By Dennis K. Graver
The best-selling authoritative source returns up-to-date and higher than ever.
Scuba Diving, 5th Edition, is the main updated source for experiencing safe, gratifying dives. filled with full-color photos and special diving guide, this can be the suitable spouse for leisure divers, diving teachers, and scholars.
Veteran teacher Dennis Graver stocks the most recent examine, technology, and suggestions in addition to approximately forty years of diving adventure. He demystifies advanced issues comparable to fuel legislation and the physics and body structure of scuba. You’ll additionally study those abilities:
• Equalize strain within the sinuses, ears, and masks.
• persist with boat diving and blood brother cost approaches.
• grasp the nuances of dive making plans and decompression in order that each dive is secure and stress-free.
• pick out, use, and preserve scuba apparatus.
• properly benefit from the underwater setting, together with aquatic natural world.
• hinder or deal with underwater emergencies and dangers.
during this re-creation you’ll locate program of information (AOK) questions and solutions. For the 1st time, you’ll be capable to practice the data and directions to real-world scuba difficulties, making you larger ready for these unforeseen occasions it's possible you'll come upon.
even if you're a starting or intermediate diver or diving teacher, ensure you have the entire bases lined sooner than you cross underwater. Scuba Diving will be certain a secure, profitable, and lucrative dive whenever you're taking the plunge.
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Extra info for Scuba diving
Hands quickly lose their warmth to the water. If you dive without hand protection in cold water, you lose body heat through your hands. Because your hands may become numb and lack strength when they get cold, you should insulate them to keep them functioning and to conserve body heat. 39 40 Scuba Diving Small people chill more quickly in water than large people do. Small people have less muscle mass to generate and store heat. Insulation is important for all divers, but protection against heat loss is more critical for those of smaller stature.
Drag Drag is a force that slows movement. Resistance to movement is much greater in water than in air. Factors affecting drag include the viscosity of the fluid, the speed of motion, and the size and shape of the object moving through the fluid. 9 in chapter 3). Because of water’s higher density, the molecules of water are much closer together than those of air. 1). Light travels about 27 percent slower in water than in air. Sound travels about 4 times faster in water than in air. 4 to 64 lb/ft (1,000 kg/m3) Water is 800 times denser than air.
The density of the air is twice as great as it was originally. When you return the compressed air space to its original pressure, the air inside expands until the object reaches its original volume. You compress your lungs during a breath-hold descent, and they return to normal volume when you return to the surface, provided that you do not expel air underwater. Scuba equipment provides air to you at the exact pressure of the surrounding water. This allows you to expand your lungs to their normal volume regardless of the depth.