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Diving with Subgear XP-3G
3.6 Diving in mountain lakes
3.6.1 Altimeter
The altitude adjustment ->84 does not affect altitude ranges nor any calculations.
3.6.2 Altitude ranges
Altitude range 2
Altitude icon
Subgear XP-3G measures the atmospheric pressure every 60 seconds even while the
display is switched off. If the computer detects a sufficient increase in altitude, it switches
on automatically and indicates the new altitude range (1-4) and the desaturation time.
Desaturation time indicated at this moment refers to adaptation time at this altitude. If the
dive starts within this adaptation time, Subgear XP-3G treats it as a repetitive dive, since the
body is offgassing.
Altitude is divided into five ranges, which are influenced by barometric pressure. That is
why the defined altitude ranges overlap on their fringes. If a mountain lake is reached, the
altitude range is indicated at the surface (time of day display), in the logbook and in the
dive planner by a stylized mountain and the current altitude range. Sea level to an altitude
of approximately 1000m (3300ft) is not indicated. In the following diagram, you can see the
approximate breakdown of the altitude ranges:
Altitude ranges
No deco data
gauge mode
Switching
at approx.
610mbar
8.85psi
725mbar
10.51psi
815mbar
11.82psi
905mbar
13.12psi
4000m
13120ft
3000m
9840ft
2000m
6560ft
1000m
3280ft
0m
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