Imagine you are very low on air and about to run out. If your regulator begins to free glow (releases lots of air at once) while underwater, you should: Hold the regulator without sealing your mouth around the mouth-piece and "sip" the air you need as you ascend (go up). In an out-of-air situation, while you are close to your buddy, what is the best thing to do? switch to your buddy's alternate air source.
The diver does not respond to directions.
The diver moves quickly and jerkily instead of slowly and calm. What are signs of a diver in distress (trouble) at the surface? The diver's head is high above the water, mask is off the face and regulator is out of their mouth. What the bottom is made of can cause big changes in: visibility Most injuries caused by aquatic animals happen because: the animal is trying to protect itself. How should you begin the dive? Dive against or into the current. Imagine you feel a mild current at the start of your dive. in midwater, you cannot see the surface or the bottom. You are most likely to become confused about which way is up or down _. If you and your buddy were separated underwater what would you generally do? Search for a minute underwater and then go up to find your buddy. You know you are properly weighted for diving if you: float at eye level holding a normal breath of air with an empty BCD.
As you descend (go down) towards the bottom, you wet suit will: compress (become smaller in thickness) from water pressure and you will lose buoyancy and warmth the deeper you go. Sound How should you move under water? Slowly and steadily If you work too hard and find it difficult to breathe underwater, you should: stop all activity and rest, hold onto something for support, if possible. This is why you cannot use it to tell direction very well. bigger, nearer _ travels faster in water. When you look at things underwater they often seem_ than when you look at them on the surface. What can you do to properly care for a scuba tank? Do not use all the air in the tank.
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