Scuba Diving Underwater Navigation 3

Question 1

What is 'dead reckoning' in the context of underwater navigation?

Accepted Answer

Estimating position using known starting point, heading, speed, and time

Answer

Dead reckoning is estimating current position based on a known starting point combined with tracked heading, estimated speed (kick rate), and elapsed time.

Question 2

When planning a drift dive, where should the diver typically exit the water?

Accepted Answer

Downstream from the entry point, at a pre-planned exit

Answer

Drift dives are planned so the current carries divers to a designated downstream exit point where the boat or shore exit has been arranged in advance.

Question 3

What is the purpose of a dive flag when navigating back to a boat?

Accepted Answer

Mark the dive boat's position so divers can navigate toward it

Answer

A dive flag (or float with flag) marks the boat or entry point, giving divers a visible surface reference to navigate toward when ascending.

Question 4

What effect does low visibility have on underwater navigation?

Accepted Answer

Reduces reliance on visual landmarks, requiring greater use of compass and tactile cues

Answer

Poor visibility eliminates natural landmark references, making compass navigation, guideline use, and tactile reef-following far more critical.

Question 5

What is 'piloting' as a navigation technique in scuba diving?

Accepted Answer

Moving from one known landmark to the next in sequence

Answer

Piloting is a technique where divers navigate by identifying and moving between a series of known underwater landmarks rather than relying on instruments.

Scuba Diving Practice Test

Scuba Diving Practice Test

Scuba Diving Underwater Navigation 3