Suunto D4 manual Dive computer limitations, Nitrox

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3.Stay there for as long as your air supply will safely allow. After reaching the sur- face, do not dive for at least 24 hours.

5.3. Dive computer limitations

While the dive computer's calculations are based on current decompression research and technology, it is important to realize that the computer cannot monitor the actual physiological functions of an individual diver. All decompression schedules currently known to the authors, including the U.S. Navy Tables, are based on theoretical mathematical models, which are intended to serve as a guide to reduce the probability of decompression illness.

5.4. Nitrox

Diving with nitrox provides you with an opportunity to increase bottom times or reduce the risk of decompression illness by reducing the nitrogen content in the gas mix. However, when the gas mix is altered, the oxygen content of the mix is generally in- creased. This increase exposes the diver to an oxygen toxicity risk not usually con- sidered 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.

In addition to the physiological effects of enriched air on the body, there are operational considerations to be addressed when handling altered breathing mixes. Elevated concentrations of oxygen present a fire or explosion hazard. Consult the manufacturer of your equipment to check its compatibility with nitrox.

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Contents Page Getting Started with Your Suunto D4 Diving Care and Maintenance of MY Suunto Diving Computer Intellectual Property Welcome to the World of Suunto Diving INSTRU- Ments Page Any confusion resulting from neglecting to follow this users Page Selected O2% and a Maximum PO2 of 1.4 BAR Have not Personally Verified ITS Contents Dive Computer will not Accept Fractional Page Navigating in the menus Suunto D4 AT a GlanceButton symbols and functions Mode Symbol Button Press Main functionsDown Long Enter Setting mode Getting Started with Your Suunto D4 Time mode settingsMore than 5 seconds Setting the alarmSetting the dual time Setting the timeSetting the units Setting the dateSetting the tones Setting the backlightAC water contacts StopwatchPage Before Diving Emergency ascents Suunto RGBM/Deep Stop AlgorithmNitrox Dive computer limitationsFree diving Audible and visual alarmsAlarm type Oxygen alarms in Nitrox mode Alarm type Alarm reasonOmitted decompression Error conditionsDive mode settings Rgbm SettingSetting the depth alarm Setting the dive-time alarm Setting the depth notify alarm Free modeSetting the personal/altitude adjustments Setting the nitrox valuesSetting the sample rate Setting the surface time notify alarm Free modeSetting the Deep Stops Setting the Rgbm valuesActivation and pre-checks Dive mode activation Accessing Dive modePage Diving at altitude Battery power indicationHow the Altitude value is set Alt. adjustment value Altitude rangePersonal adjustments Personal ad Condition Desired tables Rgbm setting Desired Tables Effect Safety StopsRecommended Safety Stops Mandatory Safety Stops To or below Ceiling Deep stops Diving in AIR mode DIVEair DivingBasic dive data Down Button Toggles Between Maximum Depth and Current Time Bookmark Ascent rate indicatorDecompression dives Ceiling, ceiling zone, floor and decompression range Page Display above the floor Display below the floorDisplay above the ceiling Display at the ceiling zoneBefore diving in Nitrox mode Diving in Nitrox mode DIVEnitroxOxygen displays Default nitrox settingsDown Button Oxygen limit fraction OLF Diving in Free mode DIVEfreeDay History There is no ascent rate monitoring in the Free modeNew one Free dive time limit Alarms Symbol on display After DivingSurface interval Dive numbering AIR and Nitrox Free Dive Repetitive dive planningFlying after diving Memory mode Dive Planning mode MEMPlan See .7. Error conditions Dive logbook MEMLogbook Dive numbering shown during dive planningBeen replaced according to the instructions Dive history MEMHistory Scuba HistoryFree Dive History Suunto Dive Manager SDM Page Page Water Contacts and Push Buttons Care and Maintenance of MY Suunto Diving COM- PuterMaintenance Water Resistance Inspection FAQsWhat are Original Suunto ACCESSORIES? Page By the warranty Battery ReplacementCalendar clock Technical DataTemperature display Depth gaugeDisplays only in Nitrox mode Logbook/dive profile memoryOperating conditions Battery Tissue calculation modelRgbm Suunto Rgbm adaptive decompression Diver Attention Symbol Advice to Extend Surface IntervalNo-decompression limits No-decompression time limits for various depths m No-decompression time limits for various depths ft Oxygen exposure Altitude divingPage Intellectual Property Copyright TrademarkPatent notice Disclaimers User’s responsibility12.2. CE Page Exclusions and Limitations Warranty PeriodAccess to Suunto warranty service Page Other important notices Limitation of Liability Disposal of the Device DAN DCI Glossary103 104 105 Customer Service Contacts Suunto Oy 10/2007