Magnetic Compass - QT
Updated: Apr 26, 2021
Lesson Quicktakes cover the items that should be memorized from each of the wifiCFI Lessons. They do not cover all of the lesson details in-depth.
COMPASS ERRORS (VDMONA):
V = Variation.
D = Deviation.
M = Magnetic Dip.
O = Oscillation.
N = Northerly Turning Errors.
A = Acceleration Errors.
VARIATION:
The angular difference between True and Magnetic North.
DEVIATION:
Caused by the Electro-Magnetic Fields of the aircraft.
Corrected with a Compass Deviation Card.
MAGNETIC DIP:
The further a compass travels North or South the more it dips toward the North or South Pole.
OSCILLATION:
Turbulence causes the compass to bounce around in its housing of fluid.
NORTHERLY TURNING ERRORS (UNOS):
Undershoot
North
Overshoot
South
ACCELERATIONS ERRORS (ANDS):
Accelerate
North
Decelerate
South