Apnea Mode ("Apnea") - Uwatec M2 User Manual

The M2 will show neither the remaining
desaturation time nor the CNS O
on the surface in GAUGE mode. It will,
however, display a surface interval up to
48 hours and a 48-hour NO-FLY time. This
NO-FLY time is also the time during which
you cannot switch back to computer mode.
During a dive in GAUGE mode, the M2
displays a stopwatch in the bottom row.
The stopwatch can be stopped by pressing
the -/DOWN button. When the stopwatch
is stopped, it can be reset and restarted by
a press-and-hold of the -/DOWN button.
While in GAUGE mode, the average depth
can be reset. To reset the average depth,
press and hold the +/UP button.
As in SCUBA mode, press the +/UP button
to view the time of day and other alternate
information on the top row. For example, in
the display below the time of the day has
been selected (14:52).
Alternate info can be selected by pressing
the +/UP button in the following order:
1. Tank 1 pressure.
2. Tank 2 pressure, if transmitter paired.
3. Tank d pressure, if transmitter paired.
M2 USER MANUAL
4. Max depth (after a 1m/3feet ascent is
% value detected).
2
5. Average depth.
6. Temperature.
7. Heart rate.
8. Skin temperature
(if SCUBAPRO belt is used).
9. Current time of the day.
After a dive, the GAUGE mode surface
display shows the dive time on the middle
row. On the bottom row the stopwatch
is running from the dive start or the
last manual restart. On the top row the
maximum depth of the dive is shown. After
a 5-minute timeout the display changes to
the GAUGE mode menu.

4.13 APNEA mode ("APNEA")

The M2 has an advanced APNEA diving
mode. The main features include a faster
sampling rate than in normal SCUBA mode
and alarm functions tailored to apnea diving.
The M2 measures the depth in APNEA
mode every 0.25 seconds to ensure the
precise maximum depth. In the logbook
the data is saved in 1-second intervals.
The increased amount of data being saved
requires more storage space; therefore,
you can store approximately 10 hours of
log data in APNEA mode.
In APNEA mode it is also possible to start
and stop the dive manually by a press-
and-hold of the -/DOWN button. This way
you can use the M2 for static apnea dives
where a normal dive start depth of 0.8m will
not start a new dive.
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