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High priority alarms:
Alarm Explanation
High priority alarm
followed by 'Start
ascending' beep,
repeated for maximum
three minutes
PO
2
value blinks
PO
2
value greater than the adjusted
value. Current depth is too deep for
the gas in use. You should immediately
ascend or change to a lower O
2
% gas.
High priority alarm
followed by 'Start
descending' beep,
repeated for maximum
three minutes Er blinks
and an arrow points
downwards.
Decompression ceiling depth
exceeded. You should immediately
descend to, or below, the ceiling.
High priority alarm,
repeated three times.
SLOW blinks.
Maximum ascent rate of 10 m/min (33
ft/min) exceeded. Slow down your
ascent rate.
Low priority alarms:
Alarm type Alarm reason
Low priority alarm
followed by 'Start
No-decompression dive becomes a
decompression stop dive. Depth is
20