Magnetic Compass

Question 1

What are the various compass errors?

Answer 1

Oscillation error
Deviation error
Variation error
Dip errors

Question 1

You are accelerating while flying in an easterly direction. What compass error will you experience?

Answer 1

A turn toward the north. Remember ANDS = Accelerate North Decelerate South

Question 2

You are turning from a northerly direction. What compass error will you experience?

Answer 2

The compass lags in turns from a northerly heading. Remember: UNOS = Undershoot North Overshoot South

Question 3

What are magnetic dip errors?

Answer 3

a. Acceleration error—On east or west headings, while accelerating, the magnetic compass shows a turn to the north, and when decelerating, it shows a turn to the south. Remember: ANDS = Accelerate North Decelerate South
b. Northern hemisphere turning error—The compass leads in the south half of a turn, and lags in the north half of a turn. Remember: UNOS = Undershoot North Overshoot South