SUUNTO Vyper2 - Manual (Page 23)

5.8.5. 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
This feature is used to adjust the computer to be more conservative, according to personal
preference, by entering the suitable Personal Adjustment setting with the help of Table 5.5,
Personal Adjustment settings. In ideal conditions, retain the default setting, 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 9.2.2. No-decompression limits, Table 9.1, No-
decompression time limits for various depths (m) and Table 9.2, No-decompression time
limits for various depths (ft) ).
Table 5.5. Personal Adjustment settings
Desired tables Condition Personal
adjustment
value
Default Ideal conditions P0
Progressively more conservative Some risk factors or conditions exist P1
Several risk factors or conditions
exist P2
The Suunto Vyper2 also allows experienced divers who are willing to accept a greater
level of risk to adjust the RGBM model. The default setting is 100%, which gives full RGBM
effect. Suunto strongly 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
Effect Desired Tables RGBM setting
Full RGBM effects Standard Suunto RGBM model
(Default) 100%
Smaller RGBM effects, higher risk! Attenuated RGBM model 50%
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