Amplitude relative to magnetic east or west.



Related Terms

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.

MAGNETIC AZIMUTH

Azimuth relative to magnetic north.

ELECTROMAGNETIC INDUCTION

The production of electromotive force (EMF) in a conductor through relative motion of a conductor and a magnetic field, or by the change in the strength of magnetic flux around the conductor.

COMPASS AMPLITUDE

Amplitude relative to compass east or west.

FRETTING

Wear phenomena taking place between two surfaces having oscillatory relative motion of small amplitude.

TRUE AMPLITUDE

Amplitude relative to true east or west.

MAGNETIC HEADING

Heading relative to magnetic north; compass heading corrected for deviation.

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.

MAGNETIC COURSE

Course relative to magnetic north; compass course corrected for deviation. magnetic daily variation.

GRID AMPLITUDE

Amplitude relative to grid east or west

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