
20
As you ascend from depth following a dive that has
approached the no decompression limit, the Nitrogen Bar
Graph will recede as control shifts to slower compart-
ments. This is a feature of the decompression model that is
the basis for multilevel diving, one of the most important
advantages that Aeris dive computers offer.
The no decompression algorithm is based upon Haldane’s
theory using maximum allowable nitrogen levels developed
by Merrill Spencer. Repetitive diving control is based upon
experiments designed and conducted by Dr. Ray Rogers
and Dr. Michael Powell in 1987.
Oxygen Accumulation Time Remaining
Oxygen accumulation (exposure) during a dive, or 24 hour
period, appears graphically as the Oxygen Accumulation
(O2) Bar Graph (Fig. 14a). As time remaining before
reaching the oxygen exposure limit decreases, segments
are added to the O2 Bar Graph.
When the amount of time remaining before reaching the
oxygen limit becomes less than the No Decompression Dive
Time Remaining, calculations for that depth will be con-
trolled by oxygen. Oxygen Time Remaining will then ap-
pear as the main numeric time display (Fig. 14b) as signified
by the O2 Time icon appearing on the display. As oxygen
accumulation continues to increase, the O2 Bar Graph will
enter the yellow Caution Zone.
Fig. 14 - O2 Accumulation
Dive Time Remaining
a
b
Summary of Contents for XP5
Page 1: ...SEEMANN XP 5 OWNER S GUIDE ...
Page 7: ...7 FEATURES and DISPLAYS ...
Page 45: ...45 PRE DIVE PLAN MODE ...
Page 65: ...65 POST DIVE MODES ...
Page 75: ...75 SIMULATOR DEMO MODE ...
Page 83: ...83 CARE MAINTENANCE and SERVICE ...
Page 91: ...91 REFERENCE ...
Page 106: ...106 NOTES ...