Suunto Gekko User Manual
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Suunto Gekko User Manual

Diving computer
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SUUNTO
GEKKO
USER'S GUIDE

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  • Page 1 SUUNTO GEKKO USER’S GUIDE...
  • Page 2 Quick reference guide Gekko...
  • Page 3 200 dives (whichever comes fi rst). EN 13319 EN 13319 “Diving accessories - Depth gauges and combined depth and time measuring devices - Functional and safety requirements, test methods” is a European diving depth gauge standard. The GEKKO is designed to comply with this standard.
  • Page 4 ISO 9001 SUUNTO Oy’s Quality Assurance System is certifi ed by Det Norske Veritas to be according to the ISO 9001 in all SUUNTO Oy’s operations (Quality Certifi cate No. 96-HEL-AQ-220). SUUNTO Oy does not assume any responsibility for losses or claims by third parties, which may arise through the use of this device.

  • Page 5: Warnings

    NOT FOR PROFESSIONAL USE! Suunto dive computers are intended for recreational use only. The demands of commercial or professional diving may expose the diver to depths and exposures that tend to increase the risk of decompression illness (DCI).
  • Page 6 SUUNTO STRONGLY RECOMMENDS THAT SPORT DIVERS LIMIT THEIR MAXIMUM DEPTH TO 40 M [130 FT] OR TO THE DEPTH CAL- CULATED BY THE COMPUTER BASED ON THE SELECTED O A MAXIMUM PO DIVES WITH REQUIRED DECOMPRESSION STOPS ARE NOT RECOM- MENDED.
  • Page 7 in chapter 3.5.3. “Flying After Diving”. There can never be a fl ying after diving rule that is guaranteed to completely prevent decompression illness! THE DIVE COMPUTER SHOULD NEVER BE TRADED OR SHARED BETWEEN USERS WHILE IT IS IN OPERATION! Its information will not apply to someone who has not been wearing it throughout a dive or sequence of repetitive dives.
  • Page 8 SET THE CORRECT PERSONAL ADJUSTMENT MODE! Whenever it is believed that factors that tend to increase the possibility of DCI exist, it is recommended that you use this option to make the calculations more conser- vative. Failure to select the correct Personal Adjustment setting will result in erroneous dive and planning data.

  • Page 9: Table Of Contents

    1.1.3. Nitrox ...10 2. GETTING ACQUAINTED ...12 2.1. FUNCTIONS ...12 2.2. PUSH BUTTONS ...12 2.3. WATER CONTACTS ...14 3. DIVING WITH THE GEKKO ...15 3.1 BEFORE DIVING ...15 3.1.1.Activation and Prechecks ...15 3.1.2.Battery Indication ...17 3.1.2.1.Battery Power Indicator ...17 3.1.3. Dive Planning [PLAN] ...18 3.1.4.
  • Page 10 5.3. MAINTENANCE ...47 5.4. WATER RESISTANCE INSPECTION ...47 5.5. BATTERY REPLACEMENT ...48 6. TECHNICAL DESCRIPTION ...52 6.1. OPERATING PRINCIPLES ...52 6.2. SUUNTO REDUCED GRADIENT BUBBLE MODEL (RGBM) ...54 6.3. OXYGEN EXPOSURE ...55 6.4. TECHNICAL SPECIFICATION ...55 7. WARRANTY ...59 8. SUUNTOSPORTS.COM ...60 8.1.

  • Page 11: Introduction

    It is a signifi - cant advance on the classic Haldane models, which do not predict free gas. The advantage of Suunto RGBM is additional safety through its ability to adapt to a variety of situations and dive profi les.

  • Page 12: Emergency Ascents

    If you have any questions about the manual or the dive computer, contact your SUUNTO dealer before diving with the dive computer. Always remember that YOU ARE RESPONSIBLE FOR YOUR OWN SAFE- When used properly, the dive computer is an outstanding tool for assisting prop- erly trained, certifi...
  • Page 13 However, when the gas mix is altered, the oxygen content of the mix is generally increased. This increase exposes the diver to an oxygen toxicity risk not usually considered in recreational diving. In order to manage this risk, the dive computer tracks the time and intensity of the oxygen exposure and provides the diver with information to adjust the dive plan in order to maintain oxygen exposure within reasonably safe limits.

  • Page 14: Getting Acquainted

    2. GETTING ACQUAINTED 2.1. FUNCTIONS The Suunto GEKKO can be set to function as a regular air dive computer or as a nitrox dive computer. The GEKKO features two dive computer models (AIR, NITROX), three main operating modes (TIME/STAND-BY, SURFACE, DIVING), two menu based main modes (MEMORY, SET) and seven menu based submodes (review separate Quick Reference Guide).
  • Page 15 Press the SMART (MODE) button • To activate the dive computer. • To change from the Surface Mode to the menu based modes. • To select, confi rm or quit a submode (short press). • To immediately exit any submode to the Surface Mode (long press).

  • Page 16: Water Contacts

    Fig 2.3. Depth sensor (A), water/data transfer contacts (B). Fig. 2.4. Active water contacts are indicated by the text AC. 2.3. WATER CONTACTS The water contacts control the automatic activation of the Dive Mode. The water and data transfer contacts are located on bottom of the case (Fig 2.3).

  • Page 17: Diving With The Gekko

    3. DIVING WITH THE GEKKO This section contains instructions on how to operate the dive computer and interpret its displays. You will fi nd that this dive computer is easy to use and read. Each display shows only the data relevant to that specifi...
  • Page 18 ° DIVE TIME Fig 3.3. Startup III. Surface mode. Depth and dive time are zero, current tempera- ture, 20 °C. Pressing TIME button activates alternative display of current time. ° DIVE TIME Fig. 3.4. Low Battery Warning. Battery symbol indicates that the battery is low and battery replacement is recommended.

  • Page 19: Battery Indication

    3.1.2. BATTERY INDICATION 3.1.2.1. Battery Power Indicator This dive computer has a unique graphic Battery Power Indicator designed to give you an advance notice of impending need to change the battery. The Battery Power Indicator can always be seen when the Dive Mode is activated. The following Table and Figure show the various warning levels.

  • Page 20: Dive Planning [Plan]

    3.1.3. Dive Planning [PLAN] To enter Planning Mode, press the PLAN button at any time during Surface Mode. After showing the text “PLAN” (Fig. 3.5.), the display will show the no-decompres- sion limit for the depth of 9 m [30 ft]. By pressing the down arrow (t) (TIME) button, the dive computer will calculate and show the next deeper no-decompres- sion limits in 3 m [10 ft] increments ending at 45 m [150 ft].

  • Page 21: User Defi Nable Functions And Alarms

    3.1.4. User Defi nable Functions and Alarms The GEKKO has several user defi nable functions and depth and time related alarms that you can set according to your personal preference. The dive computer model (Air/Nitrox) can be set in the MODE- SET- MODEL submode.

  • Page 22: Diving With The Gekko

    TIME your next dive. 3.3. DIVING WITH THE GEKKO The GEKKO has two operating modes: Air mode for diving with standard air only and Nitrox mode for div- ing with oxygen enriched (EANx) mixtures. The Ni- trox mode is enabled in the MODE-SET-MODEL.

  • Page 23: Bookmark

    All information on the display is labeled (Fig. 3.6). During a no-decompression stop dive, the following information will be displayed: your present depth in meters [ft] the maximum depth during this dive in meters [ft], indicated as MAX the available no-decompression time in minutes in the center window as NO DEC TIME and as a bar graph on the left side of the display.

  • Page 24: Consumed Bottom Time (Cbt)

    As your body absorbs more nitrogen, more segments start to appear. Green Zone - As a safety precaution Suunto recommends you should maintain the no-decompression bar graph within the green zone. Segments start to appear when the available no-decompression time decreases below 100, 80, 60, 50, 40, 30 and 20 minutes.

  • Page 25: Decompression Dives

    When the maximum allowed ascent rate is exceeded, the fi fth SLOW warning segment and the STOP sign appear and the depth reading starts to blink, indicating that the maximum ascent rate has been exceeded continuously or that the current ascent rate is signifi...
  • Page 26 CEILING STOP ° DIVE TIME Fig. 3.14. Violated Manda- tory Safety Stop. Downward pointing arrow and an audible alarm indicate you should descend to ceiling zone. CEILING ASC TIME ° DIVE TIME Fig. 3.15. Decompression dive, below fl oor. Upward pointing arrow, blinking ASC TIME label and an audible alarm tell you to ascend.
  • Page 27 In this case it will be more manageable to maintain an additional distance below the ceiling, to make sure that the waves do not lift you above the ceiling. Suunto recommends that decompression takes place deeper than 4 m [13 ft], even if the indicated ceiling is shallower.
  • Page 28 CEILING STOP ASC TIME ° DIVE TIME Fig. 3.17. Decompression dive, at ceiling zone. Two arrows point at each other (“hour glass”). You are in the optimum ceiling zone at 3.5 m [11 ft] and your minimum ascent time is 5 minutes.

  • Page 29: Diving In Nitrox Mode

    3.4. DIVING IN NITROX MODE 3.4.1. Before Diving The GEKKO can be set for diving with standard air only (Air mode) or it can be set for diving with Enriched Air Nitrox (Nitrox mode). If you are educated for nitrox diving and you plan to make nitrox dives, it is recommended that you set the dive computer permanently to its NITROX Mode.

  • Page 30: Oxygen Displays

    Fig. 3.20. Nitrox display. Maximum depth based on set O2% (21%) and PO2 (1.4 bar) is 54.1 m [177 ft]. ° DIVE TIME Fig. 3.21. Surface display in the Nitrox mode NO DEC TIME ° DIVE TIME Fig. 3.22. Diving in Nitrox mode.

  • Page 31: Oxygen Limit Fraction (Olf)

    In Dive mode, the oxygen percentage labeled with % and the current oxygen toxicity exposure shown with an Oxygen Limit Fraction (OLF) bar graph are shown (Fig. 3.21. and Fig. 3.22.). During a dive, the oxygen partial pressure, labeled with PO shown instead of the maximum depth in the upper right display, if the partial pressure is greater than 1.4 bar or the set value (Fig.

  • Page 32: At The Surface

    ° DIVE TIME Fig. 3.26. Surface display. You have surfaced from a 18 minute dive, which maxi- mum depth was 20.0 m [66 ft]. The present depth is 0.0 m [0 ft]. Airplane symbol indicates that you should not fl y and Diver Attention Symbol indicates that you should prolong your surface interval time because of...

  • Page 33: Dive Numbering

    If set to Nitrox mode, the following information will also be shown: the oxygen percentage labeled with O2% is shown on the left side of the center window the current oxygen toxicity exposure shown with an Oxygen Limit Fraction (OLF) bar graph along the left side of the display.
  • Page 34 fl ying should be delayed for at least 24 hours, and if possible, for 48 hours. Suunto recommends that fl ying is avoided until all the DAN and UHMS guidelines and the dive computer wait to fl y conditions are satis-...

  • Page 35: Audible And Visual Alarms

    3.6. AUDIBLE AND VISUAL ALARMS The dive computer features audible alarms to advise when important limits are approached or to acknowledge preset alarms. A short single beep occurs, when: the dive computer is activated. when the dive computer automatically returns to the TIME mode. Three single beeps with a two second interval occurs, when: the no-decompression dive turns into a decompression stop dive.

  • Page 36: High Altitude Dives And Personal Adjustment

    the OLF bar graph reaches 100%. The blinking of the segments exceeding 80% will stop, when the OLF is not loading anymore. At that point the PO Continuous beeps for 3 minutes occur, when: the set oxygen partial pressure limit is exceeded. The maximum depth is replaced with a current blinking PO above the PO depth limit (Fig.

  • Page 37: Personal Adjustment

    of dissolved nitrogen in the body. It is recommended that you acclimate to the new altitude by waiting at least three hours before making a dive. 3.7.2. Personal Adjustment There are adverse personal factors for DCI which divers can predict in advance and input into the decompression model.

  • Page 38: Error Conditions

    3.8. ERROR CONDITIONS The dive computer has warning indicators that alert the user to react to certain situations that would signifi cantly increase the risk of DCI. If you do not respond to its warnings, the dive computer will enter an Error Mode, indicating that the risk of DCI has greatly increased.

  • Page 39: Menu Based Modes

    4. MENU BASED MODES To make yourself familiar with the menu based functions, please use your Quick Reference Guide supplied with the GEKKO together with the informa- tion in this chapter. The main menu based functions are grouped under 1) Memory and 2) Setting modes.

  • Page 40: Memory Functions [1 Memory]

    QUIT OPTIONS Fig. 4.4. Memory options. [3 MEMORY]. SELECT Fig. 4.5. Logbook option. [1 LOGBOOK]. page 1 DIVE SELECT TIME Fig. 4.6. Logbook, page I. Scroll different pages of specifi c dive. THE LIST OF THE MENU BASED MODES 1. MEMORY FUNCTIONS [1 MEMORY] Logbook and Dive Profi...

  • Page 41: Logbook And Dive Profi Le Memory [1 Logbook]

    4.1.1. Logbook and Dive Profi le Memory [1 LOGBOOK] This instrument has a very sophisticated high ca- pacity Logbook and Profi le Memory, with a data recording interval of 30 seconds. Dives shorter than the recording interval are not registered. To enter the Logbook Memory Mode select MODE- MEMORY- LOGBOOK.
  • Page 42 Page II (Fig. 4.7.) • dive number in the dive series • maximum depth (NOTE! Due to lower resolution, the reading may differ from the maximum depth reading of the Dive History up to 0.3 m [1 ft].) • total dive time •...
  • Page 43 Press the SMART (Select) button once to change the scroll buttons to scroll the different dives forward and backward (Fig. 4.10.). Press the SMART (>Select) button again to change function of the scroll buttons back to scroll the different pages of the selected dive. When searching the dives, only the page 1 is shown.

  • Page 44: Dive History Memory [2 History]

    4.1.3. PC Settings Mode [3 PC SET] Although the Gekko does not support PC-download, the tissue calculations can be reset and all settings returned to factory defaults using a PC-Interface cable and special software. This feature is useful for dive shops and their rental units only.

  • Page 45: Set Modes [4 Set]

    4.2.1. Dive Computer Model Settings[1 SET MODEL ] In the Model Setting mode the Gekko can be set to function in Air or Nitrox model. To enter the model settings select MODE- SET- MODEL (Fig. 4.16).

  • Page 46: 1.Dive Time Alarm Setting

    DIVE TIME Fig. 4.19. Setting Dive Time Alarm. Press scroll buttons to change alarm on/off and to set dive time value. Fig. 4.20. Setting Maximum Depth Alarm. Press scroll buttons to change alarm on/off and to set maximum depth value. SELECT Fig.
  • Page 47 MODE- SET- SET ADJ (Fig. 4.24). The adjustments are altitude, personal and dive computer units The current Altitude and Personal Adjustment modes are shown when diving and at the surface. If the mode does not match the altitude or personal conditions (see section 3.7.

  • Page 48: Care And Maintenance

    The service requires special tools and training. Therefore, it is advisable to contact an authorized SUUNTO dealer or distributor for bien- nial service. Do not attempt to do any service that you are not sure about how to do.

  • Page 49: Maintenance

    A leak must be corrected without delay, as moisture will seriously damage the unit, even beyond repair. SUUNTO does not take any responsibility for damage caused by moisture in the dive computer, if the instructions of this manual are not carefully followed.

  • Page 50: Battery Replacement

    In case of a leak, immediately take the dive computer to an authorized SUUNTO dealer or distributor. 5.5. BATTERY REPLACEMENT NOTE! It is advisable to contact an authorized Suunto dealer for battery replace- ment. It is imperative that the change is made in a proper manner to avoid any leakage of water into the battery compartment or computer.
  • Page 51 Check for any traces of fl ooding, particularly between the beeper and the lid, or for any other damage. In case of a leak or any other damage, bring the dive computer to an authorized SUUNTO dealer or distributor for check and repair.
  • Page 52 12. Check that the new lubricated O-ring is in good condition. Put it in the right position on the battery compartment. Be very careful not to get any dirt on the o-ring or its sealing surfaces. 13. Carefully press the lid onto the battery compartment with your thumb. It is better to press down the lid down one side fi...
  • Page 53 Complete Strap (V5841) Short Strap with buckle (V5836) Spring Bar (K5588) Long Strap (K5592) Fig. 5.1 Instrument parts. The code after the name stands for spare part order number. Fig. 5.2 Opening of the securing ring. Securing Ring (V5844) Battery Compartment Lid with buzzer (V5843) O-Ring (K5664)

  • Page 54: Technical Description

    6. TECHNICAL DESCRIPTION 6.1. OPERATING PRINCIPLES NO-DECOMPRESSION LIMITS The no-decompression limits displayed by the dive computer for the fi rst dive to a single depth (see Table 6.1. and Table 6.2.), are slightly more conservative than those permitted by the U.S. Navy tables. TABLE 6.1.
  • Page 55 TABLE 6.2. NO-DECOMPRESSION TIME LIMITS (MIN) FOR VARIOUS DEPTHS [FT] FOR THE FIRST DIVE OF A SERIES ALTITUDE DIVING The atmospheric pressure is lower at high altitudes than at sea level. After traveling to a higher altitude, the diver will have additional nitrogen in his body, compared to the equilibrium situation at the original altitude.

  • Page 56: Suunto Reduced Gradient Bubble Model (Rgbm)

    It is a signifi cant advance on the classical Haldane models, which do not predict free gas (microbubbles). The advantage of Suunto RGBM is additional safety through its ability to adapt to a wide variety of situations. Suunto RGBM addresses a number of diving circumstances outside the range of just dissolved gas models by:...

  • Page 57: Oxygen Exposure

    6.3. OXYGEN EXPOSURE The oxygen exposure calculations are based on currently accepted exposure time limit tables and principles. In addition to this the dive computer uses several meth- ods to conservatively estimate the oxygen exposure. These include for example: the displayed oxygen exposure calculations are upped to the next higher percentage value for recreational scuba diving, the recommended upper limit of 1.4 bar PO is used as a default...
  • Page 58 Maximum depth of operation: 80 m [262 ft] (complying with EN 13319). Accuracy: ± 1% of full scale or better from 0 to 80 m [262 ft] at 20°C [68°F] (complying with EN 13319). Depth display range: 0 … 99,9 m [328 ft]. Resolution: 0.1 m from 0 to 99,9 m [1 ft from 0 to 328 ft].
  • Page 59 NOTE! Do not leave the dive computer in direct sunlight! Tissue Calculation Model Suunto RGBM algorithm (developed by SUUNTO and Bruce R. Wienke, BS, MS and PhD). 9 tissue compartments. Tissue compartment halftimes: 2.5, 5, 10, 20, 40, 80, 120, 240 and 480 min- utes (on gassing).
  • Page 60 The quality of the battery (some lithium batteries may exhaust unexpect- edly, which cannot be tested in advance). The time the dive computer has been stored until it gets to the customer. The battery is installed into the unit at the factory. NOTE! Low temperature or an internal oxidation of the battery may cause the battery warning even though the battery has enough capacity.

  • Page 61: Warranty

    If a claim under this or any other warranty appears to be necessary, return the product, freight prepaid, to your Suunto dealer or distributor or qualifi ed repair facility. Include your name and address, proof of purchase and/or service registration card, as required in your country.

  • Page 62: Suuntosports.com

    Suunto Computer. If you already own a personal Suunto sports instrument you can access all sport-specifi c functions through registration. If you do not yet have an instrument you may either log in as a guest or register yourself.

  • Page 63: Getting Started

    You can also publish your logs and compare them with other users’ logs. The My Suunto section also contains a personal calendar that you can use to mark personal events and other useful information.

  • Page 64: Glossary

    9. GLOSSARY Altitude dive Ascent rate ASC RATE Ascent time ASC TIME Ceiling Ceiling Zone Central Nervous System Toxicity CNS% Compartment Decompression Decompression range Decompression illness A dive made at an elevation greater than 300 m [1000 ft] above sea level. The speed at which the diver ascends toward the surface.
  • Page 65 Dive series Dive time Enriched Air Nitrox Equivalent Air Depth Floor Half-time Multi-level dive NITROX NOAA No-decompression time The maximum amount of time a diver may remain No-decompression dive Any dive which permits a direct, uninterrupted ascent NO DEC TIME OEA = EAN = EANx Oxygen Tolerance Unit Is used to measure the Whole-Body-Toxicity.

  • Page 66: Disposal Of The Device

    Oxygen Limit Fraction A term used by SUUNTO for the values displayed in Oxygen partial pressure Limits the maximum depth to which the used Nitrox RGBM Reduced Gradient Bubble Model Repetitive dive Residual nitrogen SURF TIME Surface interval time Tissue group...
  • Page 67 MODE MAIN SUBMODE BASED MENU BASED MENU...
  • Page 68 COPYRIGHT This publication and its contents are proprietary to Suunto Oy. Suunto, Wristop Computer, Suunto Gekko, Replacing Luck and their logos are registered or unregistered trademarks of Suunto Oy. All rights reserved. While we have taken great care to ensure that information contained in this documentation is both comprehensive and accurate, no warranty of accuracy is expressed or implied.
  • Page 70 Made in Finland © Suunto Oy 06 / 2003, 09 / 2006...

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