Oceanic Data Mask Operating Manual - page 26
26
OPERATING MODES
The DataMask features 3 Operating Modes >>
NOR - for Normal Air or Nitrox dives
GAU - for dives with no Nitrogen/Oxygen calculations
FRE - for dives with no SCUBA
REMINDER: Once a dive is made in GAU Mode,
the DataMask is locked into that Operating
Mode for 24 hours after the dive.
SURFACE MODE
After activation and while the default Surface Main screen is
displayed, depressing the A (Top) button for 4 sec each time
steps through the operating mode Surface Main screens.
Fig. 14 - NOR MAIN >> GAU MAIN >> FRE MAIN
The Operating Mode selected (NOR, GAU, or FRE) will
remain on display for 2 hours until a dive is made or
another Operating Mode is selected.
If a dive has been conducted within the past 24 hours, the SURF
MAIN screen for that mode will be displayed until changed.
While operating in any Surface Mode, the DataMask will enter
Dive Mode upon descent to 5 FT (1.5 M) for 5 seconds.
Fig. 14C - FRE SURF MAIN
Fig. 14A - NOR SURF MAIN
Fig. 14B - GAU SURF MAIN