Sound travels about four times faster in water than in air. 13) When I look at things underwater they often seem _ than they look on the surface. See Being a Diver II - Seeing and Hearing as a Diver.
This makes objects appear larger and closer than they really are. Instrument console/gauges/computer A Larger and/or nearerĪs light travels through water and into your mask, it bends, or refracts. Please choose the correct number for the choices below. Each regulator part has a number next to it. The first stage is the "hub" of your regulator and supplies air to the components - the second stage, alternate air source, low pressure inflator hose and SPG/dive computer. Your regulator consists of five components. 11) Which of the following is part of proper care for my scuba cylinder?ĭ Have it pressure tested every month. Store it standing in a safe place and keep it away from high heat. Also, have it pressure tested at required intervals, usually two to five years. You should keep some air in the cylinder to prevent moisture from entering and causing corrosion.
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