Magnetic Compass - QT

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

where aviation comes to study

worldwide site members: 27,532