Oceanic VEO 100 Nx Manual page 51

ALTITUDE COMPENSATION
ALTITUDE COMPENSATION
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At an Altitude of 2,000 feet (610 meters), it will
automatically recalibrate itself to measure depth
in feet of fresh water rather than feet of sea
water. It will then readjust the no decompression
and oxygen limits at additional intervals of
1,000 feet (305 meters). Therefore, when
returning to lower Altitudes, diving should not be
conducted until the unit automatically clears of
any residual nitrogen and oxygen loading and
resets to operate at the new lower Altitude.