Map Reading And Land Navigation TC 3-25.26

Question 1

What is the definition of a map?

Answer 1

A graphic representation of a portion of the earth’s surface, drawn to scale, as seen from above

Question 2

Who is responsible for securing maps for the unit?

Answer 2

S2

Question 3

What are the 3 map sizes?

Answer 3

Small, medium, large

Question 4

Where declination diagram and what it do?

Answer 4

Bottom. It indicates the angular relationships of the 3 norths

Question 5

Colors of map

Answer 5

Black- man made features
Red- populated areas
Green- vegetation
Blue- water
Brown- relief features and elevation
Red-Brown- cultural features and non-surveyed areas

Question 6

What does UTM stand for?

Answer 6

Universal Transverse Mercator Grid

Question 7

How many grid zones is the world divided into?

Answer 7

60

Question 8

How close will an 8 digit grid get you?
6
10

Answer 8

Within 10 meters
6- 100m
10- 1m

Question 9

What is an azimuth?

Answer 9

It is a horizontal angle measured clockwise from a north base line

Question 10

What is the Grid-Magnetic angle?

Answer 10

It’s the angular size that exists between the grid and magnetic north

Question 11

What is intersection?
Resection?
Modified Resection?

Answer 11

INTER- finding an unknown point using 2 known points on the ground and then mapsighting on the location
RES- finding your location using two well defined locations that can be pinpointed on the map
MOD- finding your location using a linear feature such as a road

Question 12

What are the 3 major parts if a compass?
2 methods to use

Answer 12

Cover, base, and lens
Center hold and compass to cheek

Question 13

What is map orientation?

Answer 13

The first step to land nav. North and South of map and ground align

Question 14

What are the 3 land nav methods?

Answer 14

Dead reckoning, terrain association, both

Question 15

How many mils are in a compass?
How many mils in 1 degree?

Answer 15

6400 mils
17.7 mils