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226 Divers Alert Network ............................................ 139, 170 Divers down flag ............................................................ 44 Diving equipment checklist ........................................ 213 Diving skins ................................................................... 38 Diving suits Choosing based on conditions ................................. 41 Donning.................................................................... 59 Dry suits .................................................................... 39 Hoods ........................................................................ 42 Maintenance ............................................................. 40 Purpose ..................................................................... 37 Skins ........................................................................ .38 Wetsuits ..................................................................... 38 Diving your plan .......................................................... 154 Dizziness ...................................................................... 163 Dolphin kick .................................................................. 52 Drag................................................................................ 97 Drift diving ........................................................... 183, 192 Drugs and alcohol, use of and scuba diving ............................................................. 10 Dry suits Buoyancy control ..................................................... 40 Choosing based on conditions ................................. 41 Features .................................................................... 40 Maintenance ............................................................. 40 Operation .................................................................. 40 Specialty training ..................................................... 39 Squeezes.................................................................. 107 Types ......................................................................... 40 Dump valve, buoyancy compensator ...................... 33, 75 Dust cap .......................................................30, 55, 56, 89 E Ear .............................................................. See Middle ear Electronic depth gauges ................................................ 28 Embolism, air .............................................................. 113 Emergencies and first aid ............................................ 169 Emergency ascents Buoyant .................................................................... 79 Dependent ................................................................. 77 General guidelines ................................................... 80 Independent.............................................................. 79 Swimming ................................................................ 79 Emergency plans ......................................................... 153 Emphysema, mediastinal ............................................ 113 End-Of-Dive Letter Group table .................................. 130 Enriched air ........................................................... 95, 118 Entanglements ............................................................. 162 Entries and exits Back roll entry .......................................................... 63 Beach Calm water entries ................................................ 64 Calm water exits ................................................... 66 Rock entries ........................................................... 64 Rock exits .............................................................. 66 Surf entries ............................................................ 64 Surf exits ............................................................... 66 Boat and platform entries ........................................ 62 Boat and platform exits ........................................... 65 Giant stride entry ...................................................... 62 How the site affects ................................................. 178 Ladder exits .............................................................. 65 Seated side entry ....................................................... 63 Shoreline conditions .............................................. 178 Swim platform exits ................................................. 65 Environment Boat diving ............................................................. 183 Bottom conditions .................................................. 178 Cleaning up ............................................................ 190 Collecting................................................................ 190 Conservation of ...................................................... 187 Currents .................................................................. 183 Diving techniques .......................................... 176, 179 Hunting .................................................................. 189 Marine life .............................................................. 185 Moving water .......................................................... 182 Negative diver impacts ........................................... 188 Physical characteristics .......................................... 176 Positive diver impacts ............................................ 188 Shore conditions .................................................... 178 Surf ......................................................................... 182 Thermocline ........................................................... 181 Tides........................................................................ 183 NAUI Scuba Diver INDEX


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