Dive computer JACK User Manual Ver. 1.0 Made in Italy

Transcription

1 ive computer JAK User Manual Ver. 1.0 Made in Italy 1 English

2 2 English

3 IMPORTANT WARNINGS 4 GENERAL WARNINGS 4 WARNINGS 5 ives with Nitrox mixtures. 6 efore the dive 6 Limits of dive computers 7 are and maintenance 7 TEHNIAL HARATERISTIS OF THE OMPUTER 8 Hardware 8 ertification 8 Software 8 rief summary of Technical haracteristics 8 Recharging the battery 10 ives in especially cold water (<3 ) 11 JAK OUT OF THE WATER: 12 Sleep Mode 12 Lock screen 13 JAK menu structure 14 Watch screen 15 Watch Menu 16 ISPLAY (Screen settings) 17 SYS SET (date and time) 18 P MOE (connected to P or Mac) 19 OMPASS (ompass Settings) 20 Reset to efault (reset to factory defaults) 21 INFO 22 ive menu 23 IVE SET 1 (ive settings 1) 24 IVE SET 2 (ive settings 2) 26 FREE SET (Freedive Settings) 27 FREE ALARM (Freedive Warning) 29 MIX (ive Mix Settings) 31 PLANNER (within no-deco limits) 32 PLANNER (deco planner) 33 LOGOOK 34 ALARM (Open ircuit Alarms) 35 The ompass 36 Weather Forecast 37 Altimeter, arometer, Thermometer 38 Apps for JAK Free 39 JAK URING THE IVE 40 Freediving 40 Reducing the risk of Oedema / Hemoptysis 41 Reducing the risk of Taravana 42 Hydration alert 43 ive in SUA mode (O) 44 Other information during the dive 46 ive in GAUGE mode 48 ompass during the dive 49 Apps during the dive 50 JAK AFTER THE IVE 51 No-Fly 51 esaturation information 52 App Menu 53 HRONO: Stopwatch 54 MOON: Phases of the Moon 54 FITNESS: Step counter 55 LOK ALARM 56 onnect your JAK computer to your Mac or P. 57 Updating your JAK ive omputer 57 ERTIFIATE OF GUARANTEE 58 English 3

4 ongratulations on your purchase of a SEA dive computer. Your SEA dive computer is a technologically advanced instrument, furnished with unique and innovative software for freediving and diving with scuba equipment. The JAK computer features a true algorithm for freedives as well, which makes it completely different and innovative by reducing the risk of accidents for the diver. This makes JAK a unique dive computer and places it at a higher level of safety. JAK also features a IVE function with its full decompression algorithm for calculating dives using scuba equipment, with either air or Nitrox, up to 50% O 2. heck for any updates to this manual. IMPORTANT WARNINGS GENERAL WARNINGS Read the user manual fully before using the SEA computer. Using the computer incorrectly will void the warranty and can permanently damage the computer. Only use the dive computer after you have read all sections of the instruction manual and you have understood how it works. The dive computer is not a substitute for diver training and should only be used by divers who have been properly trained and who have earned the appropriate license issued by a ertified Teaching Association. The SEA computer is an auxiliary device during a dive. Therefore, it is crucial that each diver always carry with them a suitable table that will enable them to conduct the decompression phase if the unit should malfunction. The computer does not replace an understanding of decompression tables, which divers must always carry with them for safety, along with a depth gauge and a dive watch. 4 English

5 Freediving entails the risk of syncope, taravana, pulmonary oedema, and hemoptysis, while diving with scuba equipment entails the risk of decompression sickness, oxygen toxicity, and other risks generally related to diving: even careful reading of this manual and correct use of the instrument does not exclude potential dangers. Anyone unfamiliar with these risks or who does not knowingly accept them must not dive with a SEA computer. Underwater diving entails certain risks that can never be completely eliminated, either while freediving or diving with scuba equipment. No freediving computer can guarantee that there will be no risk of syncope, taravana, pulmonary oedema, or hemoptysis, and in the case of diving with scuba equipment, no computer or dive table can guarantee that there is no risk of decompression sickness or oxygen toxicity to the central nervous system, even if the diver follows the indications from the computer or the table diligently and correctly. The computer cannot take into account individual physiological changes that can change from one day to the next. For this reason it's good practice to use the device conservatively and cautiously, remaining within the limits shown by the computer in order to minimize the risks. Two divers may not share a single computer while diving. Each diver must have their own device on their wrist to provide information and store data exclusively for the wearer. o not dive with a computer that does not have records of recent previous dives, since its calculations cannot account for data that it has not stored. For safety reasons, it is NOT possible to set FREE mode as the main mode unless 12 hours have elapsed since the most recent SUA or GAUGE dive. It is strictly forbidden to freedive in the 12 hours after diving with scuba equipment! reaking this rule could increase the risk of decompression sickness! WARNINGS This computer is NOT intended for professional use! It is intended exclusively for recreational use. Any use that does not comply with the above could expose the diver to an increased risk of decompression sickness. Therefore it is not recommended for use in professional or commercial dives. heck the battery status before every dive. o NOT dive with the battery at 30% or lower. heck that the display shows no signs of malfunction and that it is clearly legible. Always check that the settings are correct for your dive, and never allow anyone else to tamper with the computer before the dive. If anyone else handles your computer, check that the settings are correct. It is important to keep in mind that our bodies undergo changes, even daily changes, that a computer cannot account for. If your physical condition is not excellent, or if you feel any physical problems, do not dive! It is important to avoid all behaviors that increase the risks associated with decompression sickness, such as rapid English 5

6 ascents, yo-yo dives, skipping mandatory decompression stops, dives with surface intervals that are too close together, and any other behavior that goes against common sense or your training. In any event, the instrument may not be used without sufficient preparation earned through specific training. Failure to observe the basic rules of scuba diving expose the diver to life-threatening risk. We recommend dives within the safety curve in order to reduce the risks associated with decompression sickness. We recommend dives of no deeper than 40 meters, or depending on the percentage of oxygen in the tank, ppo 2 max 1.4 AR. Exposure to higher values puts the diver's life in danger. Abide by the ascent rate recommended by the computer. Excessive ascent speeds put the diver's life at risk. The computer calculates the total ascent time, but this could be longer than the time shown depending on certain parameters that the computer calculates throughout the dive. Trying to ascend at the correct speed and abiding by the depths of the stops shown will help respect this duration. Always respect the NO FLY time: absolutely do not board an airplane if the NO FLY icon is still shown on the display. Remember to plan your last dive in the series keeping in mind the recommendations provided by AN (ivers Alert Network). Even if you abide by all the intervals dictated by hyperbaric medicine, the occurrence of decompression sickness on board a plane cannot be excluded after dives. ives with Nitrox mixtures. When setting the gas fraction in the tank, the computer will only accept whole numbers, so in the case of a verified gas fraction of 32.8, the next lower whole number must be set, and thus 32 in this case. o not round up to the next higher number because this would underestimate the nitrogen calculations. heck the ppo 2 max setting, and never exceed 1.4 AR. NEVER IVE without first checking the contents of the tanks with instruments that have been declared reliable. heck that the gas set on the computer corresponds to what is in the tank you'll be diving with. ives with Nitrox-Trimix-R require specific training. O NOT dive without the appropriate training. Exceeding the maximum recommended ppo 2 limit set dictates an ascent to lower levels, and in the case of a NS (entral Nervous System) value approaching the limit, reduced exposure to oxygen is recommended. Only use the dive computer after you have read all sections of the instruction manual and you have understood how it works. If you have any doubts or questions, contact your instructor or dealer before you dive. efore the dive It is crucial to understand that every diver is completely responsible for their own safety. ives using gas mixtures entail risks other than those associated with dives using standard air. Adequate training is necessary in order to learn to understand and avoid these risks, which are not immediately obvious. These risks include serious injury or death. 6 English

7 Limits of dive computers The computer reflects the most up-to-date guidelines on dive safety, but it must be stressed that the studies should be considered theoretical. Their aim is to reduce risk, but they cannot prevent the possibility of contracting illnesses associated with underwater activities: decompression sickness when scuba diving, and syncope/taravana/hemoptysis when freediving. are and maintenance Keep your computer clean and dry. o not expose the computer to chemical agents, including alcohol. Use only fresh water to clean your computer, removing all saline deposits. Leave the computer to dry naturally; do not use jets of hot or cold air. o not expose the computer to direct sunlight or sources of heat higher than 50. Store the computer in a cool (5-25 ) and dry place. o not place the computer in a hyperbaric chamber. The computer is designed for reading precision of +/- 2% (European standards require precision levels of +/- 3.5%). European standards require that the unit be checked periodically to monitor the precision of its depth and time readings. The warranty will be forfeited if the computer is opened by an unauthorized service center. The JAK computer is built to withstand use in sea water, but after the dive it must be rinsed thoroughly in fresh water and not exposed directly to sunlight or sources of heat to dry it. heck that there are no traces of humidity on the inside of the display. o not attempt to open, modify, or repair the computer yourself. Always contact an Authorized enter or SEA directly. English 7

8 TEHNIAL HARATERISTIS OF THE OMPUTER Hardware The computer is built with mixed materials: highly resistant technopolymer material, stainless steel, and mineral glass. The screen features a 100% dot matrix display with 80x80 pixel resolution and "Superright" LE backlighting. Special focus went into developing a navigation system that allows divers to access settings easily and intuitively. Sensor precision guarantee: 130 m. Maximum depth: 150 m / 500 ft (Sport edition). Precision of the Absolute Pressure Measurement. min max p = bar -20 mbar +20 mbar p = bar -40 mbar +20 mbar p = bar -100 mbar +20 mbar Maximum sensor error in the Temperature measurement: -2 / +6. When worn on the wrist, temperature detection out of the water is affected by body heat. For an accurate temperature reading, immerse the device in water or leave the device away from any sources of heat for a few minutes. ertification: The computer's hardware has obtained E and EN13319 certifications. Software Algorithm: The computer uses the ühlmann ZHL-16 model for scuba dives. Freedive algorithm: The computer uses the iptm (Individual Protection Taravana Model) for freedives. rief summary of Technical haracteristics SEA JAK Taravana Algorithm Hemoptysis Algorithm ata in Freedive mode Alarms Alarm type Yes (iptm) Yes Minimum recovery time suggested by Algorithm, Recovery time timer, Surf time, epth, ive time, ive number, Speed, Max depth, Water temperature, Time, Graph profile of last dive, Session summary with averages. epth set, constant steps, predefined steps, dive time, hydration. Audio + visual 8 English

9 SEA JAK ompass 3 compass, 1 resolution Outdoor functions Altimeter, arometer, Temperature, Weather forecast Pedometer Yes Fitness Functions Step counter, distance, speed, calories burned. SEA JAK SUA mode Yes (Scuba and Gauge) Mix 1 (Air or EAN) 21%-50% Adjustments for Yes, on 6 levels conservatism ecompression uhlmann ZHL-16 algorithm RM (Repetitive Yes ives Manag.) Safety stop Yes, in time and depth personalization eep stop Yes Last deco stop Yes personalization Planner No eco Limit + EO PLANNER SEA JAK acklighting acklighting activation mode isplay Ring nut material ase Lens Extension strap attery Logbook Maximum depth P/Mac connection Updates Superright LEs Standard timer, Manual on/off, Always on in the water. 100% dot matrix 80x80 pixel Stainless steel High-strength technopolymer Mineral Included Rechargeable Li-ion with US ~ 40 hours (dive time) ~ 2-3 months (as a watch) ~ 6-7 months (stand-by) ~ 18 freediving hours (samp. rate 1 sec) ~ 600 freedives ~ 160 scuba hours (samp. rate 10 sec) 150 m / 500 ft Yes, US interface included Yes (can be run by user) English 9

10 Recharging the battery JAK has a rechargeable Li-ion battery with no memory effect. The burn-time data provided may vary up to +/-15% depending on ambient temperature, device settings, applications installed, version of the operating system, backlight settings, and usage. Always fully charge the battery before using the computer the first time. harge the battery by connecting JAK to a US wall charger (not included) using the US cable provided. We recommend using a US wall plug (like those for smartphones/tablets) for charging JAK. If you decided to use a US port on a computer, make sure that the computer does not suspend power when it switches to standby mode. harging JAK from a computer is not recommended because the device might not charge fully. Even if JAK's next-generation battery has no memory effect, we still recommend charging the battery completely. Average charging time is 3-5 hours depending on the residual charge level. If the charge cycle doesn't finish, the battery indicator might not be exact until the next full charge. After installing an app or updating the operating system, we recommend that you run a full charging cycle. on't leave the JAK with a fully dead battery for a long time (e.g. 6 months); this can damage the battery. JAK will record an alarm if it is left uncharged for long periods, and this eventuality is not covered by the guarantee. Never dive if the computer shows a charge of 30% or less. When you connect the US charging cable, within 45 seconds the <= charging symbol will appear on the watch screen. harging is complete when the battery symbol disappears from the watch screen and sleep mode activates. Once the battery has charged, even if the device is left connected to electrical power, JAK automatically interrupts the flow of power. If you leave the computer charging longer than necessary (e.g., overnight), you may find it has switched to sleep mode. You can check the charge % of your JAK by pressing any button on the watch screen. 10 English

11 ives in especially cold water (<3 ) JAK can also be used for dives in especially cold water (<3 ). However, exposure to especially low temperatures can negatively affect the voltage remaining in the battery, decreasing the computer's burn-time. If you dive in especially cold water, the battery voltage can run out much faster than normal. Therefore it's always a good idea to recharge the battery before diving in extreme conditions. In the case of dives in especially cold water (<3 ), recharge the computer to 100% or ensure that you have at least a 50% charge. ives in especially cold water (<3 ) require specific training. English 11

12 JAK OUT OF THE WATER: Sleep Mode The JAK computer features a Sleep Mode function. After 1 minute of complete immobility (such as when set aside for the night), JAK will turn off its screen automatically to save battery. All the functions of the computer continue to function normally: alarm, desaturation (when needed), time, etc. Thanks to the built-in accelerometer, the screen will turn on automatically as soon as the computer detects any vibration or movement (no button need be pressed to turn on the screen). Sleep mode can be deactivated (not recommended) from the ISPLAY menu (see the dedicated section in this manual). Sleep mode Lock screen Vibration or movement Unlock A 12:30 Unlock Unlock Unlock 12 English

13 Lock screen After 60 seconds of inactivity in watch mode, the computer automatically activates lock mode. Push any button to unlock JAK. The computer is unlocked when the battery % is shown below the time screen. Lock screen JAK unlocked Unlock A Unlock acklighting A ompass and App Unlock 12:30 Unlock Watch mode menu 12:30 95% ive mode English 13

14 GAUGE JAK menu structure Select Select ISPLAY SYS SET P MOE Watch Menu OMPASS EFAULT INFO Watch Menu Activate backlight (only function of this button) Up own Up Exit Exit own A Select Start here. JAK unlocked 12:30 95% Watch IVE SET 1 IVE SET 2 FREE SET FREE ALARM ive menu MIX PLANNER LOGOOK ALARM Up own Up Exit Exit 54 NE-E-SE-S 200m mb ompass and Outdoor O 0.0 0:00 IVE m/min EPTH Scuba mode Select 0.0 0:00 IVE m/min EPTH Gauge mode HRONO MOON FITNESS LOK ALARM Exit App UP/exit/ own FREE 0.0 0:00 IVE m/sec EPTH Freedive mode ack to watch Select ive menu own 14 English

15 Unlock A Lock screen Unlock Watch screen When not diving, watch mode is considered the main screen for JAK. When navigating the menu, the computer will return automatically to the watch screen if no button is pressed for 60 seconds. Watch mode displays the following: Unlock 12:30 Unlock Large, in the center: Time in 24 hr or 12 hr format (the date format can be set from the SYS SET menu). Small, in the center: battery %. o not dive if the battery charge is lower than 30%. At lower left: date in dd/mm format (the date format can be changed to mm/ dd in the IVE SET 1 menu by selecting the Imperial system). acklighting A Watch mode menu JAK unlocked 12:30 95% ompass and App ive mode At lower right: ay of the week. Mo => Monday Tu => Tuesday We => Wednesday Th => Thursday Fr => Friday Sa => Saturday Su => Sunday English 15

16 Watch Menu The watch menu contains all settings not directly related to diving. To access the Watch Menu, unlock JAK by pressing any button, and press button from the watch screen. Press buttons and to scroll through the menu items, and press to select the desired option. Keep pressing to display the second menu page. To exit the menu, select the symbol, or simply don't press any buttons for 60 seconds. Activate backlight (only function of this button) Start here. JAK unlocked A Select OMPASS EFAULT INFO Up Exit own Select ISPLAY SYS SET P MOE Watch Menu Up own Exit 12:30 95% Watch Watch Menu 16 English

17 Select Next value ISPLAY SYS SET P MOE KL LEVEL: KL TIME: KL MOE: ONTRAST: SLEEP: EXIT 12:30 95% 5 3 MAN 0 1 JAK unlocked Increase value ecrease value ISPLAY (Screen settings) The settings for the JAK screen can be changed from the ISPLAY menu. Refer to the figure at left to navigate the ISPLAY menu. KL LEVEL: (0-10). Adjust the backlight power. Setting a very high value reduces JAK's battery time. KL TIME: (0-60). Adjust the duration of backlighting in minutes for AUTO mode. KL MOE: (AUTO-MAN-IVE). Set the backlighting mode. AUTO: acklighting deactivates automatically after a few minutes (KL TIME). MAN: acklighting is managed manually (one press to activate and one to deactivate). IVE: acklighting activates automatically and remains active throughout the entire dive. When not diving, it uses the AUTO settings. In the watch screen, regardless of the KL MOE and KL TIME settings, backlighting is deactivated after 3 seconds. ONTRAST: (0-7) Sets the intensity of the font contrast. Setting a very high value reduces JAK's battery time. SLEEP: (0-60) In minutes, indicates the elapsed time after which JAK activates SLEEP mode when immobile (a value of 0 deactivates the Sleep function). eactivating the Sleep function drastically reduces the computer's burn-time. To exit, select EXIT (or wait 60 seconds without pressing any button). English 17

18 Select Next value ISPLAY SYS SET P MOE 12:30 95% UT: 1:00 UT 2: 1:00 TIME: 12:30 FORMAT: 24 ATE: EXIT JAK unlocked Increase value ecrease value SYS SET (date and time) ate and time settings can be changed from the SYS SET Menu. UT (oordinated Universal Time): Adjusts the first home time zone. UT 2 (oordinated Universal Time): Adjusts the second time zone. Set UT and UT 2 with two different values to display double time zones on the JAK watch screen. Set the same UT value to display a single time. TIME: Sets the time (24hr format). FORMAT: Sets the time format displayed (24hr or 12 hr). To exit, select EXIT (or wait 60 seconds without pressing any button). UT 2 = UT UT 2 UT UT: 1:00 UT 2: 1:00 TIME: 12:30 FORMAT: 24 ATE: EXIT 12:30 95% UT: 1:00 UT 2: 4:00 TIME: 12:30 FORMAT: 24 ATE: EXIT 12:30 15:30 95% 18 English

19 P MOE (connected to P or Mac) P MOE is used to connect JAK to ivelogger on P or Mac. Select ISPLAY SYS SET P MOE JAK unlocked 12:30 95% To download ivelogger and connect JAK to P or Mac to download dives and run updates, connect to: An internet connection is required to download the program and download updates. ivelogger and updates are completely free. However, you will need an internet connection in order to download the software. If you use a metered connection, your internet service provider could charge you for the data traffic generated. We always recommend an ASL Flat connection for accessing the Internet. ontact your Internet provider for more information. P MOE S/N To exit, press the button (automatic exit after 60 seconds is not active in P MOE). REAY Exit EXIT English 19

20 OMPASS (ompass Settings) ompass settings can be changed from the OMPASS Menu. JAK unlocked 12:30 95% ISPLAY SYS SET P MOE OMPASS EFAULT INFO ELIN: eclination is used to compensate for the difference between geographic north and magnetic north. You can obtain this information from special websites. (If you don't know how to set the ELIN value, leave it at 0.0). IR: (EAST or WEST) The direction is used to indicate the direction of the declination of earth's magnetic field. (If you don't know how to set the IR value, leave it set to EAST). ALI: (alibration) Press or to start calibrating the compass. To calibrate correctly, stay away from sources of magnetic fields (computers, televisions, light poles, etc.). ELIN: IR: ALI: 0.0 EAST START onfirm Next value EXIT onfirm Rotate on a flat surface, slowly and constantly. Rotate on the horizontal axis, slowly and constantly. To exit, select EXIT (or wait 60 seconds without pressing any button). 20 English

21 Reset to efault (reset to factory defaults) To navigate the menu, follow the instructions in the figure at left. JAK unlocked 12:30 95% ISPLAY SYS SET P MOE OMPASS EFAULT INFO SETTINGS: Yes/No. Reset all menu items to factory defaults. The SETTING command resets all menus and settings (MIX, Alarms, etc.). It does not reset the diver's tissue saturation. TISSUES: Yes/No. Resets the diver's tissue saturation. o not reset the tissue saturation for ANY REASON if the device is being used by the same person. This prevents JAK from running the correct decompression calculation. EXEUTE: Resets all items set to YES. (Select the EXEUTE function and press the button to run the reset). onfirm WARNING!!! RESET? SETTINGS: NO TISSUES: NO EXEUTE YES/ NO YES/ NO ANGER! o NOT perform the tissue saturation reset (TISSUES=YES) if the device will be used by the same person! This can lead to the risk of accidents, including fatal ones. The tissues can only be reset if the JAK device will be used by a person who has not taken any dives in the previous 48 hours. Any tissue reset is recorded permanently in JAK's dive logbook. The user takes full and complete responsibility for a tissue saturation reset. English 21

22 INFO The INFO Menu shows the information about the JAK unit. JAK unlocked 12:30 95% ISPLAY SYS SET P MOE OMPASS EFAULT INFO Full model name: SEA - JAK. Y/N: Unit serial number. APOS: Version of the operating system installed on the unit. To exit, select (or wait at least 120 seconds without pressing any buttons). SEA JAK S/N: APOS 4.0.0/011 Exit Made in Italy 22 English

23 ive menu The ive menu contains all the settings directly related to the dive. To access the ive Menu, unlock the JAK by pressing any button, and from the watch screen press the button to access the dive screen. Then press the button to access the dive menu. Press the and buttons to scroll through the menu items, and press the button to select the desired option. Keep pressing to display the second menu page. To exit the menu, select the symbol, or simply don't press any buttons for 60 seconds. Start here. JAK unlocked 12:30 95% Watch O 0.0 0:00 IVE m/min EPTH ive menu Select IVE SET1 IVE SET2 FREE SET FREE ALARM ive menu UP own Select MIX PLANNER LOGOOK ALARM Up Exit own ive menu English 23

24 IVE SET 1 (ive settings 1) The IVE SET 1 Menu displays the first part of the JAK dive settings. JAK unlocked 12:30 95% O 0.0 0:00 IVE m/min EPTH IVE SET1 IVE SET2 FREE SET FREE ALARM WATER: (SALT/FRESH): Select the water type (SALT/FRESH). NOTE ive computers measure pressure and convert it to depth using water density as a constant. Without the WATER adjustment, a depth of 10 m in salt water is detected as 10.3 m in fresh water. Without the SALT/FRESH setting, the depth reading could be distorted. UNITS: Select the unit of measure you want to use: m/ = meters and degrees elsius (date format dd/mm/yy). ft/ F = feet and degrees Fahrenheit (date format mm/dd/yy). MOE: Set the preferred dive type that JAK will activate upon entering the water. Always check that the dive type matches the dive actually being taken. WATER: UNITS: MOE: P.SAFE: SALT m/ FREE 0 onfirm SUA: JAK begins a dive in scuba mode with tanks. GAUGE: JAK begins a dive in gauge mode. FREE: JAK begins a dive in freedive mode. NOTE If you should wish to use a different mode without changing the MOE parameter, you can enter the desired mode by pressing the button from the watch screen and taking a dive deeper than 2 m. This way, JAK will activate the mode that you selected without changing the MOE value for that one dive. Next value EXIT onfirm For safety reasons, it is NOT possible to set FREE mode as the main mode unless 12 hours have elapsed since the most recent SUA or GAUGE dive. JAK automatically resets SUA mode if you attempt to force an exit with the main mode set to FREE. 24 English

25 12:30 O 0.0 0:00 IVE m/min EPTH IVE SET1 IVE SET2 FREE SET FREE ALARM P.SAFE: Level of conservativism (O = Open ircuit ive). The JAK (in O mode) uses the ühlmann ZHL-16 algorithm for the decompression calculation. The conservatism of the JAK can be changed among preset levels from 0 to 5. The levels correspond to the following values: ühlmann ZHL-16 (gradients) GFL/GFH 0 = 93/93 1 = 90/90 standard conservatism 2 = 80/80 3 = 75/75 4 = 30/90 max linear conservatism 5 = 20/89 Use only in scuba mode WATER: UNITS: MOE: P.SAFE: SALT m/ FREE 0 onfirm NOTE Higher conservatism will ensure that the computer will perform calculations more cautiously, decreasing the time that can pass between a given depth without exiting the safety curve (or by extending the decompression time in the case of dives with deco stops). In general it is a good idea to increase the conservatism if you noticed excessive fatigue after your most recent dive. A hyperbaric physician can recommend how to set the conservatism, depending on your clinical status. EXIT onfirm English 25

26 12:30 95% Next value JAK unlocked O 0.0 0:00 IVE m/min EPTH S.S. PT: S.S. TIME: EEP STOP: LAST STP: EO TRL: EXIT 3 5 OFF 3 ON IVE SET1 IVE SET2 FREE SET FREE ALARM - + IVE SET 2 (ive settings 2) The IVE SET 2 Menu shows the second part of the JAK dive settings. S.S. PT: (Safety Stop epth) (3-9): epth at which you want to do your Safety Stop. S.S. TIME: (Safety Stop Time) (OFF-9): uration of the Safety Stop in minutes. Use only in scuba mode Although it is always recommended that you perform a Safety Stop for all dives taken within the no-decompression limits, you can deactivate the Safety Stop by setting the value S.S. Time to OFF). EEP STOP (OFF/ST): If enabled, this introduces an additional non-obligatory stop with the Standard method (ST) (half of the maximum depth for 2.5 minutes). LAST STP: (Last Stop) (1-10): epth at which you wish to take the last decompression stop (only if the dive is outside the no-deco limit and requires deco stops). EO TRL: (ON/OFF): If enabled (ON), JAK will not permit any new dives in the 12 hours following a dive in which any significant deco violations occurred. isabling (OFF) the EO TRL is not recommended, and will be permanently recorded in the JAK Logbook. The Safety Stop is considered a NON obligatory stop to be taken during dives within the no-deco limits. Violating the Safety Stop does not entail decompression penalties for subsequent dives and is not considered a deco violation. Therefore, O NOT disable the EO TRL if you intend to skip the Safety Stop. The Safety Stop is omitted automatically if the decompression profile falls outside the no-decompression limits. Even if any decompression that may have been accumulated is cleared before the safety stop depth, the dive is still not considered to be within the no-deco limits, and thus JAK will not offer the Safety Stop. 26 English

27 JAK unlocked FREE SET (Freedive Settings) The FREE SET Menu displays the freediving settings on the JAK. Use only in the freedive function 12:30 95% O 0.0 0:00 IVE m/min EPTH IVE SET1 IVE SET21 FREE SET FREE ALARM T LEVEL: (Taravana conservativism level) (0-9): hanges the personal conservativism coefficient in calculating the minimum recovery time to reduce the risk of Taravana. Increasing the T LEVEL factor entails an increase in the minimum recovery time recommended between one freedive and the next. 1 = Minimum conservatism 9 = Maximum conservatism 0 = Function deactivated Set the conservatism taking into account your own athletic condition. Next value T LEVEL: 1 T PROF: AUTO T MOE: SINGLE OEEMA: 0 EXIT + - T PROF: (Type of dive) (AUTO - V- U): Indicates the type of dive you intend to take to make it possible to optimize the Taravana risk reduction algorithm. V (V Form) = ive with brief bottom time and body in constant motion (typical of recreational freedivers). U (U Form) = ive with extended bottom time and body immobile (typical of freediving fishermen). AUTO = Automatic detection of the form of each individual dive (recommended). T MOE (Taravana Mode) (SINGLE - MULTI): SINGLE: The recommended recovery time is based solely on the last dive taken. MULTI: The recommended recovery time is based on the latest dive and on previous dives, and entails an increase in the recommended recovery time if the recovery time for previous dives was not respected. English 27

28 JAK unlocked OEEMA: (Pulmonary Oedema): epth you intend to reach, or the comfort depth (depth reachable without special effort), based on which the computer will calculate the preparatory dives required to reduce to a minimum the risk of pulmonary oedema. Use only in the freedive function 12:30 95% O 0.0 0:00 IVE m/min EPTH IVE SET1 IVE SET21 FREE SET FREE ALARM If 0 = disabled If the OEEMA function is active, the first three warm-up dives are not considered in calculating the session average. For more information on preventing pulmonary oedema/hemoptysis, see the dedicated chapter in this manual. Next value T LEVEL: 1 T PROF: AUTO T MOE: SINGLE OEEMA: 0 EXIT - + FREE 0:00 1:10 1:30 0.0m 0.0m 0.0m Surf 0:05 Surf Time 0:08 ive to 8m ive to 16m Time ive to 24m IVE IVE IVE m/sec m/sec m/sec EPTH EPTH EPTH English

29 12:30 95% JAK unlocked Next value O 0.0 0:00 IVE m/min EPTH TYPE: FIXE EPTH 1: 10 EPTH 2: 20 EPTH 3: 30 MOE ES TIME: 0:00 EXIT IVE SET1 IVE SET21 FREE SET FREE ALARM + - FREE ALARM (Freedive Warning) The FREE ALARM Menu allows you to set auditory warnings in freedive mode. TYPE: (OFF - FIXE - STEP - TIME) Sets the desired alarm type. If TYPE = OFF No alarm is activated. If TYPE = FIXE An auditory alarm is activated upon reaching each of the three thresholds set manually by the user. EPTH 1: Activation depth of the first alarm. EPTH 2: Activation depth of the second alarm. EPTH 3: Activation depht of the third alarm. MOE: (ES - AS - OTH): hanges the alarm activation preferences. ES = Alarm activation at the preset threshold set during the descent only. AS = Alarm activation at the preset threshold during the ascent only. OTH = Alarm activation at the preset threshold in both descent and ascent. ES ES ES AS Use only in the freedive function ES OTH alarm in descent only alarm in ascent only alarm in both descent and ascent TIME: An additional auditory alarm is activated upon reaching the time set (mm:ss) (if 0:00, time alarm deactivated). English 29

30 If TYPE = STEP An auditory alarm is activated every X meters. Next value TYPE: START: STEP: TIME: EXIT STEP : START: epth of the first alarm beyond which the STEP alarms are activated. STEP: Indicates every how many meters (or feet if the Imperial system is set) the alarm will be activated. Example (START=10, STEP=5) Alarm 1 = 10 m Alarm 2 = 15 m Alarm 3 = 20 m Alarm 4 = 25 m. etc In STEP mode the alarm is only activated during the descent. TIME: An additional auditory alarm is activated upon reaching the time set (mm:ss) (if 0:00, time alarm deactivated). TYPE: TIME: TIME 0:00 + If TYPE = TIME An auditory alarm is activated when the set time is reached (mm:ss) (if 0:00 time alarm is deactivated). Next value EXIT - 30 English

31 JAK unlocked 12:30 95% O 0.0 0:00 IVE m/min EPTH MIX PLANNER LOGOOK ALARM MIX (ive Mix Settings) The MIX Menu shows the mix settings that will be used during the dive. With the O (Open ircuit) function, JAK can use 1 Mix with oxygen % from 21% to 50%. Use only in scuba mode hanging these settings requires special training on the use of enriched breathing mixes. If you have not received this training, do not dive with enriched breathing mixes! o not dive using breathing mixes other than those set in your diving computer. Using mixes other than those set makes it impossible to calculate the decompression correctly! MIX: PPO2 MO: MIX MIX: (21-50): Indicates the oxygen % in the mix inside the tank. PPO 2 : (Oxygen partial pressure) ( ): Indicates the maximum PPO 2 with which you intend to use the mix. MO: Maximum operating depth for the mix currently created. The MO is recalculated automatically every time the MIX, or PPO 2 value, is modified. The MO cannot be changed manually. uring the dive, an auditory alarm will be activated upon reaching the MO depth. Next value EXIT - English 31

32 IVE m/min EPTH JAK unlocked 12:30 95% O 0.0 0: MIX PLANNER LOGOOK ALARM PLANNER (within no-deco limits) JAK integrates a complete planner for square profile dives. Warning: To change the dive parameter, set up JAK as desired from the IVE SET menu and the MIX menu; the computer will simulate the dive using the settings currently in place. O PLANNER EPTH: TIME: EPTH: Enter the maximum planned depth for the dive. TIME: Enter the bottom time for the dive in minutes. EVALUATE: Launch the dive simulation (select with and press ). EVALUATE Next value EXIT - If the dive is within the no-decompression limits (no deco stops required). NL: No decompression time left (after the bottom time set). Exit O PLANNER NL: NS: OTU: MIX QT: 560L NS: % of accumulated NS (after the bottom time set). OTU: % of OTU accumulated (after the bottom time set). MIX QT: Mix volume in liters anticipated to be required for the dive. The amount of gas consumed is only approximate, and refers to standard consumption. Work from the instructions provided in your own training about the amount of gas you need during the dive. 32 English

33 IVE m/min EPTH JAK unlocked 12:30 95% Next value Exit EPTH: TIME: O 0.0 0: O PLANNER EVALUATE EXIT PT T RT MIX MIX PLANNER LOGOOK ALARM - + Next page Previous page PLANNER (deco planner) JAK integrates a complete planner for square profile dives. In order to change the dive parameters, set up the computer the way you want it in the IVE SET menu and the MIX menu. JAK will simulate the dive using the current settings. For EPTH, Time and Evaluate refer to No-eco Planner (previous page). If the dive is NOT within no-decompression limits (deco stops called for): PT: epth of the decompression stop in meters (in feet if Imperial units are set). T: Stop time, expressed in minutes. RT: Time elapsed from the beginning of the dive to the deco stop. MIX: Mix used during the deco stop. In addition to the deco stops, the final value shown will always be the information about the end of the bottom time (in the example at left, /0). Press and to scroll through the pages if there are more than 3 deco stops. The planner assumes 18 m/min as the descent rate and 9 m/min for ascent rate in decompression calculations. The Planner function does not run the validation of the profile, that is, it does not take into account a possible excess of NS, limitations on the volumetric availability of the mixes, a possible isobaric counterdiffusion due to a change of mixes or the MO of a mix used. Adequate training is necessary in order to best plan a technical dive. onsult your instructor or your training agency if you have any questions about planning. For graphic formatting reasons for the Planner, the maximum T displayed is 99 minutes. If an individual decompression stop turns out to be longer than 99 minutes, it will be shown in the planner as 99. uring the dive however, the stop will be shown with the time displayed in full (e.g. 120 min). English 33

34 LOGOOK JAK unlocked 12:30 95% O 0.0 0:00 IVE m/min EPTH MIX PLANNER LOGOOK ALARM The JAK omputer can store approximately 18 hours of dives in freedive mode (about 600 dives), with a sample rate of 1 second, or approximately 160 hours of diving in open circuit mode (sample rate 10 seconds). The data saved in JAK's Logbook can be downloaded to a Mac or P using the US cable included in the package and the ivelogger software, which can be downloaded from (see the dedicated chapter). Log number ate Graphic profile Maximum depth Exit LOGOOK Scuba type dive Level of conservativism #10 PS1 Previous log ate # : : m : ive Maximum 25.4m T 1:21 21%O2 6%NS duration depth FREE ST 3:20 Next log ive start time Log number Graphic profile Exit LOGOOK Freedive type dive Water temperature Previous log ive duration Session start time Next log Mix used ive type % NS Surface time before the dive 34 English

35 JAK unlocked ALARM (Open ircuit Alarms) The ALARM Menu allows you to enable (YES) or disable (NO) JAK's auditory alarms in open circuit mode. Use only in scuba mode 12:30 95% O 0.0 0:00 IVE m/min EPTH MIX PLANNER LOGOOK ALARM Except for special situations, we do not recommend disabling auditory alarms. We recommend leaving all values set to YES. AS SPEE: (YES/NO): Alarm that signals an excessive ascent rate. MAX EPTH: (YES/NO): Alarm that signals that the MO has been exceeded (depth beyond which you should not proceed, based on the PPO 2 of the breathing mix in use). Next value AS SPEE: YES MAX EPTH: YES EO VIOL: YES TIME: 0 EPTH: 0 EXIT - + EO VIOL: (YES/NO): Alarm that signals a violation of the mandatory decompression stop. (The Safety Stops and eep Stops are not considered mandatory decompression stops. Violating Safety Stops or eep Stops does not activate the alarm). TIME: Alarm that signals that the dive time set has been exceeded (in minutes). EPTH: Alarm that signals that the depth set has been exceeded (in meters or feet - see the IVE SET menu). English 35

36 JAK unlocked 12:30 95% 54 NE-E-SE-S 200m mb 54 NE-E-SE-S 200m mb App / exit Set the route The ompass In order to access the compass screen, press the button. The compass is also available during the dive. If the ALIRATE message appears, or if the compass is not fluid or functioning correctly, the compass needs to be calibrated. To calibrate the compass, refer to the OMPASS section of this manual. The JAK compass has a resolution of 1 and an accuracy of +/- 1. The tilt is compensated automatically up to 85. After rotating your arm, it may take a few seconds for the compass to find the correct alignment again. To set the route, press the button. While navigating, JAK considers the direction to be on route if the desired route diverges no more than 5 from the direction set. To exit the compass, press the button twice. <= => (irection in degrees highlighted in black): irection on route (+/-5 with respect to the value set with. (irection in degrees not highlighted): Indicates which direction to go to find the route set. (irection in degrees not highlighted, no arrow shown): Exact inverse of the direction set. ompass graphics legend: N: North S: South W: West E: East NE: Northeast NW: Northwest SE: Southeast SW: Southwest 36 English

37 JAK unlocked 12:30 95% 54 NE-E-SE-S 200m mb Weather Forecast The weather forecast is based on monitoring atmospheric pressure in the previous 18 hours using the built-in barometer. For a reliable weather forecast, no changes in elevation should be made. Otherwise the change in atmospheric pressure due to the change in altitude could introduce inaccuracies into the weather forecast. After the dive, because of humidity in the sensor area, the pressure actually read could be lower than the true pressure, which could compromise the correct weather forecast. Following a change in altitude of ~ 50 m, the weather forecast will be reliable again after 3-5 hours. Weather stable at current conditions 54 NE-E-SE-S 200m mb App / exit Possible deterioration Possible improvement English 37

38 JAK unlocked 12:30 95% 54 NE-E-SE-S 200m mb 54 NE-E-SE-S 200m mb App / exit Altimeter, arometer, Thermometer Altimeter: (In the center, expressed in meters or feet) Indicates the altitude above sea level. The value of the height above sea level is calculated based on atmospheric pressure. Warning: the accuracy of the altitude measurement depends directly on the atmospheric pressure and humidity present in the sensor location. Therefore, in the event of bad weather, or after a dive, the error could be as much as +/-80m. Thermometer: (At lower left, expressed in or F): Indicates the temperature of the JAK case. The temperature measured by JAK is the temperature of the watch case itself. Therefore, when worn on your wrist it will measure a temperature higher than the outside temperature. To measure the ambient temperature, remove the watch from your wrist and wait at least 5-6 minutes. The temperature reading will be accurate in the water after 3-4 minutes. arometer: (At lower right, expressed in millibars) Indicates the atmospheric pressure (the pressure present at any point in earth's atmosphere). The barometer reading is used to automatically adapt the decompression calculation for dives at altitude. Therefore it isn't necessary to enter the dive altitude in the settings (which the calculator would use to calculate a hypothetical atmospheric pressure to use in adapting the decompression calculation), because JAK automatically detects the true barometric pressure regardless of the altitude. 38 English

39 Apps for JAK Free JAK unlocked 12:30 95% 54 NE-E-SE-S 200m mb Select UP /exit/ HRONO MOON FITNESS LOK ALARM Exit own JAK has some applications installed. To access them, press the button (after you have navigated to the compass screen). Select Exit to leave the App menu, or press the button with the first available app selected. Select HRONO MOON FITNESS LOK ALARM Exit UP /exit/ own English 39

40 JAK URING THE IVE JAK automatically activates dive mode when the diver moves past 1.5 m in depth. The factory setting for JAK is in Freedive mode, however you can select the mode to be activated in the IVE SET 1 menu. Freediving The following diagram shows the information shown during freedives. Activate backlighting Surface functions urrent depth Number of dives taken A 0.0m SURF TIME FREE 1:25 4 : 20 IVE m/sec EPTH Last dive run time Surface time Maximum depth (reached in the last dive) Last dive graphic profile urrent speed (descent or ascent) Activate backlighting urrent depth A uring the dive FREE 31.2m 1:25 IVE m/sec EPTH Run time Number of dives Maximum depth urrent speed (reached in the last dive) (descent or ascent) Temperature 0.0m 1:25 TEMP TIME :30 FREE Standard Time 0.0m 1:25 TST 54:30 Total session time Total time for the freedive session. TIME FREE 14:30 Standard Time FREE 0.0m 1:25 SESSION ATA MAX PT: 33.4 MAX TIME: 3.01 PT AVG: 15.5 Tm AVG: 2.14 STm AVG: 10.4 Info on the session Maximum depth Maximum dive time Average depth Average dive time Average surface time 40 English

41 Reducing the risk of Oedema / Hemoptysis This manual is not a scientific text and is no replacement for adequate training! Hemoptysis is technically the emission of blood from the respiratory tracts, and when freediving this typically indicates the presence of a pulmonary oedema. uring a freedive, hemoptysis is typically caused by a rupture of capillaries in the lungs that have been subjected to too much stress without having first performed the appropriate warmups. To reduce the risk of pulmonary oedema, JAK recommends which dives to take first in order to warm up the capillaries in the lungs depending on the depth you want to reach, or the comfort depth (depth you can reach without special effort). To activate the oedema/hemoptysis risk reduction function, set the desired depth in the OEEMA item in the FREE SET menu. In the following example, the OEEMA value is set to 35. The first three warm up dives are not counted when calculating the session averages. o not exceed 8 m in depth o not exceed 16 m in depth o not exceed 24 m in depth FREE 0:00 1:10 1:40 0.0m 0.0m 0.0m Surf 0:05 Surf Time 0:08 ive to 8m ive to 16m Time ive to 24m IVE m/sec EPTH IVE m/sec EPTH IVE m/sec EPTH FREE FREE English 41

42 Reducing the risk of Taravana This manual is not a scientific text and is no replacement for adequate training! Taravana ( madness in Polynesian) is a syndrome with symptoms comparable to severe decompression sickness in scuba diving and include trouble with speech and walking around, and in the most severe cases, convulsion problems through to possible coma. Hyperbaric medicine it not unanimous in identifying the causes that trigger the syndrome. Nevertheless, the recognized factors that increase the risk of Taravana are: Lengthy stays at very deep levels with repeated dives over time (2-4 hour sessions). Exposure to deep levels without adequate recovery time on the surface. Hypoxia (Insufficient oxygen in the body). ehydration. Taking into consideration all the possible causes that can trigger the syndrome, after every dive JAK suggests the minimum Recovery time (REOVERY) before beginning the next dive to reduce the risk of Taravana. The variables can be set from the FREE SET menu in JAK (see dedicated section in this manual). After every dive, JAK shows the minimum recommended recovery time (REOVERY in small text). If the minimum recovery time has not yet elapsed, the SURF TIME information is highlighted in LAK. When the surface time surpasses the minimum recommended recovery time, the Surf Time value is shown against a neutral background. 0.0m SURF TIME FREE 1:25 1 : 33 REOVERY 4:14 IVE m/sec EPTH Time on the surface, REOVERY not yet elapsed Minimum recommended recovery time 0.0m SURF TIME FREE 1:25 4 : 20 IVE m/sec EPTH English

43 Hydration alert On the basis of the number of dives taken, their duration, and the depths reached, the computer will display the HYRATE alert to remind the freediver to hydrate (even when the body has not yet noticed the need). There is no need to press any button after having rehydrated. The alert will be removed automatically by the next dive. Warning: We counsel strongly against ignoring the hydration warning. 0.0m SURF TIME HYRATE FREE 1:25 4 : 20 IVE m/sec EPTH Hydration alarm English 43

44 ive in SUA mode (O) This manual does NOT replace adequate training! The diagram below shows the information shown during a dive with scuba equipment: O 20.0m 5:25 NL 36 : %O2 m/min MAX { Principal information urrent depth (at left): Expressed in meters or feet. Run time (at right): ive time in minutes: seconds. ive mode (at upper right): O = Open ircuit. { If within limits: NL: (No ecompression Limit) Time in minutes it's possible to stay at the current level without exceeding the no decompression limits and make mandatory deco stops necessary. As a general rule of thumb, it's always a good idea to remain within the no-decompression limits. O 9.0m 30:15 STOP TIME 4 : 3 : 3 : TTS %O2 MAX { If you exceed the limits: TTS: (Left) Time-to-surface. Total ascent time. STOP: (enter) epth of the next mandatory stop. TIME: (Right) Minutes relative to the next safety stop. 44 English

45 O O 5.9m 30:15 STOP NL 3 : 5 : 99 : SFT %O2 21 MAX 37.4 { This manual does NOT replace adequate training! Safety Stop: In the event that a Safety Stop has been set (recommended), it will be shown on the display in the center line of the computer during the ascent, beginning at a depth of 9 m. (The safety stop is omitted automatically when the dive exceeds the no-decompression limits). You can change the time and depth of the safety stop in the IVE SET 2 menu. SFT: (Left) Time left to spend in the safety stop. STOP: (enter) epth of the stop. NL: (Right) No ecompression Limit. If the eep Stop is enabled: If you set the eep Stop function, it will be displayed 5 m before the actual depth required in the central line on the display, and will be removed (if not performed) 5 m after the depth required. 19.2m 28:15 EEP STOP NL 2 : 15 : 10 : %O2 MAX { If the eep Stop is performed during a dive within the no-decompression limits, the NL time will remain visible on the right side of the display against a black background. The EEP info is shown to the left in minutes. In the middle STOP indicates the depth. 20.2m TTS EEP 6 : 19 : 21 O 30:15 STOP 2 : %O2 MAX 38.4 { If the eep Stop is done in a dive with mandatory decompression stops, the eep Stop information will be shown against a neutral background in place of the STOP and TIME values, leaving the TTS value visible against a black background.. English 45