PADI Underwater Navigation and Buoyancy Control

Question 1

Which instrument is the primary tool used for underwater navigation without natural references?

Accepted Answer

Underwater compass

Answer

An underwater compass is the primary instrument for navigating when natural references such as sunlight, bottom contour, or surge are unavailable.

Question 2

When swimming a square search pattern underwater, a diver turns how many degrees at each corner?

Accepted Answer

90 degrees

Answer

A square search pattern requires 90-degree turns at each corner to maintain a systematic grid over the search area.

Question 3

What is the recommended technique for maintaining a straight compass bearing while swimming underwater?

Accepted Answer

Keep the compass level, align the lubber line with the direction of travel, and hold it steady

Answer

Divers should keep the compass level, align the lubber line with the direction of travel, and hold it steady to maintain an accurate bearing.

Question 4

To return to the starting point on a reciprocal compass course, a diver should add or subtract how many degrees from the original heading?

Accepted Answer

180 degrees

Answer

A reciprocal bearing is calculated by adding or subtracting 180 degrees from the original heading to reverse direction.

Question 5

Which natural navigation reference uses the position of the sun and wave surge patterns to determine direction?

Accepted Answer

Sun angle and surge direction

Answer

Sun angle and wave surge direction are reliable natural references, as surge typically moves parallel to shore and the sun travels predictably across the sky.

PADI - Professional Association of Diving Instructors Practice Test

PADI - Professional Association of Diving Instructors Practice Test

PADI Underwater Navigation and Buoyancy Control