umbilical, bundle of tubes serving a diver's diverse needs, Valsalva maneuver, process to force gas up the eustachian tube, vent/ventilate, allows gas to escape through an opening, ventilation, circulation and exchange of gases in the lungs, ventricle, lower chamber of the heart which takes blood from the atrium, vertigo, false sense of whirling, dizziness, loss of balance, vessel, a craft larger than a rowboat, vital capacity, the volume of air that can be expelled from the lungs, volatile, explosive, unstable, evaporating readily, watchstation diving officer, responsible for safely and successfully conducting the diving operation, weight belt, used to carry lead bars to create negative buoyancy, wet suit, most common form of protection; traps a thin layer of water next to the driver's skin, wreck, a ship which has been destroyed at sea.

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