TC 3-25.26 Flashcards
What are the three types of north?
Grid, magnetic, true North.
What are the three most common scales of maps used in today’s army?
Small (1 – 1,000,000 and smaller),
medium (1–1,000,000 thru 1 – 75,000),
large (1 – 75,000 and larger.)
What are the five major terrain features?
Three minor?
Two supplementary?
Major: Hill, Valley, Ridge, saddle, depression.
Minor: Cliff, spur, draw,
Supplementary: cut, fill.
What are the two techniques for holding the lensatic compass when sighting?
Center hold, compass to cheek.
Define back azimuth.
A back azimuth is the opposite direction of an azimuth.
Name the parts of a lensatic compass.
Base, cover and lens
Maps are classified by what two things?
Scale and type.
What do the different colors of a map represent?
Black-man-made objects.
Red – brown – lines of contour.
Blue – water.
Green – vegetation.
Red – populated areas, main roads and boundaries.
Define azimuth.
A horizontal angle measured clockwise from a north base line.
What are the most common types of compass?
Lensatic, artillery, protractor, wrist watch
What does DAGR mean?
Defense advanced ground positioning system receiver
What are the most common types of maps?
Planimetric, topographic, Photomap, joint operation graphics, photo mosaic, terrain model, military city, special
How do you determine a back azimuth?
To obtain a back azimuth from an azimuth, add 180° if the azimuth is 180° or less; subtract 180° if the azimuth is 180° or more
What is meant by declination?
The angular difference between any two north
What method would you use to determine an unknown point on a map?
Intersection
