The direction of the track relative to magnetic north.



Related Terms

GRID TRACK

The direction of the track relative to grid north

NORTH

The primary reference direction relative to the earth; the direction indicated by 000° in any system other than relative. True north is the direction of the north geographical pole; magnetic north the direction north as determined by the earth’s magnetic compass; grid north an arbitrary reference direction used with grid navigation.

COMPASS TRACK

The direction of the track relative to compass north

MAGNETIC RANGE

A range oriented in a given magnetic direction and used to assist in the determination of the deviation of a magnetic compass.

MAGNETIC LINES OF FORCE

Closed lines indicating by their direction the direction of magnetic influence.

MAGNETIC AMPLITUDE

Amplitude relative to magnetic east or west.

FLUX GATE

A detector that gives an electric signal whose magnitude and phase are proportional to the magnitude and direction of the external magnetic field acting along its axis; used to indicate the direction of the terrestrial magnetic field.

VIBRATING NEEDLE

A magnetic needle used in compass adjustment to find the relative intensity of the horizontal components of the earth’s magnetic field and the magnetic field at the compass location. Also called HORIZONTAL FORCE INSTRUMENT.

LINE OF FORCE

A line indicating the direction in which a force acts, as in a magnetic field

ELECTROMAGNETIC WAVES

Waves of associated electric and magnetic fields characterized by variations of the fields. The electric and magnetic fields are at right angles to each other and to the direction of propagation. The waves are propagated at the speed of light and are known as radio (Hertzian) waves, infrared rays, light, ultraviolet rays, X-rays, etc., depending on their frequencies.

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