1.Map: Graphic representation of a portion of the earths surface drawn to scale. Uses colors, symbols, and labels to represent features on the ground
2.Marginal information on a map: - Sheet name
-sheet number
-series name
-series number
-edition number
-map scale
-Adjoining sheets diagram
-elevation guide
-bar scales
-contour interval note
-declination diagram
-legend
3.Declination Diagram: indicates the angular relationships of true north, grid north, and magnetic north.
4.GM Angle: the difference in a grid azimuth and the magnetic azimuth for a certain area. (use LARS rule)
5.GM Conversion: Applying angular difference between the grid north and mag- netic north to convert compass readings to grid version for use in navigation
6.Lensatic Compass components: Cover Base
Lens
7.Compass Dial: part of the compass is delicately balanced and free floating when in use. It can be locked in place by closing the eyepiece and also contains two complete circular scales, one in degrees and one in mils.
8.Bezel Ring: part of the compass holds the upper glass crystal in place and contains 120 clicks when rotated fully; each click equals 3 degrees.
9.Cover: Cover containing sighting wire
10.Thumb Loop: This serves as a retaining device to secure the compass in the closed position. It is also used as a wire loop for your thumb when you hold the compass in position for sighting in on objects.
11.Black Index Line: Stationary line used as a reference line for determining direction
When the compass is held properly the azimuth found directly under the black index line identifies the direction that the compass is pointing
12.Sighting Wire: The sighting wire and its use are similar to the front sight of a weapon.