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Suunto D9 — altitude Diving: Adjustments, Safety & Equipment Guide [108/122]
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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 gra-
dually in time and equilibrium is reached. It is recommended that you acclimate to the
new altitude by waiting at least three hours before making a dive.
Before high altitude diving, the instrument must be set to the Altitude Adjustment mo-
de to adjust the calculations for the new altitude. The maximum partial pressures of
nitrogen allowed by the mathematical model of the dive computer are reduced accor-
ding to the lower ambient pressure.
As a result, the allowed no-decompression stop limits are considerably reduced.
SURFACE INTERVALS
The dive computer requires a minimum surface interval of 5 minutes between dives.
If a surface interval is shorter than 5 minutes, the next dive is treated as a continuati-
on of the previous dive.
10.3. OXYGEN EXPOSURE
The oxygen exposure calculations are based on currently accepted exposure time li-
mit tables and principles. In addition to this the dive computer uses several methods
to conservatively estimate the oxygen exposure. These include for example:
- the displayed oxygen exposure calculations are upped to the next higher per-
centage value
Содержание
- Quick reference guide p.2
- Warning p.6
- Warning p.7
- Warning p.8
- Warning p.9
- Warning p.10
- Table of contents p.12
- Introduction p.16
- Safety precautions p.18
- Emergency ascents p.18
- Nitrox p.19
- Dive computer limitations p.19
- Freediving p.20
- Getting acquainted p.21
- Display and buttons p.21
- Water contacts p.23
- Operating modes p.24
- Wireless pressure transmission p.25
- Time mode p.26
- Time display p.26
- Pc interface p.26
- Stopwatch timer p.27
- Time mode settings p.28
- Daily alarm p.28
- Dual time p.29
- Backlight p.30
- Compass mode p.31
- Compass display p.31
- Accessing the compass p.31
- Declination p.33
- Compass settings p.33
- Calibrate p.33
- If the calibration continues to fail contact an authorized suun to service center p.35
- Dive mode activation p.36
- Before diving p.36
- Activation and prechecks p.36
- Battery power indication p.38
- Diving at altitude p.39
- Personal adjustments p.40
- Safety stops p.43
- The suunto rgbm model calculates deep stops iteratively placing the fi rst stop about halfway between the maximum depth and the ceiling depth after the fi rst deep stop is comp leted another deep stop will be prompted halfway to the cei ling and so on until the ceiling depth is reached p.45
- The suunto d9 allows the user to choose a deep stop al gorithm instead of the traditional recommended safety stop deep stops are decompression stops that occur deeper than traditional stops with the purpose of minimizing microbubble formation and excitation p.45
- The deep stop length can be set to 1 or 2 minutes p.45
- In this situation it is recommended to prolong your surface in terval time before your next dive p.45
- Enabling the deep stops disables the recommended safety stops but mandatory safety stops due to e g continuous as cent rate violations are still prompted p.45
- Deep stops p.45
- Dive mode settings p.46
- Depth alarm p.46
- Nitrox settings p.47
- Dive time alarm p.47
- Sampling rate p.48
- Personal altitude settings p.48
- Rgbm settings p.49
- Tank pressure p.49
- Safety stops deepstops p.49
- Wireless transmission setup p.50
- Installing the wireless transmitter p.50
- Hp code p.50
- Pairing and code selection p.51
- Transmission data p.53
- Table 5 pressure transmission related displays p.54
- If the dive is started without that the d9 and the transmitter have been properly paired the d9 will indicate that no cylinder data is available by displaying off fig 5 0e p.54
- Diving with the suunto d9 p.56
- Diving in air mode diveair p.56
- Basic dive data p.56
- Bookmark p.57
- Tank pressure data p.58
- Ascent rate indicator p.59
- Safety stops and deep stops p.60
- Decompression dives p.61
- Diving in nitrox mode diveean p.67
- Before diving in nitrox mode p.67
- Oxygen limit fraction olf p.69
- Oxygen displays p.69
- Gas change multiple breathing gas mixes p.70
- Diving in gauge mode divegauge p.71
- Using the compass in dive mode p.72
- Surface interval p.73
- At the surface p.73
- Dive numbering p.74
- The suunto d9 includes a dive planner that allows you to review the no decompressi on limits on a subsequent dive taking the residual nitrogen loading of previous dives in consideration the dive planning mode is explained in chapter 7 p.75
- Table 6 warning symbols p.75
- Repetitive dive planning p.75
- Changed and 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 plan ning mode will increment to the next higher number if another dive is made p.75
- Flying after diving p.76
- Audible and visual alarms p.77
- Error conditions p.79
- Memory mode p.81
- Dive planning mode memplan p.81
- Dive logbook memlog p.83
- Dive history memhis p.85
- Additional features p.86
- Suunto dive manager p.87
- Suuntosports com p.88
- Important information p.92
- Care of your dive computer p.92
- Care and maintenance p.92
- Water resistance inspection p.94
- Maintenance p.94
- Computer battery replacement p.95
- Battery replacement p.95
- Wireless transmitter battery replacement p.96
- Technical specification p.99
- Technical data p.99
- Suunto reduced gradient bubble model rgbm p.104
- Table 10 no decompression time limits min for various depths m for the first dive of a series p.106
- Table 10 no decompression time limits min for various depths ft for the first dive of a series p.107
- Oxygen exposure p.108
- Warranty p.110
- Glossary p.112
- Sub modes p.119
- Settings p.119
- Modes and settings p.119
- Compass light light compass light p.119
- Compass p.119
- M o s q u i t o p.122
- Duikcomputers p.122
- Www suunto com p.122
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Learn about altitude diving adjustments for dive computers, surface interval requirements, and oxygen exposure calculations for safe high-altitude diving.