge. Quick Charge is enabled by default. If you’re having problems charging your Teric, disabling quick charge may help. Defaults This will reset all user changed options to factory settings and / or clear the tissues on the Teric. A reset to defaults cannot be reversed. Note: This will not delete dive logs, or reset dive log numbers. System Info The System Info section lists the computer’s serial number as well as other technical information you may be asked to provide to tech support for troubleshooting purposes.

13. Firmware Update and Log Download It is important to keep the firmware on your dive computer up to date. In addition to new features and improvements, firmware updates address important bug fixes. There are two ways to update the firmware on your Teric: 1) With Shearwater Cloud Desktop 2) With Shearwater Cloud Mobile Please note that Teric does not support the original Shearwater desktop application. Connect to Shearwater Cloud Desktop On your Teric, start Bluetooth by selecting the Bluetooth menu item from the main menu. Upgrading the firmware resets decompression tissue loading. Plan repetitive dives accordingly. During the update process, the screen may flicker or go blank for a few seconds Ensure you have the most recent version of Shearwater Cloud Desktop. You can get it here. 1 2 3 m 0.0 O2/He 10/50 DECO 30 2 m min 98 1.3 TTS SURFACE h13m 14 Bluetooth Settings Log In Shearwater Cloud Desktop: 1. Click the connect icon to open the connect tab. 2. Scan for Dive Computer 3. Once you’ve connected the computer once, use the Teric tab to connect faster next time Wait Connect 2 : 50 Shearwater Cloud Desktop Connect Tab

connect tab will show a picture of the dive computer. Download Dives Select “Download Dives” from the connect tab. A list of dives will be generated and you can un-select any dive logs you don’t want to download, then press OK. Shearwater Cloud Desktop will transfer the dives to your computer. The first time you download dives from your Teric, you will be asked to give the Teric a name. If you have multiple Shearwater dive computers, you will be able to easily tell which dive was downloaded from which dive computer. Shearwater Cloud Desk- top Connect Tab Update Firmware Select “Update Firmware” from the connect tab. Shearwater Cloud Desktop will automatically select the latest available firmware. When prompted, select your language and confirm the update. The Teric screen will give percentile updates of receiving the firmware, and then the Personal Computer will read “Firmware successfully sent to the computer” on completion. Firmware updates can take up to 15 minutes. Ensure your Teric has sufficient power to complete the firmware update prior to starting it. Select the dives you wish to download and press OK

Ensure you have the most recent version of Shearwater Cloud Mobile. Download it from Google Play or the Apple App Store. Connect to Shearwater Cloud Mobile On your Teric, start Bluetooth by selecting the Bluetooth menu item from the main menu. m 0.0 O2/He 10/50 DECO 30 2 m min 98 1.3 TTS SURFACE h13m 14 Bluetooth Settings Log Wait Connect 2 : 50 On Shearwater cloud mobile: 1. Prress the connect icon at the bottom of the screen 2. Select your teric from the list of bluetooth devices Download Dives Select “Download Dives” A list of dives will be generated and you can un-select any dive logs you don’t want to download, then press OK. Shearwater Cloud will transfer the dives to your smart phone. Update Firmware Select “Update Firmware” from the connect tab. Shearwater Cloud Desktop will automatically select the latest available firmware. When prompted, select your language and confirm the update. The Teric screen will give percentile updates of receiving the firmware, and then the mobile app will read “Firmware successfully sent to the computer” on completion. Firmware updates can take up to 15 minutes. Ensure your Teric has sufficient power to complete the firmware update prior to starting it.

The included Teric strap is a durable stretchy silicone designed to grip a wet suit or dry suit without sliding around. Various strap options are available. 15. Charging The Shearwater Teric charges wirelessly when mounted on the included dock and on some third party wireless charges. The Teric screen rotates 90 degrees for easy viewing of the time when the Teric is mounted on the charger. The screen will turn off after 20 seconds to preserve the long term health of the screen and battery, but pressing any button will wake up the Teric so the time can be viewed. The SUN button will adjust the screen brightness and the OFF button will turn the screen off. Dive mode functions are not available while the Teric is charging. For extra length, use the included extender strap. The strap is fastened to the Teric via stainless steel watch lugs which can be easily removed and replaced with two standard 1.5mm hex screwdrivers (included). The Teric is a compatible with most 22mm off the shelf straps for unlimited customizability. Warning - Do not over torque lug screws. Once it feels tight, stop screwing. Over torquing can damage screw threads. Additional lug screws are include in the box.

the fastest, most efficient charge. If the Teric stops charging and the charger light begins to flash red, remove and replace the Teric and charging should resume. Battery Care Lithium-ion batteries, such as the one in the Teric, can be damaged if completely discharged. The Teric has internal protection which disconnects the battery before complete discharge occurs. However, a small amount of self-discharge still occurs, which can lead to complete discharge and subsequently battery damaged if stored for long periods without recharging. To prevent damage to the battery please do the following: 1) Fully charge the Teric prior to storage 2) Top up the Teric battery every 6 months Charging time The Teric can be charged with any USB wall power adapter or with a computer. Charging time is approximately 1.5 hours with Quick Charge enabled. and 3-4 hours without. Behavior on Dead battery Settings All settings are retained permanently. No loss of settings occurs if the battery dies. Clock The clock (time and date) data will be lost if the Teric experiences a total loss of power. Once the battery is charged, you will need to update the Clock and Date in the Settings > Watch Menu. The Teric uses a highly accurate quartz crystal for time keeping. Expected drift is about 1 minute per month. If you notice drift, it is easily corrected in the Settings > Watch menu. Decompression tissue loading If the battery dies between repetitive dives the decompression tissue loading will be lost. Plan repetitive diving accordingly. When deco tissues are reset, the following are also reset: • Inert gas tissue loadings set to saturated with air at current atmospheric pressure • CNS Oxygen Toxicity set to 0% • Surface Interval time set to 0 Charger Positioning Wireless chargers quickly lose efficiency when the transmission and receiver coils are not aligned properly or there is too large an air gap. Correct positioning on charger - no gap Incorrect positioning on charger - air gap

the Teric. 16.1. Warnings and Information Displays The following table lists warnings and errors and information alerts you may see, their meaning, and steps to take to solve any problems. The highest priority notification is listed first. If multiple alerts occur simultaneously, the error with the highest priority will be displayed. Clear that error by pressing the INFO button to see the next error. See the Alerts section on page 22 for more information. Display Meaning Action to take .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING LOW PPO2 The PPO2 is below the limit set in the PPO2 limits menu� Change your breathing gas to one safe for the current depth. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING HIGH PPO2 The PPO2 is above the limit set in the PPO2 limits menu� Change your breathing gas to one safe for the current depth. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING MISSED STOP A required decompression stop was violated� Descend deeper than the currently displayed stop depth. Monitor for symptoms of DCS. Use extra conservatism for future repetitive dives. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING FAST ASCENT The ascent was sustained as faster than 10m/min Use a slow ascent rate. Monitor for symptoms of DCS. Use extra conser- vatism for future repeti- tive dives. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING LOW BATTERY The internal battery is low� Recharge the battery. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING TISSUES CLEAR The decompression tissue inert gas loading has been set to default levels� Plan repetitive dives accordingly. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING VERY HIGH CNS Central Nervous System (CNS) toxicity clock exceeded 150% Switch to a gas with a lower PPO2 or ascend shallower (decompres- sion ceiling allowing) .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING HIGH CNS Central Nervous System (CNS) toxicity clock exceeded 90% Switch to a gas with a lower PPO2 or ascend shallower (decompres- sion ceiling allowing) Contact Shearwater The subsequent list of warnings, errors and notifications is not exhaustive. Please contact Shearwater if you experience any unexpected errors: [email protected]

m min B AR T1 29 SURFACE + .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING TI CRITICAL Tank pressure has fallen below the critical pressure. Be aware that gas is run- ning low. Begin to end your dive and perform a controlled ascent to the surface. m min P SI T1 682 SURFACE + .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING TI LOW PRESS Tank pressure has fallen below the reserve pressure setting. Be aware that gas is run- ning low. Begin to end your dive and perform a controlled ascent to the surface. I T1 3042 P S I 3042 P S COMMS Alternates I T1 ---- P S I ---- P S Alternates COMMS I 3042 P S I T1 3042 P S Low Bat Alternates I 3042 P S I T1 3042 P S Low Bat Alternates .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING T1 LOW BATT Low transmitter battery. Replace the transmitter battery. See Transmitter Battery Replacement on page 83 .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING DECO NEEDED Decompression stops are required� OC Rec mode only� Perform decompression stops as directed. NDL is less than 5 minutes� OC Rec mode only� Ascend soon to avoid decompression obliga- tion. I T1 ---- P S I 3042 P S No Comms Alternates No communications for 30 to 90 seconds. See AI Connection prob- lems on page 82 I T1 3042 P S I 3042 P S COMMS Alternates I T1 ---- P S I ---- P S Alternates COMMS I 3042 P S I T1 3042 P S Low Bat Alternates I 3042 P S I T1 3042 P S Low Bat Alternates + .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING T1 LOST COMMS No communications for 90+ seconds. See AI Connection prob- lems on page 82 GTR T1 --- GTR is not available when on the surface. None. GTR will display during a dive. Display Meaning Action to take GTR wait T1 GTR (and SAC) are not available for the first few minutes of a dive� None. After a few minutes, enough data has been collected for display. 16.2. AI Connection problems If you are seeing “No Comms” errors, follow these steps: If the “No Comms” is persistent: Check that the proper serial number is entered into the AI SetupT1/T2 Setup menu. Ensure the transmitter is turned on, by connecting it to a first stage and turning on the tank valve. Applying high pressure > 50 PSI (3.5 Bar) is the only way to turn on the transmitter. The transmitter will power off after 2 minutes of no pressure. Bring the handset within range (3ft / 1m) of the transmitter. Having the transmitter too close (less than 2 inches / 5 cm) can also cause communication loss. If the “No Comms” is intermittent: Search for sources of radio frequency (RF) interference, such as HID lights, scooters, or photo flashes. Try eliminating such sources to see if this solves the connection problem. • Check the distance from transmitter to handset. If range related dropouts are occurring during diving, locating the transmitter on short length of high pressure hose is possible to decrease the transmitter to handset distance. .0 0ft MAX 103.6ft 4:57 STOPWATCH SURFACE Deep 19:16 FD C L E A R WARNING LOW NDL

The Teric dive computer and transmitter should be stored dry and clean. Do not allow salt deposits to build up on your dive computer. Rinse your computer with fresh water to remove salt and other contaminants. Do not wash under high pressure jets of water as it may cause damage to the depth sensor. Do not use detergents or other cleaning chemicals as they may damage the dive computer. Allow to dry naturally before storing. Store the dive computer and transmitter out of direct sunlight in a cool, dry and dust free environment. Avoid exposure to direct ultra-violet radiation and radiant heat. 17.1. Transmitter Battery Replacement Transmitter battery type is 3V Lithium CR2. 1. Loosen the cap by turning counter-clockwise with a coin. 2. Remove old battery and discard according to local regulations on lithium batteries. 3. Install the new battery, positive end first. 4. Replace the o-ring (size AS568-016, nitrile A70) and lightly lubricate it with a silicone grease. When installing the o-ring, roll it over the lip from the coin slot side. Do not roll it over the threads. 5. Install the battery cap by turning clockwise. Start slowly to avoid cross-threading the cap. The cap should be flush with the case when properly installed. 18. Servicing There are no user serviceable parts inside the Teric or transmitters. Do not tighten or remove the faceplate screws. Clean with water ONLY. Any solvents may damage the Teric dive computer. Service of the Shearwater Teric may only be done at Shearwater Research, or by any of our authorized service centers. Contact [email protected] for service requests. Evidence of tampering will void your warranty! Glossary CC - Closed circuit. Scuba diving using a rebreather where exhaled gas is recirculated with carbon dioxide removed. GTR - Gas Time Remaining. The time, in minutes, that can be spent at the current depth and SAC rate until a direct ascent to the surface would result in surfacing with the reserve tank pressure. NDL - No Decompression Limit. The time, in minutes, that can be spent at the current depth until mandatory decompression stops will be required. O2 - Oxygen gas. OC - Open circuit. Scuba diving where gas is exhaled into the water (i.e. most diving). PPO2 - Partial Pressure of Oxygen, sometimes PPO2. RMV - Respiratory Minute Volume. Gas usage rate measured as the volume of gas consumed, adjusted as if at a pressure of one atmosphere. Units of Cuft/ minute or L/minute. SAC - Surface Air Consumption. Gas usage rate measured as the rate of tank pressure change, adjusted as if at a pressure of one atmosphere (i.e. surface pressure). Units of PSI/minute or Bar/minute.

Gauge Freedive Decompression Model Bühlmann ZHL-16C with GF Display Full Color, Round 1.39” 400x400 AMOLED Pressure (depth) sensor Piezo-resistive Calibrated Range 0 Bar to 14 Bar Accuracy +/-20 mBar (at surface) +/-100 mBar (at 14bar) Crush Depth Limit 20 Bar (~200msw) Surface Pressure Range 500 mBar to 1040 mBar Depth of dive start 1.6m (adjustable in Freedive mode) Depth of dive end 0.9m (adjustable in Freedive mode) Operating Temperature Range +4ºC to +32ºC Short-Term (hours) Temperature Range -10ºC to +50ºC Long-Term Storage Temperature Range +5ºC to +20ºC Battery Rechargeable Lithium Ion battery Battery Operating Life 50 hours in dive mode. 3 months in Standby Communications Bluetooth Smart Compass Resolution 1˚ Compass Accuracy ±5˚ Compass Tilt Compensation Yes, 45˚ pitch and roll Dive Log Capacity Over 400 hour detailed log at 10s logging frequency. 2000 dive basic log Wrist Attachment 22mm width silicone watchband. Weight 120g Size (W X L X H) 54.5mm x 53.5mm x 17.5mm Teric Specifications (cont.)

Specification Transmitter Wireless Range 3 ft (1 m) Depth Rating 500 ft (150 m) Pressure Range 0 to 4350 PSI (0 to 300 Bar) Pressure Resolution 2 PSI (1 Bar) Operating Temperature 22°F to 140°F (-6°C to 60°C) Size 2.95” (V) x 1.38” (Diameter) 75mm (L) x 35mm (Diameter) Weight 0.26 lbs (116g) Packaged Size 3.74” (L) x 2.56” (W) x 2.17” (H) 95mm (L) x 65mm (W) x 55mm (H) Packaged Weight 0.40 lbs (180g) Battery Type CR2 Lithium User replaceable Battery Life 300 dive hours at two 1-hour dives per day Up to 5 year shelf life Annual replacement recommended Battery Warning Levels Warning (yellow) < 2.75V Critical (red) < 2.50V Battery Cap O-ring Size AS568-016, Nitrile (Buna-N) A70 High Pressure Fitting 7/16” UNF High Pressure O-ring Size AS568-012, Viton™ material Turn-on conditions Pressure > 120 PSI (8 Bar) Battery > 2.75 V Turn-off conditions Pressure < 50 PSI (4 Bar) for 2 minutes Internal Over- Pressure Relief Valve Yes FCC Warning A) USA-Federal Communications Commission (FCC) This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy. If not installed and used in accordance with the instructions, it may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by tuning the equipment off and on, the user is encouraged to try and correct the interference by one or more of the following measures: • Reorient or relocate the receiving antenna • Increase the distance between the equipment and the receiver. • Connect the equipment to outlet on a circuit different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help. Any changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Caution: Exposure to Radio Frequency Radiation. This device must not be co-located or operating in conjunction with any other antenna or transmitter. Teric Dive Computer Contains TX FCC ID: 2AA9B05 Pelagic Pressure Systems Transmitter Contains TX FCC ID: MH8A Industry Canada Warning b) Canada - Industry Canada (IC) This device complies with RSS 210 of Industry Canada. Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of this device. L‘utilisation de ce dispositif est autorisée seulement aux conditions suivantes : (1) il ne doit pas produire d’interference, et (2) l’utilisateur du dispositif doit étre prêt à accepter toute interference radioélectrique reçu, même si celle-ci est susceptible de compromettre le fonctionnement du dispositif. Caution: Exposure to Radio Frequency Radiation. The installer of this radio equipment must ensure that the antenna is located or pointed such that it does not emit RF field in excess of Health Canada limits for the general population; consult Safety Code 6, obtainable from Health Canada’s website. Teric Dive Computer Contains TX IC: I2208A-05

Richmond, BC V6V 2A2 Tel: +1.604.669.9958 [email protected] US Service Center DIVE-Tronix, LLC. Snohomish, WA, USA Tel: +1.858.775.4099 [email protected] EU Service Center Narked at 90 Ltd 15 Bentley Court, Paterson Rd, Wellingborough, Northants, UK NN8 4BQ Tel: +44.1933.681255 [email protected] Asia/Pac Service Center Rob Edward Wellington, NZ Tel: +64.21.61535378 [email protected] www.shearwater.com www.facebook.com/DiveShearwater www.youtube.com/shearwaterresearch