The Underwater World
"There you are, totally weightless, quietly soaring just above the sea floor with only the smallest amount of physical exertion. Small fish come out of their holes to look at you. How about that? You are the curiosity. You are the thing that does not belong. Perhaps this is why you dive. You are taking part in exploring man's last ecological frontier. The very thought would excite anyone whose blood still flows in his veins. The diver is the observer, he looks at everything he can. He totally forgets the outside world" (Reseck 4). When I first read this piece, I got goosebumps. For years man has explored this vast universe, spending millions of dollars, and only making a tiny scratch on its surface. For me, to be able to explore a world completely different from mine sounds like an opportunity of a lifetime. When I had to choose a topic for my senior project, scuba diving was the most compelling of all. This paper is about the development and use, the techniques, and the physiological concerns of scuba diving. Man underwater dates all the way back to the Iliad, but sports diving for fun and for a profession is fairly new. If one has ever been underwater, he should know that
The only drawback of learning how to scuba dive is the cost. Let the weight of the legs force the body to submerge. Hyperventilation, or shallow water blackout, has more potential to occur on skin dives rather that scuba dives, but may occur on both. Now you should have a clear snorkel (Counsilman and Drinkwater 33). Do not kick until the feet are below the surface, then either kick for greater depth or straighten out for an underwater swim (Counsilman and Drinkwater 29). To treat hyperventilation, the airway should be opened by hyperextending the neck, mouth-to-mouth respiration may not be necessary if the carbon dioxide level build up and triggers the breathing mechanisms, which often happens (Griffiths 85). With palms facing forward, bring the arms up forcibly, in line with the head, and lift both legs--straight and together--out of the water so that they, too, form a straight line with the body. In shallow water, it is easier to walk backwards if you move slowly and slide the feet along the bottom. With increasing depth, the partial pressure of nitrogen also increases. At the bottom, the diver with nitrogen dissolved in the tissues and bloodstream experiences no apparent problems. Walking in fins on land should not be done because they are extremely awkward and could cause a fall. Common errors are failing to tilt the mask toward the surface, pressing the top edge so tightly against the face that the mask is pulled away from other parts of the face, and allowing air to escape under the top edge of the mask by failing to hold the mask firmly in place (Counsilman and Drinkwater 31-33).
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Acceptance Essays
