![]() Snorkel System components: Mask, fins, boots, mesh bag, and snorkel. ![]() The 6 Systems of Diving Equipment and Gear: Six Systems: Snorkel, Exposure, Delivery, Information, Buoyancy and Accessory. The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water is: 4 ATA Proper equalization techniques must be learned in order to: Prevent squeeze injuries, sinus squeeze and ear pain. 64/62.5 Body heat is lost underwater _ than in air. Salt water weighs _ pounds per cubic foot and freshwater weighs _ pounds per cubic foot. ![]() The purpose of equalization is to: Introduce additional air into body air spaces in response to increasing external pressure. The first symptom of a sinus squeeze is usually: A sharp pain of wedging sensation above the eyes. ![]() Which of the statements concerning sound transmission underwater is correct? Sound travels four times faster in water than in air sound travels farther underwater than air divers find it difficult to locate the source of the sound underwater. Gauge pressure is defined as: Absolute pressure minus 1 ATA Sinus squeeze can be prevented by: Not diving with a cold. The condition in which certain colors are diminished as depth increases is called: Absorption.
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