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

Depth gauge

Answer

Submersible pressure gauge (SPG)

Answer

Dive computer

Question 2

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

Accepted Answer

90 degrees

Answer

45 degrees

Answer

120 degrees

Answer

180 degrees

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

Hold the compass at eye level and flutter kick strongly

Answer

Tilt the compass toward the surface for easier reading

Answer

Refer to the compass only at the start and end of the swim

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

45 degrees

Answer

90 degrees

Answer

360 degrees

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

Bottom topography

Answer

Sand ripple patterns

Answer

Thermocline depth

Question 6

What does a diver use kick cycles to estimate during underwater navigation?

Accepted Answer

Distance traveled

Answer

Remaining air supply

Answer

Depth changes

Answer

Current speed