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5.9.5. Personal adjustments
There are personal factors that can affect your susceptibility to DCI, which you can predict
in advance, and input into the decompression model. Such factors vary between divers
and also for the same diver from one day to another. The three-step Personal Adjustment
setting is available if a more conservative dive plan is desired and, for very experienced
divers, a two step adjustment for RGBM effect on repetitive dives is available
The personal factors which tend to increase the possibility of DCI include, but are not
limited to:
•
cold exposure - water temperature less than 20 °C/68 °F
•
below average physical fitness level
•
fatigue
•
dehydration
•
previous history of DCI
•
stress
•
obesity
•
patent foramen ovale (PFO)
•
exercise on or after dive
This featureis used to adjustthe computer tobe more conservative,according to personal
preference, by entering the suitablePersonal Adjustment setting with the help of Table 5.5,
Personal Adjustment settings.In ideal conditions, retain the defaultsetting, P0. If conditions
are more difficult, or any of the factors which tend to increase the possibility of DCI exist,
select P1, or even the most conservative P2. The dive computer then adjusts its
mathematical model according to the entered Personal Adjustment setting, giving shorter
no-decompression times (see Section 10.2.2. No-decompression limits, Table 10.1,
No-decompression time limits for various depths (m) and Table 10.2, No-decompression
time limits for various depths (ft) ).
Table 5.5. Personal Adjustment settings
Desired tablesCondition
Personal
adjustment
value
DefaultIdeal conditionsP0
Progressively more conservativeSome risk factors orconditions existP1
Several risk factors or conditions
exist
P2
The Suunto Cobra3 also allows experienced divers who are willing to accept a greater
level of risk to adjustthe RGBM model. The default setting is100%, which gives full RGBM
effect. Suuntostrongly advises you to use full RGBM effect. Statistically, very experienced
divers have less incidents with DCI. The reason for this is unknown, but it is possible that
some level of physiological and/or psychological accommodation can take place when
you are very experienced as a diver. Thus, for certain divers and diving conditions, it may
be desirable to set attenuated (50%) RGBM mode. See Table 5.6, RGBM model settings.
Table 5.6. RGBM model settings
EffectDesired TablesRGBM setting
Full RGBM effects
Standard SuuntoRGBM model
(Default)
100%
Smaller RGBM effects, higher risk!Attenuated RGBM model50%
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