test 1, pp 3: magnetic compass

What is it called when an airplanes speed affects the magnetic compass?

Acceleration and decceralation errors

Magnetic north pole

An area pointed to by a compass based on the Earth's magnetism. This location will change over time.

How do you calculate compass headings?

Converting from degrees true to degrees magnetic using variation and to our compass heading, using deviation.

True heading of 136 to a compass heading when the variation is 19 degrees west and the deviation is 3 degrees east

Magnetic heading of 155 degrees, and compass heading of 152 degrees

Variation

The angular difference between true north and magnetic north from any given position on the earth's surface

True north

The direction to the geographic North Pole

Isogonic line

The line connecting points at which there is no variation between true and magnetic north

Deviation

The metal in the airplane (and the radios and other equipment) affect the compass so that it doesn't correctly point north

Northerly Turning Error

When turning away from the magnetic North Pole, the compass lags. When turning towards the magnetic North Pole, the compass leads

The actual value of the variation angle is marked by a _______ on the chart

dashed magenta line

The magnetic compass is used to _____

determine magnetic heading

East is _____

least (-)

isogonic lines

marked by broken magenta lines which connect points of equal magnetic variation

Magnetic north

the direction that the needle of a magnetic compass points

West is best, and east is least is only used from ______ to _____

true to magnetic

Compass heading to true heading

west is least, east is best

Acceleration error (magnetic compass)

will cause the compass to briefly show a turn north.

The deviation is written on a ____

compass correction card, which the pilot takes into account while planning flights

Deceralation error (magnetic compass)

Will cause the compass to show a turn south

West is _____

best (+)