BSAC SPORTS DIVER THEORY

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BSAC SPORTS DIVER THEORY

ACTUAL EXAM WITH CORRECT SOLUTIONS.

When can a sports diver dive with an ocean diver or another sports diver? - correct answer- In conditions already encountered by the ocean diver during their training and under the supervision of a dive manager.

What's the initial limited depth for a sports diver? - correct answer- 20m

What's the progressively extended depth of a sports diver? - correct answer- 35m

Is a neap tide small or large? - correct answer- Small

Is a spring tide small or large? - correct answer- Large

What causes a neap tide? - correct answer- When the Moon is at a right angle to Earth and the Sun, creating the least amount of gravitational pull in one direction, creating weak tides. 1 / 4

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What causes spring tides? - correct answer- The gravity of the sun and moon pull in the same direction, creating strong tides.

Neap tides coincide with what? - correct answer- The quarters of the moon

Spring tides coincide with what? - correct answer- New and full moon

What's the average tide cycle in most places? - correct answer- 12 hours

How many tide cycles in a day? - correct answer- 2

How many high tides in a day? - correct answer- 2

How many low tides are there in a day? - correct answer- 2

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How many times do spring tides occur in a lunar month? - correct answer- 2

How many times do neap tides occur in a lunar month? - correct answer- 2

What's the tidal range? - correct answer- High water - low water

What's slack water? - correct answer- At the tides turning point, when the water speed is at its slowest.

What can make diving on a static site (e.g. a wreck) safer? - correct answer- Diving in slack water

What is ground swell? - correct answer- When wind causing wave action on the surface can be felt on the sea bed.

When is ground swell the roughest? - correct answer- When the surface winds go against the tide/stream/current flow.

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Is an incoming or outgoing tide better for visibility? - correct answer- Incoming

What are five factors that can affect visibility? - correct answer-

• bad weather
• tides
• being close to river estuaries
• lots of phytoplankton + zooplankton (most likely to be a

problem in spring in most places.) -disturbance by divers.

What's a thermocline? - correct answer- Sudden change in temperature, may look oily/ shiny and produce a change in visibility

What can you do to reduce the effect of glare on the surface (as a boat crew member, not a diver?) - correct answer- - wear polarised sunglasses

• position the boat with the sun behind you

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