Oceanic DataMax Pro, Owner'S Manual

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22
ing the DataMax Pro constantly monitors two critical pieces of information;
no-decompression status and air consumption. The Dive Time Remaining
display shows whichever is more important to you at any particular moment
in time; the least amount of either AIR or NO DECOM Dive Time.
It does the diver little good to know that he or she has 20 minutes of no-
decompression time remaining if they only have 10 minutes of air time in
reserve. Conversely, if the diver has 20 minutes of air remaining, more
pertinent information would be that he or she has only 10 minutes left of no-
decompression time. This is why the unique Dive Time Remaining display
was granted U.S. Patent No. 4,586,136. It presents a clear concise display
uncluttered with less-important, and easily misunderstood, information.
Air Time Remaining
As part of the Dive Time Remaining display, Air Time will appear only
when it is less than No-decompression Time. Air Time Remaining is calcu-
lated using a patented* algorithm that measures tank pressure once each
second. It then calculates Air Time Remaining based upon an average of how
much air was used each second over ninety seconds. It also takes into ac-
count how depth affects the diver’s air consumption. This responsiveness is
what makes the Air Time Remaining display so unique. The air samples are
taken frequently enough to let the display react to changes in breathing rate,
but not so often that it appears erratic or confusing.
A good example of when this responsiveness becomes useful is when a
buddy starts breathing from your octopus, or when you suddenly find your-
Fig. 20 – Air Time Remaining
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