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bottom time

    0.01 sec.
bottom time [′bäd·əm ‚tīm]
(oceanography)
In an operation involving diving by personnel, the total time of a dive measured from the moment the diver passes below the water surface until the beginning of the ascent.


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Navy created the dive tables more than 30 years ago, and they provide information to the diver on nitrogen gas absorption based on depth and bottom time (time spent underwater not counting the ascent).
Prior to going under, you and your buddy should know the max depth you will go, the amount of bottom time you'll have and how much air you will start to ascend with.
From maximizing bottom time to calculating complex dive plans without compromising safety, these wrist computers are invaluable.
 
 
 
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