Suunto HELO2 manual How the Altitude value is set, Before diving, Personal adjustments

Alt. adjustment value		Altitude range
A2		1500 - 3000 m / 5000 - 10 000 ft
NOTE	Section 5.9.4. 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.

5.10.5. 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 five-step Personal Adjustment setting is available if a more conservative or aggressive dive plan is desired.

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 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. For very experienced divers willing to take high personal risks and full responsibility of their own condition, two negative values of the personal adjustments, P-2 and P-1, exist.The dive computer then adjusts its mathem- atical model according to the entered Personal Adjustment setting, giving shorter no-de- compression times.

Table 5.5. Personal Adjustment settings
Personal adjust- Condition		Desired tables
ment value
P-2	Ideal conditions, excellent physical	Progressively less conservative
	fitness, highly experienced with a lot
	of dives in the near past
P-1	Ideal conditions, good physical fit-
	ness, well experienced with dives in
	the near past
P0	Ideal conditions	Default

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