PADI Night & Limited Visibility Diving 3

Question 1

Which aquatic behavior is MOST commonly observed by night divers that is rarely seen during the day?

Accepted Answer

Coral spawning and invertebrate feeding activity

Answer

Many invertebrates — such as octopuses, lobsters, and corals — become active at night for feeding, making nocturnal dives rich with unique behavior.

Question 2

A diver enters the water at night and cannot see the bottom. What is the safest descent method?

Accepted Answer

Descend along a reference line while equalizing frequently

Answer

Using a descent line provides orientation, rate control, and a physical reference that compensates for the lack of visual depth cues.

Question 3

What condition is a night diver MOST at risk of experiencing due to the absence of natural light?

Accepted Answer

Loss of spatial orientation and vertigo

Answer

Without visual reference points, divers can lose their sense of up and down, leading to disorientation — a major night-diving hazard.

Question 4

In limited visibility, a diver's torch illuminates a cloud of particles and they cannot see their buddy. What is the correct immediate action?

Accepted Answer

Stop, signal with light, and listen for buddy's bubbles

Answer

PADI's lost-buddy procedure starts with stopping, looking, and listening — using light signals and listening for exhaust bubbles to relocate the buddy.

Question 5

Why is it important to allow time for night vision (dark adaptation) before a night dive?

Accepted Answer

It improves peripheral vision at the surface so hazards are spotted

Answer

Dark-adapted eyes can detect dim lights and movement at the surface, helping divers spot boat traffic, entry points, and their exit safely.

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

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

PADI Night & Limited Visibility Diving 3