Spearfishing Basics of Spearfishing 5

Question 1

What is the recommended response if you feel the urge to breathe during a dive?

Accepted Answer

Ascend calmly and surface to breathe before pushing further

Answer

The urge to breathe signals it's time to ascend safely rather than risk blackout.

Question 2

What is shallow water blackout caused by?

Accepted Answer

Loss of consciousness from low oxygen, often near the surface on ascent

Answer

Falling oxygen during ascent can cause sudden blackout without warning.

Question 3

Why is hyperventilating before a dive dangerous?

Accepted Answer

It lowers CO2 and can delay the urge to breathe until blackout

Answer

Hyperventilation suppresses the CO2 breathing trigger, risking blackout without warning.

Question 4

What is the 'one-up, one-down' buddy system?

Accepted Answer

One diver dives while the other watches from the surface

Answer

One diver rests and observes on the surface while the partner dives, ready to rescue.

Question 5

How should a speargun be carried when other divers are nearby?

Accepted Answer

Pointed away from people with the safety engaged

Answer

Muzzle discipline and the safety prevent accidental discharge into people.

Spearfishing Practice Test