Personal Adjustments - Suunto D9 User Manual

5.10.5. 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 5.7, 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) ).
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