232 Fitness ......................................................................... 9 Health ......................................................................... 9 Misconceptions ........................................................... 8 Risks............................................................................ 7 Use of drugs and alcohol ......................................... 10 Your obligations ......................................................... 9 Scuba tanks ...................................................See Cylinders Sea urchin .................................................................... 171 SEABAG BAG steps .................................................................. 61 Checklist ................................................................. 212 SEA steps ................................................................. 153 Seasickness ................................................................... 164 Seated side entry ............................................................ 63 Senses, effects of diving on .................................... 95, 163 Shallow breathing ....................................................... 115 Shallow water blackout ................................................. 54 Sharing air Buddy breathing method ......................................... 77 Octopus method ....................................................... 77 Shark attack, threat of ............................................. 8, 185 Shipwrecks, conservation of ........................................ 190 Shivering, heat loss and ................................................ 96 Shoreline conditions.................................................... 178 Shorty wetsuits ............................................................... 39 Shot pouches .................................................................. 36 Single dive, time limits for .......................................... 125 Sinuses Anatomy.................................................................. 110 Block ....................................................................... 110 Medication .............................................................. 111 Squeezes.................................................................. 110 Site orientation ............................................................ 178 Site survey .................................................................... 153 Six-pack plastic rings, cutting open ........................... 190 Skills Assembling scuba unit ............................................. 55 Assembling weight belt ............................................ 58 Back roll entry .......................................................... 63 Beach Entries ................................................................... 64 Exits ....................................................................... 66 Blast clearing Regulator............................................................... 69 Snorkel .................................................................. 54 Boat and platform Entries ................................................................... 62 Exits ....................................................................... 65 Buddy system ............................................................ 80 Buoyancy .................................................................. 73 Checking equipment ................................................ 61 Communication ....................................................... 82 Disassembling scuba unit ........................................ 89 Displacement clearing of snorkel ............................ 54 Donning Gear ....................................................................... 49 Scuba unit ............................................................. 59 Weight belt ............................................................ 60 Donning diving suits ................................................ 59 Emergency ascents ................................................... 79 Entering and exiting the water ................................ 61 Giant stride entry ...................................................... 62 Handling scuba unit in the water ........................... 85 Ladder exits .............................................................. 65 Mask Clearing ................................................................. 67 Removing and replacing ...................................... 68 Monitoring air supply ...................................... 72, 106 Navigation ................................................................ 87 Orally inflating BC ................................................... 71 Purge clearing of regulator ..................................... 69 Regulator recovery ................................................... 69 Removing and replacing weight belt in water .......................................................... 86 Safety ........................................................................ 77 Seated side entry ....................................................... 63 Sharing air ............................................................... 77 Snorkeling ................................................................ 48 Surface dives ............................................................. 52 Swim platform exits ................................................. 65 Switching from regulator to snorkel ....................... 71 Testing scuba unit .................................................... 57 Using fins .................................................................. 50 Skin diving ................................................................. 5, 53 NAUI Scuba Diver INDEX
19116TC
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