The NOAA Diving Manual: Diving for Science and TechnologyU.S. Department of Commerce, National Oceanic and Atmospheric Administration, Office of Marine Resources, 1975 - 368 pages |
From inside the book
Results 1-5 of 35
Page 2-17
... hazard . If , while diving , one tends to swallow air , it may be necessary to expel gas by belching or by passing gas per rectum , in the course of ascent . For the same reason , eating large amounts of gas pro- ducing foods prior to ...
... hazard . If , while diving , one tends to swallow air , it may be necessary to expel gas by belching or by passing gas per rectum , in the course of ascent . For the same reason , eating large amounts of gas pro- ducing foods prior to ...
Page 2-17
... hazard to the diver's safety . Most divers lose their effective- ness at about 200 feet , and at about 250 feet ... hazards can be minimized within certain limits . The sequence of events for the average man under the influence of high ...
... hazard to the diver's safety . Most divers lose their effective- ness at about 200 feet , and at about 250 feet ... hazards can be minimized within certain limits . The sequence of events for the average man under the influence of high ...
Page 4-18
... hazard rather than an asset . This is particularly true when diving in a strong current , or under conditions of ... hazards . The face mask is relatively simple in construction , consisting of a faceplate , body , retaining band , and ...
... hazard rather than an asset . This is particularly true when diving in a strong current , or under conditions of ... hazards . The face mask is relatively simple in construction , consisting of a faceplate , body , retaining band , and ...
Page 4-22
... hazards . If damaged it is quickly and easily repaired when the diver returns to the surface . The basic wet suit consists of neoprene pants and jacket , with boots . gloves , hood , and vest being optional ( Figure 4-22 ) . They are ...
... hazards . If damaged it is quickly and easily repaired when the diver returns to the surface . The basic wet suit consists of neoprene pants and jacket , with boots . gloves , hood , and vest being optional ( Figure 4-22 ) . They are ...
Page 4-36
... hazards as electric shocks , excessive noise , and the possibility of injury must be taken into account when selecting under- water tools . Table 4-2 lists some common tools used under- water , along with their source of power and avail ...
... hazards as electric shocks , excessive noise , and the possibility of injury must be taken into account when selecting under- water tools . Table 4-2 lists some common tools used under- water , along with their source of power and avail ...
Contents
1-1 | |
1-21 | |
2-17 | |
4-1 | |
4-6 | |
4-15 | |
51 | |
61 | |
11-9 | |
17-1 | |
13-1 | |
13-7 | |
14-4 | |
14-15 | |
15-1 | |
15-16 | |
7-1 | |
7-4 | |
8-1 | |
8-6 | |
8-8 | |
8-15 | |
8-33 | |
8-49 | |
10-1 | |
10-11 | |
5 | |
Other editions - View all
Common terms and phrases
Air Dives air supply ambient anesthetic ascent atmosphere blood boat body bottom breathing gas breathing medium buoyancy carbon dioxide cave diving closed-circuit compressed compressor cylinder decompression sickness decompression stops Decompression Table depth Dive Master diver diving equipment diving operations effects emergency entering the water equivalent air depth excursions exhaled exposure feet Figure fish gas embolism gases gauge habitat hazard hose hypoxia increase kelp limited lungs marine mask ment meter method minutes mixed gas mixture No-Decompression normal oxygen oxygen toxicity Paragraph partial pressure percent Photo pressure wave procedures recompression chamber reef regulator repetitive dive repetitive group Residual Nitrogen result safety sample saturation diving scuba Scuba Diving sharks species Standard Air stop submersible Surface Decompression surface interval surface support swim symptoms techniques temperature tion tissues treatment tube U.S. Navy umbilical underwater valve ventilation victim visibility volume weight wet suit
Popular passages
Page 13 - Archimedes stated that a body immersed in a fluid is buoyed up by a force equal to the weight of the displaced fluid.
Page 1-3 - 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 12 - Specific gravity is the ratio of the density of a substance to the density of water, the values for both substances being determined at the same temperature or at another specified temperature.
Page 17 - Dalton's law states that the total pressure exerted by a mixture of gases is the sum of the pressures that would be exerted by each of the gases if it alone were present and occupied the total volume.
Page 15-19 - Place the heel of one hand on the lower third of the breastbone, the other hand on top of the first. 2. Thrust downward from your shoulders with enough force to depress the breastbone l'/£-2 inches.
Page 7-12 - Fouling A surface-supplied diver's umbilical line may become fouled in mooring lines, wreckage, or underwater structures, or the diver may be trapped by the cave-in of a tunnel or shifting of heavy objects. The surface-supplied diver is in a much better situation to survive since he has a virtually unlimited air supply and generally the ability to communicate, thus facilitating rescue operations. Consequences of fouling may result in fatigue, exposure, and prolonged submergence, with subsequent prolonged...
Page 14-24 - 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...
Page 69 - Adjust buoyancy if necessary. Whether the diver is weighted neutral or negative will depend on the mission requirements. • Ensure that air supply system, helmet or mask, and communications are functioning properly. If not, corrections must be made prior to descent. Never dive with malfunctioning equipment. • The tender should also verify that all equipment is functioning satisfactorily. • The diver is given permission to descend by the Dive Master.
Page 1-19 - I, no psychophysiological per-formance degradation or any other consistent effect is noted. In zone II, small threshold hearing losses have been found, and there is a perceptible doubling in depth of respiration. In zone III, the zone of distracting discomfort, the symptoms are judgment errors, mental depression, headache, dizziness, nausea, "air hunger," and decrease in visual discrimination.
Page 14 - Time (feet) (minutes) 2. Descent rate- as fast as possible. 3. Ascent rate— 1 ft/min. Do not compensate for slower ascent rates. Compensate for faster ascent rates by halting the ascent. 4. Time at 165 feet- includes time from the surface. 5.