Oceanic Watch / Dive Computer GEO - Manual (Page 128)

128
ALTITUDE SENSING AND ADJUSTMENT
Prior to the first dive of a series of repetitive dives, ALTITUDE (i.e., Ambient
Pressure) is measured upon activation of Dive Surface Mode and every 15 minutes
until a dive is made or operation reverts to Main Time after 2 hours.
> While it is operating in Watch Modes after a dive, measurements are taken
every 15 minutes during the 24 hour period after surfacing.
> Measurements are only taken when the unit is dry.
> Two readings are taken, the second reading 5 seconds after the first. The
readings must be within 1 foot (30 cm) of each other to record that Ambient
Pressure as the current ALTITUDE.
The Mathematical Model in the GEO accounts for the reduced No Decompression
dive Time available based on National Oceanic and Atmospheric Administration
(NOAA) guidelines.
When diving in high altitude waters from 2,000 to 14,000 feet (610 to 4,270
meters), the GEO automatically adjusts to these conditions providing corrected
Depth, reduced No Decompression Times, and reduced Oxygen Accumulation
Times at intervals of 1,000 feet (305 meters).
No adjustments are made during any time that the Wet Contacts are bridged.
At an elevation of 2,000 feet (610 meters), Depth Calibration automatically
changes from feet of seawater to feet of fresh water. This is the first adjustment to
the Algorithm.