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magnetic compass click to hear : magnetic compass

Instrument for finding directions; it has a graduated compass card and a magnetic needle that points toward magnetic north.
magnetic compass image
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See magnetic compass in : french | spanish
base plate baseline scale pivot magnetic needle sighting line sight graduated dial compass card compass meridian line edge cover sighting mirror

base plate click to hear : base plate

Transparent surface that supports the compass card and has markings and scales.

baseline click to hear : baseline

Line marked on the base plate that is placed on top of a topographic map; it shows the direction of the place toward which the person wishes to travel.

scale click to hear : scale

Graduated line used to judge the distance to be traveled on a topographic map, in conjunction with the map’s scale.

pivot click to hear : pivot

Point around which the magnetic needle moves.

magnetic needle click to hear : magnetic needle

Pointer with a red magnetized part that points to Earth’s magnetic north pole.

sighting line click to hear : sighting line

Line running parallel to the baselines; it is used to indicate the direction of travel.

sight click to hear : sight

Device used to select a landmark in the direction a person chooses to walk.

graduated dial click to hear : graduated dial

Each of the equal intervals marked on the dial that indicate the angle in degrees of the points on the compass card.

compass card click to hear : compass card

Rotating device that is graduated in degrees and marked with the four cardinal points; it is used to indicate the direction of travel with respect to true north.

compass meridian line click to hear : compass meridian line

Line that, when matched with the meridian line on a map, can be used to determine the direction of travel in degrees.

edge click to hear : edge

Compass card marks where the needle’s red dot comes to rest when the compass is aligned with magnetic north.

cover click to hear : cover

Compartment that contains the mirror and protects the compass card when it is folded over the base plate.

sighting mirror click to hear : sighting mirror

Polished glass surface that reflects the image of the compass card and confirms the direction of travel.