PADI Night & Limited Visibility Diving 2

Question 1

When conducting a night dive, what is the recommended primary light color for the marker light clipped to your tank valve or BCD?

Accepted Answer

White

Answer

A white marker light on your tank or BCD helps your buddy and dive leader keep track of your position in the water column.

Question 2

Which underwater navigation technique is most reliable during a night dive with zero ambient light?

Accepted Answer

Compass and kick-count

Answer

Compass bearings combined with kick-cycle counting provide a consistent, light-independent way to track distance and direction.

Question 3

A diver notices bioluminescent organisms glowing in the water during a night dive. What should the diver do to best observe this phenomenon?

Accepted Answer

Turn off lights and wave a hand gently through the water

Answer

Bioluminescence is best seen by extinguishing artificial lights so the faint natural glow becomes visible when water is disturbed.

Question 4

What is the PADI recommendation for the minimum number of lights a night diver should carry?

Accepted Answer

One primary and one backup light

Answer

PADI requires at least one primary light and one backup light so the diver can continue the dive safely if the primary fails.

Question 5

During limited visibility conditions caused by a silt-out, a diver should first:

Accepted Answer

Stop, remain still, and allow particles to settle

Answer

Stopping and hovering neutrally buoyant allows fine particles to settle enough to regain some visibility before making a calm exit.

(PADI) Certified Professional Association of Diving Instructors Diver Practice Test