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9 Cards in this Set
- Front
- Back
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When is it considered cold water diving operations?
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When diving under/near ice cover or in water at or below a temperature of 37°F
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What should the diver not do in the water to avoid regulator freezing?
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Purging the second stage of the regulator, when on the surface, kept the regulator submerged and avoid breathing from it.
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What are the requirements in regards to regulators and bottles when the water temperature is at or below 37°F?
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1. A redundant SCUBA system (twin SCUBA bottles, each having a K-valve and an approved cold water regulator) or twin SCUBA bottles with one common manifold and an approved cold water regulator (with octopus) shall be used.
2. Single-hose regulators should be equipped with an antifreeze cap 3. Extra precautions must also be taken to make sure that SCUBA cylinders are completely dry inside, that moisture-free air is used, and that the regulator is thoroughly dried prior to use. |
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What special precautions are required in regards to the life preservers when diving under ice?
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The use of life preservers with CO2 actuation is prohibited only when diving under ice.
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When using the hot water suit, what must be worn underneath it?
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Wet suit liner
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What are the recommended shapes and dimensions of the water entry hole when diving under ice?
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The hole should be a rectangle 6 feet by 3 feet, or a triangle with six-foot sides
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Besides the water entry hole, what other holes must be cut in the ice when diving in a river or bay where there is a current or tidal stream?
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Downstream escape holes or emergency exit holes
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True or False: Diving under the ice or in extremely cold waters requires the use of paired dive partners.
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True
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How long should the standby divers tending line when diving under ice?
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Should be twice the length of the diver’s lifeline in order to perform a thorough circular search
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