Cochran commander+ Owner's Manual page 28

DECOMPRESSION MODE: Should a no-decompression limit be mistakenly
overstayed, the COMMANDER+ will enter the Decompression Mode. In this mode, the
Ceiling digits will display the depth at which the diver must stop and not ascend above
during final ascent (the "TEMP" legend and digits will be replaced with the "CEIL" legend
and digits). The first Ceiling will be at three metres and continue in three metre
increments to a maximum of 27 metres. To alert the diver to an even more hazardous
situation, the CEILING digits will flash if the Ceiling is 21 metres or more.
The Remaining No-decompression Time and "NDC" legend will be replaced with
Decompression Time and "DEC" legend and the "WARNING" legend will come on.
Both STOP time and TOTAL time are displayed using the same set of digits. As
shipped from the factory (can be changed via Analyst ®
), STOP and TOTAL time will
alternate at the rate of once every two seconds. In this way, the diver can view not only
the time to spend at a particular STOP depth, but also the TOTAL time it will take to
complete all STOPS and surface. Clearly, the larger of the two alternating numbers is
the Total Decompression Time of all stops which includes ascent time to the surface,
and the smaller of the two numbers is the time required at the current stop. At the three
metre stop, the TOTAL and STOP times may be the same and therefore appear to not
alternate.
Predicted Decompression Time assumes that the diver is at exactly the required Ceiling.
However, it is not necessary to be precisely at the specified Ceiling. Outgassing credit
will be given that is proportional to a depth that is deeper than the specified Ceiling. A
small margin shallower than the Ceiling also exists. Should a Ceiling be violated (diver
is shallower than Ceiling), the Depth and Ceiling digits will flash as a visual warning and
a unique audible alarm will sound once per second. This warning will continue until the
Depth has been corrected. Remaining shallower than the Ceiling for five consecutive
minutes will immediately put the computer into the Gauge Mode.
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