Land Nav TC 3-25.26 Flashcards
What publication covers MAP READING and Land Navigation?
TC 3-25.26
What is the definition of a map?
A map is a graphic representation of a portion of the earth as it would be seen from above.
What does a map provide?
Information on the location of, and the distance between ground features.
What are the basic colors of a map, and what does each color represent?
Black
Red/Brown
Blue
Green
What are military symbols?
Figures used to represent military installations and activities
Where is the Legend of the map found?
Lower left margin
What are contour lines?
Imaginary lines on a map that represent high and low ground elevation
What are the 3 kinds of contour lines?
Index
Intermediate
Supplementary
How many mils are in 1 degree?
17.7 mils
How many North’s are on a military map?
3
True north
Magnetic north
Grid north
What must be done to a map before it can be used?
The map must be oriented by using a compass and terrain association
What are 5 major terrain features found on a map?
The 5 major terrain features are hill, ridge, valley, saddle & depression
What are the 3 minor terrain features found on a military map?
The 3 minor terrain features are draw, spur and cliff
What are the 2 supplementary terrain features found on a military map?
The 2 supplementary terrain features are cut and fill
What is an azimuth?
A horizontal angle, measured in a clockwise manner from a 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?
Magnetic north when using a compass, and grid north when using the map
Why is a map so important?
When used correctly, a map can give you accurate distances, locations and heights, best routes key terrain features and cover and concealment information.
If you find a symbol on a map that is unknown to you, where would you look?
The marginal data, located on the outside lower portion of the map
What are the three main map sizes?
Small, medium & large
What are two methods of measuring an azimuth?
Compass & protractor
How close will an eight-digit grid get you to your point?
10 meters
How close will an six-digit grid get you to your point?
100 meters
What would you use on a map to measure actual ground distance?
The bar scale
What is the name of the map system that the U.S. uses?
UTM
What should you do with a map that is in danger of being captured?
Destroy it
Why should you destroy a map that is in danger of being captured?
Because it could contain troop movements or positions of friendly soldiers.
How many different types of maps are there?
8
What should you use if Military Maps are not available?
Substitute maps.
Foreign military or commercial maps, to field sketches.
7
What should a soldier do prior to using a particular map?
Read the instructions & orient it
What does UTM stand for
Universal Transverse Mercator
How many miles are there in 1 circle
6400 mils
What does the term intersection mean?
It’s the process of finding an unknown point by using 2 or more known points. Your unknown point will be where the 2 known points intersect.
What does the term resection mean?
Method of finding your location on a map by finding the azimuth of 2 or more locations. Your location will be where they cross
Military symbol colors
Blue friendly forces Red enemy Black boundaries Yellow contaminated Green engineer obstacles
You must find at least how many known locations on a map and the actual ground in order to plot your location accurately?
Atleast 20
How do you read a map
Right up
How many meters are there between on grid lines on map
1000
What is true north ? *
True north is the North Pole itself
What is magnetic north?
The direction that the compass needle aligns with the earth’s magnetic field
Arrow head
Grid north
Refers to direction northward along the grid lines of map
