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During the dive, the divers shall adhere to the following
guidelines:
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Know and observe the oxygen exposure limits.
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Observe the UBA canister limit for the expected water temperature [see
NAVSEA 10560 ltr ser 00C35/3215, 22 Apr 96].
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Wear the appropriate thermal protection.
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Use the proper weights for the thermal protection worn and for equipment
carried.
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Wear a depth gauge to allow precise depth control. The depth for the pair of
divers is the greatest depth attained by either diver.
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Dive partners check each other carefully for leaks at the onset of the dive. This
should be done in the water after purging, but before descending to transit
depth.
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Dive partners check each other carefully for leaks at the onset of the dive. This
should be done in the water after purging, but before descending to transit
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Swim at a relaxed, comfortable pace as established by the slower swimmer of
the pair.
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Maintain frequent visual or touch checks with buddy.
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Be alert for any symptoms suggestive of a medical disorder (CNS oxygen toxicity,
carbon dioxide buildup, etc.).
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Use tides and currents to maximum advantage.
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Swim at 25 fsw or shallower unless operational requirements dictate
otherwise.
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Use the minimum surface checks consistent with operational necessity.
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Minimize gas loss from the UBA.
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Do not use the UBA breathing bag as a buoyancy compensation device.
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Do not perform additional purges during the dive unless the mouthpiece is
removed and air is breathed.
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If an excursion is taken, the diver not using the compass will note carefully the
starting and ending time of the excursion.
The diver shall be thoroughly familiar with the
malfunction procedures unique to his UBA. These procedures are described in the
appropriate UBA MK 25 Operational and Maintenance Manual.
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