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6CHAPTER 5CHAPTER VIII NAUI Master Scuba Diver Table of Contents Chilling ..............................................................128 Overheating .......................................................131 Effects of Each ..................................................132 Sea Sickness ......................................................133 Disorientation ...................................................134 Vertigo ...............................................................135 Dehydration.......................................................135 Things That Go Bump ......................................136 Gender ..................................................................137 Fitness for Scuba Diving......................................139 Health and Medical Considerations .................139 Cardiovascular Disease .....................................139 Lung Disorders .................................................140 Nervous System Disorders ................................141 Diabetes .............................................................141 Ear and Sinus Disorders ..................................141 Smoking, Drugs, and Alcohol ..........................141 Nutrition ...............................................................142 Physical Fitness ....................................................142 Aerobic Fitness ..................................................143 Muscular Strength ............................................144 Muscular Endurance ........................................144 Flexibility ...........................................................144 Conclusion ............................................................145 Definition of Terms ..............................................145 For Further Reading ............................................148 Decompression and Recompression 150 Learning Goals .....................................................152 Decompression Theories .....................................152 The Haldane Theory .........................................152 U.S. Theory ........................................................153 British Theory ...................................................155 Swiss Theory .....................................................156 Canadian Theory ..............................................157 Dive Tables ...........................................................157 Sample Dive Table Problems ...........................159 Special Dive Table Procedures ...........................159 Cold or Strenuous Dives ...................................159 Ascent Rate Variations ......................................159 Surface Interval Less Than Ten Minutes ........160 Multi-level Diving .............................................160 Omitted Decompression ...................................160 Additional Dive Table Problems ......................160 Flying After Diving ...........................................161 Dive Computer Theory and Application ..........162 AAUS Dive Computer Guidelines .....................162 Nitrox Diving .....................................................162 Aids to Decompression .....................................163 Hyperbaric Chambers ..........................................163 Hy perbaric Chambers and the Recreational Diver .......................................163 Ge neral Characteristics of Hyperbaric Chambers ...................................164 Compressors and Gas Sources .........................165 Chamber Types and Their Uses .......................165 Monoplace Single Lock ....................................165 Multiplace Double Lock ...................................166 Chamber Operations and Safety Concerns ......166 Operations Personnel .......................................166 Operational Procedures ...................................168 Specific Safety Concerns ...................................168 Chamber Operators and Physicians Need.......169 A Chamber Experience .....................................170 Altitude Diving .....................................................170 Differences at Higher Altitudes ........................170 Procedures for Altitude Diving ........................171 Summary ..............................................................175 For Further Reading ............................................176 Rescue and Emergency Procedures 178 Learning Goals .....................................................180 Emergency Ascents ..............................................180 Independent Ascents .........................................180 Redundant System Ascent ................................180 Emergency Swimming Ascent .........................181 Buoyancy Compensator Breathing ..................181 Buoyant Ascent .................................................182 Dependent Ascents ............................................182 Shared Air Ascent: Alternate Air Source .........182 Shared Air Ascent: Buddy Breathing...............183 Di sease Risks Associated with Sharing Mouthpieces ...........................184 Refresher Training...............................................184


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