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