bottom time

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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References in periodicals archive ?
That way you can spend more of your bottom time where your chances are greatest.
Acquisition time had to be less than twenty minutes, which is the bottom time for the divers.
When you're at the bottom time is never on your side, but would Town making a management change - as some fans want - really help?
We will have more bottom time than any previous human visitors to the site, because we dive with mixed gas rebreathers,'' the expedition's website said.
To avoid soggy bottom time, turn your oven down a tad and bake for a long time – keep going all the way until the very edges of your fruit is erring on the side of too dark.
Typical bottom time is estimated to be half and hour.
Advanced technology enables the rebreather to constantly monitor the levels of oxygen and carbon dioxide and partial pressure in the loop to calculate bottom time and maximum depth even with multi-level deep dives.
In over 13 h of continual bottom time, no fish were encountered (11).
Each of the seventeen divers in the 544th logged at least 350 hours of bottom time over their 10-week deployment in Operation Unified Response.
Hebburn is in the bottom time villages for life expectancy.
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).
And because the diving is shallow, the bottom time for divers is extended way beyond normal--I'm generally down for 90 minutes before I even think of coming up.