TC 3-25.26 Map Reading and Land Navigation

what army doctrine covers land navigation

TC 3-25.26

what is a map

a graphic representation of a portion of the earths surface drawn to scale as seen from above

what must be done with a map before it can be used

it must be oriented

what are the basic colors of a map and what does each color represent?

Black - man made features buildings roads

Red Brown - cultural features, all relief features, non surveyed spot elevations and elevations such as contour lines

Blue- bodies of water

Green - vegetation

Red - Classifies cultural features such as populated areas, main roads, and boundaries

Brown - all relief features and elevation such as contour lines

Other - occasionally other colors may be used to show specific information.

What are military symbols

figures used to represent types of military organizations, installations, and activities.

where is the legend of the map found

lower left margin

what are contour lines

imaginary lines on the map that represent high and low ground elevation

what are 3 types of contour lines

index, supplementary, intermediate.

how many norths are there on a military map

true north, magnetic north, grid north.

what is the general rule for reading and plotting military grid coordinates

move right and up

how close will a six digit coordinate get you to your point?

100 meters

what are the 4 quadrants on a military map

northwest, northeast, south east, southwest.

what are the 5 major terrain features

hill, ridge, valley, saddle, depression.

what are the 3 minor terrain features on a map

draw, spur, cliff

what are the 2 supplementary features found on a map

cut and fill

what is an azimuth

a horizontal angle measured in a clockwise manner from north base line, expressing direction

what is vertical distance

the distance between the highest and lowest points measured

which north is used when using a military map

grid north

how would you hold a lenstatic compass

away from metal, level, and firm

name 2 ways to hold a compass

compass to cheek method and center hold method.

are topographic symbols drawn to scale

no

what do topographic symbols represent

man made and natural features

what is a back azimuth

the opposite direction of a azimuth

how do you figure out a back azimuth

if azimuth is 180 or less add 180 degrees, if its 180 or more subtract 180 degrees.

what does UTM stand for

Universal Transverse Mercator

Name 2 ways to orient a map

use a compass, and terrain association.