Term
| Ear equalization, or "clearing", should be --- --- upon descending and continued as you dive deeper, and should never be done --- |
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Definition
Started Immediately
Forcefully |
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Term
| If your sinuses are blocked, it is best not to --- until the problem is --- and they are open again |
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Definition
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| A common reaction to anxiety or fear is a ---, --- breathing pattern |
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Definition
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| Unless a diver ---, --- and gets --- under control, stress, and even panic may result. |
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Definition
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| To prevent carbon dioxide excess, avoid --- and dive with high quality, well maintained --- |
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Definition
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| Always breathe ---, never hold your breath; even if the --- is out of your mouth while under water, develop a habit of --- a steady stream of bubbles |
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Definition
Normally
Regulator
Exhaling |
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Term
| Proper weighting is what allows the diver to get under water and begin a descent. With proper weighting achieved, adjustment of --- under water is accomplished by --- air to or --- air from the BC |
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Definition
Buoyancy
Adding
Subtracting |
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Term
| Once neutrally buoyant at any depth, if you move into --- water, the air in your BC will expand and you will need to --- air from the BC until you become suspended |
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Definition
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Term
| Hearing is affected (underwater) because sound waves travel about --- times faster in water than in air |
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Definition
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Term
| A sound all divers need to know is the clanking of a diver's tool or other device against a --- ---. This is a signal to get another diver's attention |
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Definition
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Term
| The body loses heat faster in water than it does in air; --- times faster. |
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Definition
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Term
| When body temperature is allowed to drop to 95°F, --- sets in |
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Definition
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| Failure to keep an open airway to the lungs upon ascent can result in one of four --- injuries |
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Definition
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| During the process of releasing nitrogen from the tissues, it is important that the diver comes up --- enough to allow the --- to stay in solution in the tissues and blood while it is being released |
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Definition
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| The proper rate of ascent is ---, per minute |
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Definition
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Term
| Write all contact information in your --- --- --- |
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Definition
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| While it is important to know emergency precautions, --- --- divers who use good --- should never need to use them, or make it necessary for others to use them. |
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Definition
Properly Trained
Judgement |
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Term
| After your ascent, when you reach the surface, inflate the ---, do a weight system check, keep your --- in place, and either keep the --- in place or switch to snorkel breathing |
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Definition
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Term
| An emergency --- ascent is essentially the same as a normal ascent except that you are prepared to ditch your weight system for immediate positive buoyancy if necessary. |
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Definition
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Term
| If you are confused or panicked and there is no doubt about which ascent to use, ditch the weights and do the --- ascent |
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Definition
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