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15 Cards in this Set
- Front
- Back
An object is neutrally buoyant when it displaces an amount of water less than its own weight?
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False, when it displaces less is negative, positive is when it displaces more, so its neutrally buoyant
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buoyancy control on the surface?
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you can save energy and rest
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buoyancy control underwater?
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you can move freely in all directions and avoid damaging aquatic life
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the same object would be more buoyant in_________, than it would be in________.
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Saltwater, Freshwater
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What is a squeeze?
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A condition that causes pain an discomfort when the pressure outside an air space of your body is less than the pressure inside an air space.
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Technique to equalize during descent?
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Block your Nose and attempt to gently blow through it.
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True or False: Because water is denser than air the pressure change for a given distance ascent or descent is significantly greater in water than in air.
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True
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How often you should equalize during descent?
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Every metre/few feet
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True or false: If you feel discomfort in your ears while descending you should continue descending until the discomfort is gone?
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False.
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The most important rule in scuba diving is?
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Never never never hold your breathe.
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What is a Reverse Block?
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A condition that occurs when expanding air cannot escape from a body air space during ascent, causing pain and discomfort.
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what you should do if you feel discomfort while ascending due to air expansion?
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Slow or stop ascending and give the trapped air time to work its way out.
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Why your nose has to be enclosed in the mask?
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So you can equalize your mask.
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Explain the best way to prevent water from entering your scuba cylinder.
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To don't let it be completely empty.
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The most important consideration for a regulator is?
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Ease of breathing
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