287 INDEX INDEX S SAC rate .........................see Surface Air Consumption rate Safety, light salvage and .................................................225 Safety stop, deep diving and.......................... 233, 240, 245 Sailboats, collision avoidance and .................................266 Salt tablets, hyperthermia and .......................................133 Saurine poisoning .............................................................53 Saxitoxins ..........................................................................52 Scombroid poisoning ........................................................53 Scope, anchoring and .....................................................268 Scorpionfish ......................................................................54 SCUBA .................................see Self-Contained Underwater Breathing Apparatus Scuba cylinders ............................................... see Cylinders Scyphozoans ......................................................................54 Sea anemones....................................................................54 Sea cucumbers ..................................................................56 Sea sickness .....................................................................133 Sea snakes .........................................................................57 Sea urchins ........................................................................56 Seamanship and boating ............................ see Boating and seamanship Search circular .......................................................................222 compass-controlled patterns of ........................221, 222 contour .......................................................................221 defining search area in .............................................218 expanding box pattern of ..........................................222 jackstay pattern of .....................................................224 laws and regulations and..........................................220 organization of ..........................................................218 parallel pattern of ......................................................221 patterns of ..........................................................220-224 personnel in ...............................................................218 procedures for ...........................................................220 risk factors in .............................................................219 risk-benefit assessment in ........................................219 running jackstay pattern of ......................................224 semicircular pattern of .............................................223 straight-line patterns of ............................................223 in waters with current ...............................................219 Seastars ........................................................................50, 56 Seaweeds ............................................................................50 Secondary drowning .......................................................117 Second-stage valves ..........................................................12 Seiches ...............................................................................42 Seismic waves ....................................................................36 Self-Contained Underwater Breathing Apparatus (SCUBA) .....................................4 Self-discipline, deep diving and ....................................235 Semicircular ear canals, disorientation and vertigo and .................................134 Semicircular search pattern ...........................................223 Semiclosed-circuit scuba ...................................................4 Semi-diurnal tides ......................................................40, 41 Shallow water, waves in .............................................36, 37 Shallow water blackout, respiration and ......................113 Sharks ............................................................. 50, 58, 60, 63 Sheepshank knot .............................................................270 Sheet bend ...............................................................225, 270 Shell collecting, conservation and ...................................62 Shellfish .............................................................................63 Ship handling, basic .......................................................263 Side force, basic ship handling and ..............................264 Signal lights restricted visibility and ..............................................266 right of way and ........................................................265 Silent bubbles, decompression sickness and .................157 Silt 206, 207, 210, 215, 220 Single-hose regulators .....................................................11 Sinus and ear disorders ..................................................141 Sinus barotrauma ...................................................127, 128 Sinus block ......................................................................127 Sinus squeeze ..................................................................127 SIT ...............................................see Surface Interval Time Skiffs, open, boat diving and ..................................258-261 Skin bends .......................................................................118 Skip breathing .........................................................112, 147 Slack water ........................................................................42 Slingshot valve ................................................................238 Smoking, cigarette ......................................... 115, 118, 141 Snakes ..........................................................................57-59
20047TC
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