PADI Underwater Navigation & Skills 3

Question 1

When conducting an underwater search using an expanding square pattern, what is the standard distance you move out on each successive leg?

Accepted Answer

One arm's length or visibility distance per side

Answer

Each successive side of an expanding square increases by one search-width increment (typically arm's length or visibility distance) to systematically cover the area.

Question 2

Which skill is considered most fundamental to all underwater navigation methods?

Accepted Answer

Maintaining neutral buoyancy and a horizontal body position

Answer

Neutral buoyancy and a horizontal trim reduce drag, conserve air, and allow accurate kick-cycle counting and compass use.

Question 3

You are navigating back to the boat using a reciprocal heading when you notice a 10-degree error in your outbound bearing. How will this affect your return?

Accepted Answer

You will surface 10 degrees off course from the boat

Answer

A 10-degree error on the outbound leg produces a corresponding 10-degree offset on the reciprocal, placing you off-target proportionally to distance traveled.

Question 4

What is the purpose of marking a descent line or anchor chain with a distinguishing tie or marker when beginning a navigation dive?

Accepted Answer

To identify your specific starting point so you can return to it

Answer

Marking the descent line gives you a unique reference point to aim for during your return navigation.

Question 5

While navigating a triangular pattern underwater, what interior angle must each turn be to close the triangle properly?

Accepted Answer

120 degrees (turning 60 degrees from your current heading)

Answer

An equilateral triangle has 60° interior angles, requiring you to turn 120° (the exterior supplement) at each corner to maintain the pattern.

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

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

PADI Underwater Navigation & Skills 3