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AMPHOS DC MANUAL
© 2002 Design, 2012 Doc. No. 12-5301-r01 (12/17/12)
DECOMPRESSION
Decompression mode activates when theoretical No Decompression time and depth limits (NDLs) are exceeded.
Upon Entry into Deco, the Audible will sound until acknowledged or time out of 10 seconds. While it is sounding, the UP Arrow
icon and graphic DECO will flash to alert you.
DECO ENTRY, information includes (Fig. 75)
> Stop Depth with STOP and FT (or M) icons.
> Stop Time (hr:min).
> UP Arrow icon, flashing until you ascend to within 10 FT (3 M) below the Stop Depth indicated, then it is removed.
> Current Depth with FT (or M) icon.
> TAT (min) with TAT and min icons.
TAT represents Total Ascent Time which includes time required for all deco stops plus
vertical ascent time to the surface.
> Graphic DECO, flashing while audible sounds then blank.
> Gas (tank) icon, one in use (1 or 2).
> NX icon, if Nitrox.
> Full NIBG with N2 icon.
> ASC while ascending.
• S (< 2 sec) to acknowledge/silence the Audible.
• L (press) to activate Backlight.
NOTE: Upon entry into Deco, the Deep and Safety Stop features are disabled for the remainder of
that dive, even if No Deco status is regained.
MANAGING DECOMPRESSION STOPS
To fulfill your decompression obligation, you should make a safe controlled Ascent to a depth slightly deeper than, or equal to,
the Stop Depth indicated and decompress for the Time indicated.
The amount of decompression credit time that you receive is dependent on Depth, with slightly less credit given the deeper you
are below the Stop Depth indicated.
DECO STOP MAIN, information includes (Fig. 76) -
> Stop Depth with STOP and FT (or M) icons.
> Stop Time (hr:min).
> Current Depth with FT (or M) icon.
> TAT (min) with TAT and min icons.
> Gas (tank) icon, one in use (1 or 2).
> NX icon, if Nitrox.
> Full NIBG with N2 icon.
• A (< 2 sec) to view ALTs (similar to those for DS).
• M (2 sec) to access the Gas Switch Preview.
• S (< 2 sec) to acknowledge/silence alarms.
• L (press) to activate Backlight.
CONDITIONAL VIOLATION (CV)
If you ascend above a calculated Deco Stop, no off gassing credit will be given. While above the Stop, a penalty time equal
to 1 +1/2 minutes will be added to Stop Time for each minute above the Stop. If you descend below the Stop Depth before 5
minutes elapse, operation will continue to function in Deco and off gassing credit will resume.
CV MAIN, information includes (Fig. 77) -
> Stop Depth with STOP and FT (or M) icons.
> Stop Time (hr:min).
> Down Arrow icon flashing until below the Stop Depth indicated..
> Current Depth with FT (or M) icon.
> TAT (min) with TAT and min icons.
> Graphic DOWN flashing while the audible sounds, then blank.
> Gas (tank) icon, one in use (1 or 2).
> NX icon, if Nitrox.
> Full NIBG with N2 icon.
• A (< 2 sec) to view ALTs (similar to those for DS).
• M (2 sec) to access the Gas Switch Preview.
• S (< 2 sec) to acknowledge/silence alarms.
• L (press) to activate Backlight.
Fig. 75 - DECO ENTRY
(during audible)
Fig. 76 - DECO STOP MAIN
Fig. 77 - CV MAIN