A&D 2 Plus - Manual (Page 4)

Optical
Alarm
Ascent
Rate
Acoustic
Alarm
WARNING: Reduce your ascent speed whenever the
above alarms appear. Failure to do so may lead to serious
injury or death due to decompression sickness.
NO-STOP TIME
No-Stop Time is the amount of time you can stay at the current
depth without making required decompression stops. This number is
displayed in minutes, with 99 being the highest number displayed.
If 99: is displayed, you have 99 minutes or more of no-stop remain-
ing. No-stop time is easily identified by the no-stop arrow located
directly above it.
WARNING: It is unsafe diving practice to “push” the M2+,
or any other decompression tool, to its limits. Avoid no-
stop times of less than 3 minutes at any given depth.
WARNING: There is an acoustic alarm if no-stop time is
less than one minute. In this last minute, the no-stop
display shows a flashing 0. In order to prevent a decom-
pression dive, you must ascend immediately.
No-stop time at 0
minutes remaining
No-Stop Time
Display
DECOMPRESSION STOP INFORMATION
If you exceed the no-stop limits, the
Monitor 3 will replace the no-stop time
with the deepest (first) decompression
stop depth (in feet) along with the
amount of decompression time (in
minutes) at that depth. When a decom-
pression stop has been completed, the
next shallower decompression stop is
displayed, along with its required stop
time. When all decompression stops are
completed, the DECO arrow disappears
and the NO STOP arrow reappears.
Decompression Stop
Information:
Diver must make a 20-foot stop
for 3 minutes
WARNING: If you ascend shallower than the required
decompression stop depth, the DECO arrow will start
flashing and an acoustic alarm will sound. Due to the
formation of microbubbles, decompression obligation can
increase greatly if a decompression stop is ignored. When
the surface is reached during the decompression alarm,
the DECO arrow continues to flash to point out the risk of
a decompression accident. If you do not descend
immediately to the required stop depth, the Monitor 3 will
enter SOS Mode. Any decompression violation longer
TOTAL ASCENT TIME
Total Ascent Time is the addition of all the
decompression stop times plus the amount of
time it takes to ascend from the current depth
to the first decompression stop.
Note: Total ascent time is calculated with an
optimal ascent rate of 100% and normal work-
load. High workloads and different ascent rates
may change the total ascent time.
SOS MODE
If you ignore your decompression stop and
return to the surface (shallower than 4 feet)
for more than three minutes, the M2+
switches to SOS Mode. In SOS Mode, the
computer displays SOS instead of current
depth. While in SOS Mode, the computer
cannot be used for 24 hours. SOS Mode can
influence the computer's calculations for up
to three days after the incident due to the
presence of microbubbles.
Total Ascent Time
Display
SOS Mode Display
FUNCTIONS AT THE
SURFACE
WAIT MODE
After reaching the surface, the M2+
automatically switches into Wait Mode for
five minutes. This is the amount of time
necessary to recognize the end of the dive.
The five minute delay allows you to come to
the surface to orient yourself, then resume
the dive. If you stay at the surface longer
than 5 minutes, the dive is entered into the
logbook and the M2+ switches into surface
mode.
Wait Mode Display