USLA Flashcards
What size of a boat can you use the swimming towing technique?
Up to 30 FT and Larger
What waves are know as swells?
- Suface wave: a wave in the surface of the water; most often formed by wind, but may be formed by seismic activity or the gravitational pull of the moon and sun.
- Swell is a surface wave in the open water before it strikes a beach
When you see a dorsal fin what is it?
- Sharks have vertical tail fins. When swimming along the surface, the dorsal fin cuts through the water while the tail fin moves in back and forth motion.
- Sharks swim with their fins exposed longer that porpoises and dolphins.
- Porpoise and dolphins swim in arching motion exposing their curved dorsal in and out, but their tails are horizontal it doesn’t come out of the water.
Lightning how far is it when you see it and hear it, seconds per mile?
1 mile = 5 seconds
Buoy position vertical or horizontal?
Signals by lifeguard in shore if you lose the victim:
- Move right or left: buoy extended with the right or left arm.
- Move further out: buoy held vertically between two upraised arms.
- Stay there: arms extended horizontally to the sides without a buoy.
- Move offshore and wait: buoy held horizontally with both hands overhead. Normally done for boat or helicopter pickup of lifeguard and victim
What is the Oxygen Percentage delivered in mouth to mouth or mouth to mask?
approximately 16%
Oronasal mask: 16% - 50% or more
Non-Rebreather: 60% or more*
Demand Valve: 100%
BVM: 100%
Positive pressure ventilation: 100%
Breaking waves type and the definition?
- spilling wave: wave breaking gradually over a considerable distance also known as a slider. Crest of the wave spilling onto the wave face until the wave itself is engulfed by foam.
- plunging wave: also known as shorebreak. Formed when swell strikes a steep beach, reef or other obstacle and breaks with flying spray. Expanding its energy and tranforning it into a spilling wave for its remaining distance to shore. Wave that tends to curl over over and break with a crash, also known as crasher or breaker.
- surging wave: created where water is deep, they keep their rounded form until the crash agains the shoreline barrier.
When is the hurricane season in the Atlantic?
June 1 - November 30
Where and when lifeguarding began?
- China Chinkiang Association in 1708.
- Netherlands(society to rescue people from Drowning) 1767.
- USA Massachusetts Humane Society 1786.
Approaching a victim on the board toward the waves and what side?
Approaching the victim place nose of the board towards one side of the victim, placing the board between the victim and the rescuer.
First sign of drowning victim?
Facing the shoreline
Another name for torpedo buoys named after the designer?
Burnside buoy
Rescue tube advantages?
- Hydrodynamic
- Victim security
- Rescue Boat use
Rescue tube disadvantages?
- Multiple victims
- Victim avoidance
- Durability
Rescue buoy advantages?
- Multiple victims
- Victim avoidance
- Durability
