Suunto D9 manual Diving at altitude, Alt. adjustment value Altitude range

5.10.4. 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 5.6, 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 5.6. Altitude Adjustment settings

Alt. adjustment value	Altitude range
A0	0 - 300 m / 0 - 1000 ft
A1	300 - 1500 m / 1000 - 5000 ft
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.

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