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THE HISTORY OF UNDERWATER ACTIVITY
The Mental Repertoire of a Skin Diver Knowledge
10 other sections not shown
33 feet air embolism air spaces air supply allow Appendix ascent atmosphere basic beach blood body bottom breath holding bubbles buddy buoyancy carbon dioxide carbon monoxide cause chest cold water compressed air creatures cylinder dangerous DECOMPRESSION SICKNESS decompression tables depth device diving area ear drum effects entry equipment eustachian tube exhalation Experienced divers explore Indifferent Fearful exposure face mask float foot fresh water gases hose Hyperventilation involved kelp kick legs lungs minutes mouth mouthpiece Navy night diving nitrogen normal nose oxygen pain partial pressure physical fitness pints reef regulator reserve valve respiration rip current rubber rv rv rv SCUBA diving shallow water blackout sharks shore signals sinuses skin and SCUBA skin diving snorkel spear spearguns squeeze suit surf surface swim fins swimmer symptoms tank temperature thermocline tion tissue tube underwater unit usually veteran divers waves weight belt