Compass Errors

Question 1

Deviation

Answer 1

Magnetic influences within an aircraft such as electrical circuts, radio, lights, tools, engine and magnetized metal parts that cause the compass needle to be deflected frequently

Question 2

Variation

Answer 2

Angle between true north and magnetic north

Question 3

Magnetic Dip

Answer 3

Magnetic dip- compass pointer dips when close to north and south poles

Question 4

Oscillations

Answer 4

combination of all the other errors causing the compass to swing back and forth

Question 5

Northern turning errors

Answer 5

UNOS- Undershoot north, Overshoot south

Compass speeds up when turning to north heading and lags when turning to a south heading

Question 6

Acceleration errors

Answer 6

ANDS- Acellerate North Decellerate South

ONLY on EAST and WEST headings
in the Northern Hemisphere, when an aircraft accelerates the compass will begin to show a turn to the north, and as the aircraft decelerates the compass will show a turn to the south. In the Southern Hemisphere, the opposite effect will take place.