U. S. Navy Diving Manual: Air Diving

Front Cover
DIANE Publishing, 1999 - Sports & Recreation - 300 pages
Presents comprehensive information on air diving operations. It contains data and information from all groups within the Navy diving community, and reflects state-of-the-art diving capabilities of the U.S. Navy. New equipments appearing for the first time include the Underwater Breathing Apparatus (UBA) MK 20 MOD 0, UBA MK 21 MOD 1, the Light Weight Diving System (LWDS) MK 3 MOD 0, and the Transportable Recompression Chamber System (TRCS). Appendices: changes in the deployment of standby divers in ships husbandry diving, changes in treatment tables and new correction factors and guidance relating to the use of pneumofathometers.

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Page 2-19 - The total pressure exerted by a mixture of gases is equal to the sum of the partial pressures of the gases in the mixture.
Page 4-9 - Very high waves with long overhanging crests; the resulting foam, in great patches, is blown in dense white streaks along the direction of the wind ; on the whole, the surface of the sea takes a white appearance; the tumbling of the sea becomes heavy and shock-like; visibility affected.
Page 2-22 - The amount of any given gas that will dissolve in a liquid at a given temperature is a function of the partial pressure of that gas in contact with the liquid and the solubility coefficient of the gass in the particular liquid.
Page 7-5 - Each depth listed in the No-decompression Table has a corresponding no-decompression limit given in minutes. This limit is the maximum bottom time that a diver may spend at that depth without requiring decompression. The columns to the right of the no-decompression limits column are used to determine the repetitive group designation which must be assigned to a diver subsequent to every dive.
Page 7-1 - When the diver begins to ascend, the process is reversed as the nitrogen partial pressure in the tissues exceeds that in the circulatory and respiratory systems. The pressure gradient from the tissues to the blood and lungs must be carefully controlled to prevent too rapid a diffusion of nitrogen. If the pressure gradient is uncontrolled, bubbles of nitrogen gas can form in tissues and blood which results in the development of decompression sickness.
Page 7-16 - Table is composed of various intervals between 10 minutes and 12 hours, expressed in minutes: hours (2:21 = 2 hours 21 minutes). Each interval has two limits, a minimum time (top limit) and a maximum time (bottom limit). Residual nitrogen times, corresponding to the depth of the repetitive dive, are given in the body of the lower portion of the table. To determine the residual nitrogen time for a repetitive dive, locate the diver's repetitive group designation from his previous dive along the diagonal...
Page 7-5 - No-Decompression Limits and Repetitive Group Designation Table for No-Decompression Air Dives The No-Decompression Table serves two purposes. First it summarizes all the depth and bottom time combinations for which no decompression is required.
Page 2-28 - The calorie is the heat required to raise the temperature of a gram of water one degree Centigrade.
Page 3-3 - Inside these air sacs, oxygen from inhaled air diffuses into the blood while carbon dioxide diffuses from the blood into the air and is exhaled. Blood then circulates throughout the body, delivering oxygen and picking up carbon dioxide. Finally, the blood returns to the lungs to be oxygenated again.
Page D-13 - Knowing the amount of air that must be used does not solve the ventilation problem unless there is some way to determine the volume of air actually being used for ventilation. The standard procedure is to open the exhaust valve a given number of turns (or fraction of a turn), which...

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