Suunto Cobra2 User Manual download pdf (Page 23)

5.9.4. Diving at altitude

The dive computer can be adjusted both for diving at altitude and also to increase the

conservatism of the mathematical nitrogen model.

When programming the instrument for the correct altitude, you need to select the correct

Altitude Adjustment settings according to Table 5.4, Altitude Adjustment settings. The dive

computer will adjust its mathematical model according to the entered altitude setting, giving

shorter no-decompression times at higher altitudes (see Table 9.1, No-decompression

time limits for various depths (m) and Table 9.2, No-decompression time limits for various

depths (ft) in Section 9.2. RGBM).

Table 5.4. Altitude Adjustment settings

Altitude rangeAlt. adjustment value

0 - 300 m / 0 - 1000 ftA0

300 - 1500 m / 1000 - 5000 ftA1

1500 - 3000 m / 5000 - 10 000 ftA2

NOTE

Section 5.8.4. Setting the personal/altitude adjustments describes

how the Altitude value is set.

WARNING

Traveling to a higher elevation can temporarily cause a change in the

equilibrium of dissolved nitrogen in the body. It is recommended that

you acclimatize to the new altitude by waiting at least three hours

before diving.

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

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) ).

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Suunto Cobra2 User Manual Page 23

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