Suunto Mosquito User Manual

Suunto mosquito watches: user guide.
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    AM/PM Indicator Safety Stop Warning Safety Stop Indicator Dive Time Dive Counter Oxygen Partial Pressure in Nitrox Mode Time Dual Time Day, Month Timer Seconds Oxygen Partial Pressure Daily Alarm On Indicator Dive Alarm On Indicator SUUNTO MOSQUITO QUICK REFERENCE QUIDE...

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    Patents have been issued or applied for one or several features of this product. The CE mark is used to mark conformity with the European Union EMC di rec tive 89/336/EEC. The SUUNTO dive instruments fulfi ll all the required EU di rec tives.

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    PrEN 13319 ”Diving accessories – Depth gauges and combined depth and time measuring devices – Functional and safety requirements, test methods” is a Eu ro pe an diving depth gauge standard draft. The MOSQUITO is designed to comply with this draft standard.

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    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).

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    DCI. As an added measure of safety, you should consult a physician regarding your fi tness before diving. Suunto strongly recommends that sport divers limit their maximum depth to 40 m [130 ft] or to the depth calculated by the computer based on the selected % and a maximum PO Dives with required decompression stops are not recommended.

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    Perform pre-checks. Always activate and check the device before diving in order to ensure that all Liquid Crystal Display (LCD) segments are completely dis played, that the device has not run out of battery power, and that the oxygen, altitude and personal adjustments are correct. Also, exit the Data Transfer mode before diving, as the computer does not automatically revert to Dive mode from Data Transfer mode.

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    Do not dive with a cylinder of enriched air if you have not personally verifi ed its contents and entered the analyzed value into your dive computer. Failure to verify cylinder contents and enter the appropriate O will result in incorrect dive planning information. The dive computer will not accept fractional percentage values of oxygen concentration.

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    fi ve meters [16 ft] after scuba diving depending on your diving activity. Suunto also recommends you to be trained in freediving technique and physiology before conducting breath holding dives. No dive computer can replace the need for proper dive training.

  • Page 10: Table Of Contents

    2.4. TIME MODE [TIME]... 20 2.4.1. Timekeeping Display ... 20 2.4.2. Stopwatch [Timer] ... 21 3. DIVING WITH THE MOSQUITO... 23 3.1 BEFORE DIVING ... 24 3.1.1. Activation and Pre-checks ... 24 3.1.2. Battery Power Indicator and Low Battery Warning ... 26 3.1.3.

  • Page 11: Table Of Contents

    3.2.1. Diving with Air ... 30 Dive Planning [PLAN] ... 30 Presetting the Displays in the Air mode ... 32 Basic Dive Data ... 32 Safety stops ... 34 Recommended Safety Stop ... 35 Mandatory Safety Stop ... 35

  • Page 12: Table Of Contents


  • Page 13: Table Of Contents


  • Page 14: Introduction

    1. INTRODUCTION Congratulations on your purchase of the SUUNTO MOSQUITO advanced wristop dive computer. The Mosquito builds on the Suunto tradition of delivering feature- rich dive computers, providing different operating modes for different types of diving. Push button controls access a wide selection of choices. The display is optimized for the dive mode chosen and it incorporates a patented user defi...

  • Page 15: Safety Precautions

    Recommended Safety Stop is included. The combination of stop types will depend on the specifi c dive situation. To get the most from the safety benefi ts be sure to read the summary of the Suunto Reduced Gradient Bubble Model in chapter 7.2.

  • Page 16: Emergency Ascents, Dive Computer Limitations

    Do not attempt to dive with any gas mix other than standard air without fi rst receiving certifi ed training in this specialty. 1.1.1. EMERGENCY ASCENTS In the unlikely event that Mosquito malfunctions during a dive, follow the emergency procedures provided by your certifi ed dive training agency or, alternatively, STEP 1: Assess the situation calmly and then move promptly to less than 18 m [60 ft].

  • Page 17: Nitrox, Freediving

    1.1.3. NITROX Diving with nitrox provides the diver with an opportunity to reduce the risk of decompression illness by reducing the nitrogen content in the breathing gas mix. However, when the gas mix is altered, the oxygen content of the mix is generally increased.

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    fi ve meters [16 ft] for at least two hours after scuba diving. Suunto also recommends you to be trained in freediving technique and physiology before conducting breathhold dives. No dive computer can replace the need for proper dive training.

  • Page 19: Getting Acquainted, Functions, Push Buttons

    (FREE). The AIR/EAN/FREE modes can also be disabled (set to OFF) and the instrument can be used as a sports watch on land or in water. 2.2. PUSH BUTTONS The Mosquito is controlled with four push buttons as follows (see Fig. 2.1.). M (MODE) •...

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    • To select the dive planning mode in the dive surface modes. • To make a special bookmark in the profi le memory during a dive +, - • To show the date, seconds or dual time in the time keeping display press the + or - button.

  • Page 21: Water Contacts

    The water contacts consist of the PC-interface poles and the four push-buttons of the Mosquito (Fig. 2.2). When the PC-interface poles and one of the push-buttons are connected by the conductivity of the water the Surface or Diving Mode is automatically activated.

  • Page 22: Time Mode [time], Timekeeping Display

    Setting Mode (see chapter 4). 2.4.1. TIMEKEEPING DISPLAY The timekeeping display is the primary display of the Mosquito (Fig. 2.5.). When the Time Mode is entered from other modes, the timekeeping display activates within two seconds, if no button is operated.

  • Page 23: Stopwatch [timer]

    (TIME) on the left side of the display indicate that you have entered the Stopwatch function (Fig. 2.6.). The stopwatch of the Mosquito lets you measure elapsed time, split times and the times of two runners. The range of the stopwatch is 9 hours, 59 minutes, 59.9 seconds (Fig.

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    Use the + and - buttons to operate the elapsed time measurement, split time measurement or the times of two runners as follows: Diving with the Mosquito or performing data transfer will stop the stopwatch. However, it is possible to use stopwatch function when diving, if the AIR/EAN/...

  • Page 25: Diving With The Mosquito

    3. DIVING WITH THE MOSQUITO In order to familiarize yourself with the menu based functions, Suunto recommends you use your Quick Reference Guide supplied with the Mosquito together with the information in the following chapters. This section contains instructions on how to operate the dive computer and interpret its displays.

  • Page 26: Before Diving, Activation And Pre-checks

    Ready display con- fi rming that the activation is complete (Fig. 3.4.). At this time, perform your pre-check making sure that: • the Mosquito operates and provides a complete display • the low battery indicator is not on •...

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    • the oxygen partial pressure limit is set correctly. The Mosquito is now ready for diving. NOTE: The surface interval time does not run before the fi rst dive. Fig. 3.4. Startup III. Surface mode (Air). Depth and dive time are zero.

  • Page 28: Battery Power Indicator And Low Battery Warning

    After activation of the Dive Mode or after diving, the Mosquito will automatically switch to show the time keeping display within 5 minutes to conserve the battery power, if you do not press any buttons. However, the dive computer functions will remain active until it has calculated that all residual nitrogen has off-gassed.

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    TABLE 3.1. BATTERY POWER INDICATOR Temperature or an internal oxidation of the battery affects the battery voltage. If the instrument is stored for a long period, the low battery warning may be displayed even though the battery has enough capacity. The low battery warning may also be displayed at low temperatures, even though the battery has enough capacity in warmer conditions.

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    This Mosquito has several User Defi nable Functions and depth and time related alarms that you can set according to your personal preference. For example the Mosquito has a patented presetting system for the User Defi nable Display Field in the lower part of the display.

  • Page 31: Presetting Time Alarm, Presetting Dive Alarms, Bookmark Function

    (Fig. 3.7). The Bookmarks will also be shown as annotations in the PC-software, Suunto Dive Manager. To make a bookmark on the profi le memory during a dive press the S button. The Diver Attention Symbol...

  • Page 32: Scuba Diving, Diving With Air, Dive Planning [plan]

    (Fig. 3.8.), the display will show the no-decompression limit for the depth of 9 m [30 ft]. By pressing the + button, the Mosquito will calculate and show the next deeper no-decompression limits in 3 m [10 ft] increments ending at 45 m [150 ft] or at the maximum allowed depth in the EAN mode.

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    The Planning mode also accounts for the following information from previous dives: • any calculated residual nitrogen • all dive history for the past four days • oxygen exposure (EAN mode) The no-decompression times given for different depths will therefore be shorter than before your fi rst “fresh”...

  • Page 34: Presetting The Displays In The Air Mode, Basic Dive Data

    Fig. 3.10. Dive has just begun. Available no-decompression time is more than 199 min. Fig. 3.11. Diving display. Present depth is 19.3 m [63 ft] and no-decompression stop time limit is 23 minutes in A0/P1 mode. Maximum depth during this dive has been 19.8 m [65 ft], elapsed dive time is 16 minutes.

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    During a no-decompression stop dive, the following information will be displayed (Fig. 3.11.): • your present depth in meters [ft] • the Altitude Adjustment setting on the right side of the center window with a wave and mountain symbols (A0, A1, or A2) (see Table 3.3.) •...

  • Page 36: Safety Stops

    Reasons to perform a safety stop include a reduction in sub clinical DCI, microbubble reduction, ascent control, and orientation before surfacing. The Mosquito displays two different types of safety stops: Recommended Safety Stop and Mandatory Safety Stop. The Safety Stops are indicated by: •...

  • Page 37: Recommended Safety Stop, Mandatory Safety Stop

    When the ascent rate exceeds 12 meters/min [40 ft] momentarily or 10 meters/min [33ft] continuously the micro-bubble build-up is predicted to be more than allowed for in the decompression model. The Suunto RGBM calculation model responds to this by adding a Mandatory Safety Stop to the dive. The time of this Mandatory Safety Stop will depend on the severity of the ascent rate excess.

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    Fig. 3.14. Violated Mandatory Safety Stop. Downward pointing arrow and an audible alarm indicate you should descend to ceiling zone. You must not ascend shallower than 3 m [10 ft] with the Mandatory Safety Stop warning on. If you ascend above the Mandatory Safety Stop ceiling, a downward pointing arrow will appear and a continuous beeping starts (Fig.

  • Page 39: Ascent Rate Indicator ASCENT RATE INDICATOR The ascent rate is shown graphically along the left side of the display as follows: TABLE 3.2. ASCENT RATE INDICATOR When the maximum allowed ascent rate is exceeded, the SLOW warning and the STOP sign appear, indicating that the maximum ascent rate has been exceeded continuously or that the current ascent rate is signifi...

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    Fig. 3.15 Ascent Rate Indicator. Blinking SLOW and four segments are shown together with an audible alarm: ascent rate is more than 10 m/min [33 ft/min]. This is a caution to slow down! STOP sign means that you are advised to make a Mandatory Safety Stop when you reach a depth of 6 Whenever the SLOW warning segment and the STOP...

  • Page 41: Decompression Dives DECOMPRESSION DIVES When your NO DEC TIME becomes zero, your dive becomes a decompression stop dive, i.e. you must perform one or several decompression stops on your way to the surface. The NO DEC TIME on your display will be replaced by a CEILING and blinking ASC TIME notation and an upward pointing arrow (Fig.

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    The ascent time (ASC TIME) is the minimum amount of time needed to reach the surface in a decompression dive. It includes: • time needed to ascend to the ceiling at an ascent rate of 10 m/min [33 ft/min] plus •...

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    CEILING, CEILING ZONE, FLOOR AND DECOMPRESSION RANGE When in decompression, it is important that you understand the meaning of ceiling, fl oor, and decompression range (Fig. 3.16.): • The ceiling is the shallowest depth where decompression could be made. At this depth, or below, you must perform all stops. •...

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    Suunto recommends that decompression takes place deeper than 4 m [13 ft], even if the indicated ceiling is shallower.

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    DISPLAY BELOW THE FLOOR The blinking ASC TIME and an upward pointing arrow indicate that you are below the fl oor (Fig. 3.17.). You should start your ascent immediately. The ceiling depth is shown on the left and the minimum total ascent time on the right side of the center window.

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    Fig. 3.20. Decompression dive, above ceiling. Note downward pointing arrow, Er warning and an audible alarm. You should immediately (within 3 minutes) descend to or below ceiling. only after the ASC TIME and CEILING labels have disappeared, which means that the decompression stop and any Mandatory Safety Stop has been completed.

  • Page 47: Diving With Ean (nitrox), Before Diving

    % is adjusted to any other percentage of oxygen (22% - 50%). If a dive is started within 2 hours Mosquito retains this value until the dive series is fi nished. If unused, the computer will retain the manually entered value for the...

  • Page 48: Presetting The Displays In The Ean Mode

    Fig. 3.21. Nitrox display. Maximum depth based on set % (21%) and PO (1.4 bar) is 54.1 m [177 ft]. Fig. 3.22. Diving in EAN mode. The O % is set to 32%. PO2 is 0.9. Alternative displays are maximum depth, temperature, dive time and time.

  • Page 49: Oxygen Displays OXYGEN DISPLAYS If set to EAN mode the NITROX display, with all labeled oxygen information, is shown immediately after activation. The nitrox display shows (Fig. 3.21.): • oxygen percentage, labeled with O shown in the left side of the lower display •...

  • Page 50: Oxygen Limit Fraction (olf) OXYGEN LIMIT FRACTION (OLF) In addition to tracking the diver’s exposure to nitrogen, the instrument tracks the exposure to oxygen. These calculations are treated as entirely separate functions. The dive computer calculates separately for Central Nervous System oxygen toxicity (CNS) and Pulmonary Oxygen toxicity, the latter measured by the addition of Oxygen Toxicity Units (OTU).

  • Page 51: At The Surface, Surface Interval After An Air/ean Dive

    3.2.3. AT THE SURFACE SURFACE INTERVAL AFTER AN AIR/EAN DIVE An ascent to any depth shallower than 1.2 m [4 ft] will cause the DIVING display to be replaced by the alternating SURFACE displays, giving the following information (Fig. 3.24. and 3.25.): •...

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    Fig. 3.24. Surface display. You have surfaced from a 18 minute dive, which maximum depth was 20.0 m [66 ft]. The present depth is 0.0 m [0 ft] and surface interval time is 0. Airplane symbol indicates that you should not fl y and diver attention symbol indicates that you should prolong your surface interval time because of excess...

  • Page 53: Diver Attention Symbol, Dive Numbering DIVER ATTENTION SYMBOL The Diver Attention Symbol is an advice to extend surface interval. Some patterns of diving, in particular multiday diving with many dives and short surface intervals, cumulatively add a higher risk of DCI. When this is detected in addition to adapting the decompression algorithm, the Diver Attention Symbol is shown.

  • Page 54: Flying After Diving

    the dive time will begin where it left off. After 5 minutes on the surface, subsequent dives are, by defi nition, repetitive. The dive counter displayed in the Planning Mode will increment to the next higher number if another dive is made.

  • Page 55: High Altitude Dives And Personal Adjustment, Altitude Adjustment

    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 satisfi ed. 3.2.4. HIGH ALTITUDE DIVES AND PERSONAL...

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    TABLE 3.3. ALTITUDE ADJUSTMENT RANGES The entered Altitude Adjustment Mode is indicated by mountain symbols (A0, A1 = one mountain, or A2 = two mountains). Also, the maximum altitudes are displayed for each Altitude group (see Table 3.3.). Chapter 4.6. describes how the Altitude Mode is adjusted.

  • Page 57: Personal Adjustment PERSONAL ADJUSTMENT There are adverse personal factors for DCI which divers can predict in advance and input into the decompression model. Factors that may affect susceptibility to decompression illness vary between divers and also for the same diver from one day to another.

  • Page 58

    This feature should be used to adjust the computer to be more conservative, according to personal preference, by entering the suitable Personal Adjustment Mode with the help of Table 3.4. In ideal conditions, retain the default setting, P0. If conditions are more diffi cult or other mentioned factors which tend to increase the possibility of DCI exist, select P1 or even the most conservative P2.

  • Page 59: Error Conditions

    The Error mode will stay for 48 hours, during which time you should not dive. Whilst Mosquito is in Error mode the ASC TIME label will be displayed in the center window and the Planning Mode will be disabled.

  • Page 60: Freediving, Before Diving In The Free Mode, Presetting The Displays In The Free Mode

    If set to Free mode, the dive computer can be used for freediving or snorkeling. In the freediving mode the Mosquito provides depth, time and profi le information and an accurate 2 second sampling interval for the logbook profi le memory The Free mode is set using the SET DIVE function (See Chapter 4.3 Dive Mode Settings)

  • Page 61: During The Freedive, Freediving Day History

    Preset with the + button in the lower right corner of the display (Fig. 3.28.) • the dive time, • the current time or • the dive number. 3.3.3. DURING THE FREEDIVE In the Freediving mode the present depth is always shown.

  • Page 62: Exceeding The Freediving Time Limit

    Er. After 6 minutes in the Free mode the Mosquito goes into Error mode, and the Er warning is permanently displayed (Fig. 3.32). NOTE: The Free mode is limited to 5+1 minutes.

  • Page 63: Surface Interval After A Freedive

    3.3.6. SURFACE INTERVAL AFTER A FREEDIVE An ascent to any depth shallower than 1.2 m [4 ft] will cause the DIVING display to be replaced by the SURFACE display, giving the following information (Fig. 3.33.): • maximum depth of most recent dive in meters [ft] •...

  • Page 64: Audible And Visual Alarms

    Mode within three minutes, indicated by a permanent Er (Fig. 3.20.). • the 5 minute time limit in Freediving mode is exceeded. An error warning Er and a upward pointing arrow will appear. After 5+1 minutes the Mosquito goes into Error mode (Fig. 3.32).

  • Page 65

    You are able to preset alarms before the actual dive. The user programmable alarms can be set for maximum depth, dive time and daily time. The alarms activate when: • The preset maximum depth is reached • continuous beep series for 24 seconds or until any button is pressed. •...

  • Page 66

    Continuous beeps for 3 minutes and the backlight activated occur when: • the set oxygen partial pressure limit is exceeded. The maximum depth is replaced with the current blinking PO ascend above the PO When the oxygen limit fraction indicates that the maximum limit is reached, you must immediately ascend until the warning stops blinking! Failure to take action to reduce oxygen exposure after the warning is given can rapidly increase the risk of oxygen toxicity and the risk of injury or death.

  • Page 67: Setting Mode [set], Setting Time, Date And Dual Time [time ]

    4. SETTING MODE [SET] The time, date, dual time, daily alarm, scuba and free dive selections and settings, dive time and depth alarms and the altitude, personal and unit adjustments are set in the Setting Mode (Fig. 4.1.). Enter the Setting Mode from other modes by pressing the M button.

  • Page 68

    Fig. 4.3. The Time Adjustment Mode is activated and the second digits are blinking. Page I. Fig. 4.4. The year, month and day is selected. Page II. Dual time selected. Page III. 3. Press S to change the selection in the following sequence: - >...

  • Page 69: Daily Alarm Setting [alm]

    • The display is illuminated by holding down the M button for more than two seconds. 4.2. DAILY ALARM SETTING [ALM] You can set one daily alarm in the Mosquito. When the daily alarm activates, the 1 minute and the alarm sounds for 24 seconds. The alarm is given at the preset time each day.

  • Page 70

    3. Press S to change the selection in the following sequence: - >On/OFF status - > hours - > minutes 4. While the alarm status [On/OFF] is selected (blinking) press + or - to change the status. When the alarm status is On, the daily alarm indicator ( -symbol) in the bottom right corner of the display indicates that the alarm is on.

  • Page 71: Dive Mode Settings [dive], Set Air Mode

    (Air, Nitrox or Free) or turn the dive modes OFF. If the dive modes are turned OFF, the dive computer functions are disabled, thus turning the Mosquito into a mere water resistant sportswatch. NOTE: If the DIVE mode is disabled (set to OFF), the instrument will not activate the selected diving mode (Air, EAN, Free) when submerged.

  • Page 72

    Fig. 4.9. Setting Oxygen Percentage and Partial Pressure (EAN mode only). 3. Press S to change the selection in the following sequence: - >On/OFF status - > AIR/EAN/FREE mode When the AIR/EAN/FREE dive mode is selected (blinking) press + or - to change the mode to AIR. 4.

  • Page 73: Set Ean Mode

    4.3.2. SET EAN MODE If set to the EAN (Nitrox) mode, the correct oxygen percentage of the gas in your cylinder must always be entered into the computer to ensure correct nitrogen and oxygen calculations. Also in EAN mode, the oxygen partial pressure limit must be set.

  • Page 74: Set Free Mode

    When Oxygen percentage (O %) or Oxygen partial pressure (PO ) are selected (blinking) press + or - to change the setting (Fig. 4.9.). 5. After you have set the EAN settings, press the M button to save the settings and to return to the Setting Mode [SET] 4.3.3.

  • Page 75: Dive Alarm Settings [dive Al]

    4.4. DIVE ALARM SETTINGS [DIVE AL] You can set one depth alarm in the Mosquito. When the depth alarm activates, the -symbol blinks as long as the present depth value exceeds the adjusted value and the alarm sounds for 24 seconds. Press any button to stop the audible alarm, after it has activated.

  • Page 76

    Fig. 4.12. Dive Time Alarm. Display when more than 5 minutes dive time left. 4. While the alarm status [On/OFF] is selected (blinking), press + or - to change the status. When the alarm status is On, the depth alarm indicator ( -symbol) in the bottom right corner of the display indicates that the alarm is on.

  • Page 77: Altitude, Personal And Unit Adjustment Settings Adj]

    4.5. ALTITUDE, PERSONAL AND UNIT ADJUSTMENT SETTINGS [AdJ] The current Altitude and Personal Adjustment Modes are shown when diving as well as at the surface. If the mode does not match the altitude or conditions (see chapter 3.2.4.), it is imperative that the diver enters the correct selection before diving.

  • Page 78

    Fig. 4.15. Setting Personal Adjustment. Fig. 4.16. Setting metric/ imperial units. 3. Press S to change the selection in the following sequence. - >altitude adjustment - > personal adjustment - > units 4. While the altitude digits are selected (blinking), press + or - to change the Altitude Mode (Fig.

  • Page 79: Memories And Data Transfer [mem]

    5. MEMORIES AND DATA TRANSFER [MEM] The memory functions for the Mosquito include the combined Logbook and Dive Profi le Memory, Dive History Memories for scuba and free dives and the Data Transfer and PC-Interface functions. NOTE: After scuba diving, the memory mode cannot Fig.

  • Page 80: Logbook And Dive Profile Memory [log]

    Fig. 5.2. Logbook memory mode 5.1. LOGBOOK AND DIVE PROFILE MEMORY [LOG] This instrument has a sophisticated high capacity Logbook and Profi le Memory. The data is recorded to the profi le memory based on the sampling rate. The sampling rate in Air/EAN mode is 20 s, and in Free mode 2 s.

  • Page 81

    The following information will be shown on four pages: Page I, main display (Fig. 5.3.) • dive number in the dive series, Air/EAN dives are indicated by a D number and Freedives by a F number • dive entry time and date. Page II (Fig.

  • Page 82

    Fig. 5.5. Logbook, page III. Surface interval time, average depth. Fig. 5.6. Logbook, page IV. Profi le of specifi c dive. • ASC TIME label, if the dive was a decompression stop dive • Diver attention symbol, if the dive was started while symbol was displayed •...

  • Page 83

    The data of the most recent dive is shown fi rst. Press - to call the information from the previous dive. Press the - button consecutively to move backward through the dives. Press + to move forward through the dives. It is possible to scroll trough the dives on all four pages.

  • Page 84

    After the last depth fi gure of the selected profi le, the Mosquito automatically returns to Display I of the same dive in the Logbook. If desired, the profi le of the same dive can be recalled again following the above procedure.

  • Page 85: Dive History Memory [his]

    5.2. DIVE HISTORY MEMORY [HIS] The Dive History is a summary of all the scuba and free dives recorded by the Mosquito. Scuba and Freediving histories are kept separate. To enter the Dive History Memory Mode: 1. In the Memory Mode [MEM], press S two (2) times to select the Dive History Memory Mode (Fig.

  • Page 86: Data Transfer And Pc-interface [tr-pc]

    PC-Interface and the SUUNTO DIVE MANAGER software. With the PC-Interface dive data from the Mosquito can be downloaded to a PC. Data can be added to complete the logbook and paper copies of your dive log and profi les can easily be printed. The...

  • Page 87

    The data transfer is carried out using the water contact of the Mosquito. The following data is transferred to the PC: • depth profi le of the dive • dive time • preceding surface interval time • dive number •...

  • Page 88

    After you have fi nished the data transfer, Press the M to exit Data Transfer Mode [TR-PC] and enter the Memory Mode [MEM]. If no button is operated or no data is transferred within 5 minutes, the Mosquito beeps and returns to the timekeeping display automatically.

  • Page 89: Care And Maintenance, Care Of Your Mosquito

    • Every two years or after 200 dives (whichever comes fi rst) have your Mosquito serviced by an authorized dealer or distributor. This service will include a general operational check, replacement of the battery and a water resistance check and if needed, replacement of the seals, buttons, or display.

  • Page 90: Maintenance

    Suntan oil, silicone spray and grease will speed up this process. As a result of this buildup, moisture will be trapped next to the water contact and will not allow your Mosquito to operate properly.

  • Page 91: Water Resistance Inspection

    fl ushed out. Check the display for possible moisture or water. DO NOT use the Mosquito if you detect any moisture or water inside. CAUTION! • do not use compressed air to blow water off the unit •...

  • Page 92: Battery Replacement

    6.4. BATTERY REPLACEMENT NOTE: It is advisable to contact an authorized Suunto dealer for battery replacement. 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 93

    Check for any traces of fl ooding or 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. Fig. 6.1.Battery Compartment...

  • Page 94

    5. Remove the old O-ring from the battery compartment lid. 6. Check the condition of the old O-ring; a defective O-ring may indicate sealing or other problems. Dispose the old O-ring and battery compartment lid, even if they seem to be in good condition. 7.

  • Page 95: Technical Description, Operating Principles

    7. TECHNICAL DESCRIPTION 7.1. 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 7.1. and 7.2.), are slightly more conservative than those permitted by the U.S. Navy tables. TABLE 7.1.

  • Page 96


  • Page 97

    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. This “additional” nitrogen is released gradually in time and equilibrium is reached.

  • Page 98: Reduced Gradient Bubble Model, Suunto Rgbm

    (microbubbles). It incorporates consistency with real physical laws for gas kinetics. 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 99

    SUUNTO RGBM ADAPTIVE DECOMPRESSION The SUUNTO RGBM algorithm adapts its predictions of both the effects of micro-bubble build-up and adverse dive profi les in the current dive series. It will also change these calculations according to the personal adjustment you select.

  • Page 100: Oxygen Exposure

    When this is detected in addition to adapting the decompression algorithm Suunto RGBM will in some circumstances also advise, with the Diver Attention Symbol (review chapter that the diver extend the surface interval 7.3.

  • Page 101

    The oxygen related data and warnings are provided at all appropriate phases of a dive. The following information will be shown before and during a dive, when the computer is set in EAN mode: • the selected O • the color-coded OLF% bar graph for either CNS% or OTU% •...

  • Page 102: Technical Specification

    7.4. TECHNICAL SPECIFICATION Dimensions and weight: • Width: 48.9 mm [1.92 in] • Height: 54.8 mm [2.16 in] • Thickness: 15.8 mm [0.62 in] • Weight: 50.3 g [1.78 oz] Depth Gauge: • Temperature compensated pressure sensor. • Salt water calibrated, in fresh water the readings are about 3% smaller (calibrated complying with prEN 13319).

  • Page 103

    Temperature display: • Resolution: 1ºC [1.5ºF] • Display range: - 20 ... +50ºC [- 4 ... +122ºF] • Accuracy: ± 2ºC [± 3.6ºF] within 20 minutes of temperature change Calendar Clock: • Accuracy: ± 15 s /month (at 20ºC [68ºF]) •...

  • Page 104

    Normal altitude range: 0 to 3000 m [10000 ft] above sea level. • Operating temperature: 0°C to 40°C [32°F to 104°F]. • Storage temperature: -20°C to +50°C [-4°F to +122°F]. It is recommended that the Mosquito be stored in a dry place at room temperature. FREE MODE AIR/EAN MODE...

  • Page 105

    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 minutes (on gassing). The off gassing halftimes are slowed down.

  • Page 106

    The following conditions have an affect on the expected battery lifetime: • The length and type of the dives. • The condition in which the unit is operated and stored (e.g. temperature/ cold conditions). Below 10°C [50°F] the expected battery lifetime may be 50-75% of that at 20°C [68°F].

  • Page 107: Warranty

    Include your name and address, proof of purchase and/or service registration card, as required in your country. The claim will be honored and the product repaired or replaced at no charge and returned in what your Suunto dealer or distributor determines a reasonable amount of time, provided all necessary parts are in stock.

  • Page 108

    fi tness for a particular purpose, are limited from date of purchase and in scope to the warranties expressed herein. Suunto shall not be liable for loss of use of the product or other incidental or consequential costs, expenses or damage incurred by the purchase.

  • Page 109: Glossary

    9. GLOSSARY Altitude dive A dive made at an elevation greater than 300 m [1000 ft] above sea level. Apnea Absence of breathing. Freedivers are apneic throughout the duration of their dive. Ascent rate The speed at which the diver ascends toward the surface. ASC RATE Abbreviation for ascent rate.

  • Page 110

    CNS% Central Nervous System toxicity limit fraction. See note “Oxygen Limit Fraction”. Compartment See “Tissue group”. Divers Alert Network. Abbreviation for decompression illness. Decompression Time spent at a decompression stop or range before surfacing, to allow absorbed nitrogen to escape naturally from tissues.

  • Page 111

    Dive time Elapsed time between leaving the surface to descend, and returning to the surface at the end of a dive. Abbreviation for equivalent air depth. Abbreviation for enriched air nitrox. Enriched Air Nitrox Also called Nitrox or Enriched Air = EANx. Air that has some oxygen added.

  • Page 112

    Hyperventilation An increase in rate and/or volume of breathing. Carbon dioxide blood levels decrease with little corresponding increase in oxygen blood levels. If the diver engages in excessive hyperventilation, he may diminish his desire to breathe, long enough to become unconscious after a long period of apnea.

  • Page 113

    Oxygen Tolerance Unit Is used to measure the Whole-Body-Toxicity. Oxygen Limit Fraction A term used by SUUNTO for the values displayed in the Oxygen Toxicity bar graph. The value is either the CNS% or the OTU%. Oxygen percentage or oxygen fraction in the breathing gas.

  • Page 114

    Abbreviation for oxygen partial pressure. SRGBM Abbreviation for Suunto Reduced Gradient Bubble Model. Suunto Reduced Gradient Bubble Model Modern algorithm for tracking both dissolved and free gas in divers. Repetitive dive Any dive whose decompression time limits are affected by residual nitrogen absorbed during previous dives.

  • Page 115

    Surface interval time Elapsed time between surfacing from a dive and beginning a descent for the subsequent repetitive dive. Tissue group Theoretical concept used to model bodily tissues for the construction of decompression tables or calculations. Whole-Body Toxicity Another form of oxygen toxicity, which is caused by prolonged exposure to high oxygen partial pressures.

  • Page 118: Disposal Of The Device

    COPYRIGHT This publication and its contents are proprietary to Suunto Oy. Suunto, Wristop Computer, Suunto Mosquito, 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 119

    & scuba dive & oxygen settings scuba dive dive alarms history altitude & data personal & transfer unit adjustment MODE mode light exit SUUNTO MOSQUITO MODES AND OPERATIONS p1 End free dive history...

  • Page 122

    Made in Finland © Suunto Oy 06 / 2004, 04 / 2006...

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