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A dive computer or decompression meter is a
device used by a scuba diver to measure the time
and depth of a dive so that a safe ascent rate
can be calculated and displayed so that the
diver can avoid decompression sickness.
Dive computers
address the same problem as decompression
tables, but are able to perform a continuous
calculation of the partial pressure of inert
gases in the body based on the actual depth and
time profile of the diver. As the dive
computer automatically measures depth and time,
it is able to warn of excessive ascent rates and
missed decompression stops and the diver has
less reason to carry a separate watch and depth
gauge. Many dive computers also provide
additional information to the diver, for
example, the water temperature, information on
the diver's oxygen toxicity or the pressure of
the remaining breathing gas in the diving
cylinder.
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