Horizontal direction expressed as angular distance from magnetic north. magnetic diurnal variation. Oscillations of the earth’s magnetic field which have a periodicity of about a day and which depend to a close approximation only on local time and geographic latitude. Also called MAGNETIC DAILY VARIATION.



Related Terms

MAGNETIC DIP

Angular distance between the horizontal and the direction of a line of force of the earth’s magnetic field at any point. Also called DIP, MAGNETIC INCLINATION.

TRUE DIRECTION

Horizontal direction expressed as angular distance from true north.

RELATIVE DIRECTION

Horizontal direction expressed as angular distance from heading.

GRID DIRECTION

Horizontal direction expressed as angular distance from grid north. Grid direction i

MERCATOR DIRECTION

Horizontal direction of a rhumb line, expressed as angular distance from a reference direction. Also called RHUMB DIRECTION.

COMPASS DIRECTION

Horizontal direction expressed as angular distance from compass north

GREAT CIRCLE DIRECTION

Horizontal direction of a great circle, expressed as angular distance from a reference direction.

GREATEST ELONGATION

The maximum angular distance of an inferior planet from the sun before it starts back toward conjunction, as observed from the earth. The direction of the body east or west of the sun is usually specified, as greatest elongation east (or west).

TERRESTRIAL LATITUDE

Latitude on the earth; angular distance from the equator, measured northward or southward through 90° and labeled N or S to indicate the direction of measurement.

RHUMB BEARING

The direction of a rhumb line through two terrestrial points, expressed angular distance from a reference direction. It is usually measured from 000° at the reference direction clockwise through 360°. Also called MERCATOR BEARING.

Related questions

MarineProHelp 2018 - 2019.