Dive Alerts - Garmin DESCENT MK3 Series Owner's Manual

Dive Alerts

Alert Message
None
None
%1 OTU accumulated.
End your dive now.
250 OTU accumulated.
Approaching Deco Stop
Approaching NDL
Ascending too fast. Slow
your ascent.
Battery critically low. End
your dive now.
Battery is low.
Continuing on %1. Switch
at any time.
CNS toxicity at %1%. End
your dive now.
CNS toxicity at 80%.
Decompression Cleared
Descend below deco
ceiling.
Descend to complete
safety stop.
26
Cause
You completed the decompression stop.
Your partial pressure of oxygen (PO2)
value is above the specified warning
value.
Your oxygen toxicity units are above the
safe limit. During a dive, "%1" is replaced
with the number of units accumulated.
Your oxygen toxicity units (OTU) are at
250 units, and you are nearing the safe
limit of 300 units.
You are within one stop interval (3 m or
9.8 ft.) of the decompression stop depth.
You have 10 minutes of no decompres­
sion limit (NDL) time remaining.
You are ascending faster than 9.1 m/min.
(30 ft./min.) for more than 5 seconds.
Less than 10% battery power remains.
Less than 20% battery power remains.
You selected Not Now when prompted
to switch to a higher-oxygen gas, or you
ignored the prompt.
Your CNS oxygen toxicity is too high.
During a dive, "%1" is replaced with your
current CNS percentage.
Your central nervous system (CNS)
oxygen toxicity is at 80% of the safe limit.
You completed all decompression stops. None
You are more than 0.6 m (2 ft.) above the
decompression ceiling.
You are more than 2 m (8 ft.) above the
safety stop ceiling.
Watch Action
The decompression stop depth and
time flash blue for five seconds.
Your PO2 value flashes yellow.
The alert appears every two minutes, up
to three times.
None
None
The alert appears again when you have
5 minutes of NDL time remaining.
None
The alert appears when the watch is
below 10% battery power and on the
dive pre-check screen for your next
dive.
The alert appears when the watch is
below 20% battery power and on the
dive pre-check screen for your next
dive.
The watch marks the gas as a backup
and updates decompression guidance
accordingly.
The alert appears every two minutes, up
to three times.
The alert appears during a dive and on
the dive pre-check screen for your next
dive.
The current depth and stop depth flash
red.
If you remain above the decompression
ceiling for more than three minutes, the
decompression lockout feature goes
into effect.
The current depth and stop depth flash
yellow.
Diving