COMPASS

• is an instrument used for navigation and orientation that shows direction relative to the geographic of

Cardinal directions, or "points"

• shows the directions north, south, east, and west as abbreviated initials marked on the compass. When the compass is used

 • a diagram called a compass rose, 

Magnetic Compass• The magnetic compass is the most familiar compass type.

• The magnetic compass was first invented as a device for divination as early as the Chinese Han Dynasty (since about 206 BC), and later adopted for navigation by the Song Dynasty Chinese during the 11th century. The use of a compass is recorded in Western Europe and in Persia around the early 13th century.

How Compass works

A compass points north because all magnets have two poles , a north pole and a south pole, and the north pole of one magnet is attracted to the south pole of another magnet.

The Earth is a magnet that can interact with other magnets in this way, so the north end of a compass magnet is drawn to align with the Earth's magnetic field. Because the Earth's magnetic North Pole attracts the "north" ends of other magnets, it is technically the "South Pole" of our planet's magnetic field.

Magnetic Declination

Magnetic declination or variation is the angle on the horizontal plane between magnetic north (the direction the north end of a compass needle points, corresponding to the direction of the Earth's magnetic field lines) and true north (the direction along a meridian towards the geographic North Pole)

Locating Places

Finding Location