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Flashcards in Waves And Rips Deck (22)
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1
Q

What is a rip current?

A

A rip current is a body of water moving out to sea. People drown because they resist too much

2
Q

Common signs of a rip are

A

Discoloured brown water due to sand stired up, foam on the surface extending beyond the break, debris floating seaward

3
Q

Types of waves

A
Plunging (dumping) waves
Spilling wave (safest) waves
Surging wave (most dangerous)
4
Q

3 factors that determine the size of waves

A

Intensity of the wind, length of time the wind blows, distance the wind blows

5
Q

How to escape from a rip current

A

If you are a strong swimmer, swim at a 45 degree angle away from the rip but if a weak swimmer, wait till the rip stops and swim 30 meters away from the rip

6
Q

DRSABCD

A
Danger- ensure area is safe
Response (cows)
Send for help- 000
Airway-open mouth
Breathing- check for breathing 
Cpr- 30 compressions 
Defib
7
Q

Beach warning signs

A

Warning signs use a yellow background and include simple symbols

8
Q

What are regulatory signs

A

They are more important than warning signs because they inform prohibited activites at the beach

9
Q

What are information signs

A

They are there to provide info at the beach

10
Q

What are safety signs

A

Used to indicate safety provisons

11
Q

Ways to equalize

A

hold your nose and swallowing or holding nose and blowing out

12
Q

Plunging wave

A

A plunging wave occurs when the ocean floor is steep or has sudden depth changes,

13
Q

Spilling waves

A

These аrе produced bу а gently sloping sea floor, which causes thе wave tо peak gradually

14
Q

Surging waves

A

type оf wave comes іn out оf relatively deep water onto steep beaches, аnd rather thаn break it will surge up thе beach.

15
Q

Why do waves break?

A

Waves break when the shape of the wave becomes too steep and this usually happens as waves travel from deep water to shallow water

16
Q

Parts of the wave

A

Back of the wave= crest
Top= lip
Middle part=face
Bottom= trough

17
Q

What is a littoral current?

A

A littoral current that forms into the basic rip and moves parralel to the shore and is at the base of a rip

18
Q

Aided rescues

A

There are two rescue techniques. one technique is the tube rescue and other is the lifeboard rescue

19
Q

Spring and neap tides

A

Spring tides are strong , full tides whereas neap tides are weaker

20
Q

Tides

A

Tides occur from the gravity from the moon and there are low tides then high tides every 4 hours

21
Q

Tide chart

A

High and low tide every 4 hours
Time= 1450= 2:50pm
Ht = height

22
Q

Flag signs

A

One hand up- return to shore
Two hand ups- Procede further out to sea
Two hands into wingspan- Remain stationary
Close fist shaking hand- assistance required