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Army Competition - TC 3-25.26 Land Navigation

Other Subjects34 CardsCreated 3 months ago

This deck covers key concepts and questions from the TC 3-25.26 Land Navigation guide, focusing on map reading, terrain features, and navigation techniques.

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What is a Map?

A graphic representation of a portion of the Earth’s surface drawn to scale, as seen from above.
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Key Terms

Term
Definition
What is a Map?
A graphic representation of a portion of the Earth’s surface drawn to scale, as seen from above.
Which publication covers Land Navigation?
TC 3-25.26
What is the purpose of a map?
To provide accurate information about the existence, location, and distance between ground features.
What are the major terrain features?
Hill, valley, ridge, saddle, depression.
What are the colors on a military map, and what do they represent?
Black–man-made features, buildings and roads. Blue–water features Green–Vegetation Red–roads, cultural features Brown–relief features, cultivated land...
What are contour lines?
They show relief and elevation.
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Army Competition - TC 3-25.26 Land Navigation
TermDefinition
What is a Map?
A graphic representation of a portion of the Earth’s surface drawn to scale, as seen from above.
Which publication covers Land Navigation?
TC 3-25.26
What is the purpose of a map?
To provide accurate information about the existence, location, and distance between ground features.
What are the major terrain features?
Hill, valley, ridge, saddle, depression.
What are the colors on a military map, and what do they represent?
Black–man-made features, buildings and roads. Blue–water features Green–Vegetation Red–roads, cultural features Brown–relief features, cultivated land Red-brown–contour lines, cultural and relief features.
What are contour lines?
They show relief and elevation.
List the 3 types of contour lines.
Index, Intermediate, Supplementary.
List the 3 Norths on a military map.
True North Magnetic North Grid North
Where is the map legend found?
Lower left margin
What must be done to a map before it can be used?
It must be oriented.
List the 3 minor terrain features.
Draw, Spur, Cliff
List the 2 supplementary terrain features.
Cut. Fill
What is an azimuth?
A horizontal angle measured clockwise from a north base line, used to express direction.
What is the distance between grid lines on a combat map?
1Km
How many mils are in a circle?
6400 mils in 360 degrees
Name two ways to hold a compass.
Compass-to-cheek method. Center-hold method
How do you figure out a back-azimuth?
Add or subtract 180 degrees
What is a declination diagram?
Angular relationship between magnetic, grid, and true north.
What are the common scale sizes for maps?
1: 1,000,00 1: 250,000 1: 50,000
What are two methods for determining unknown map locations?
Intersection: location of an unknown point Resection: locating one’s position
What are 4 methods of measuring a direction?
Lensatic compass M2 Artillery compass Wrist/Pocket compass protractor
How close will an eight digit grid get you to your point? 6 digit? 4 digit?
10m 100m 1000m
What units of measurement are used for direction?
Degree, Mil, Grad
3 field-expedient methods of determining the cardinal directions?
Shadow-tip method Watch method Star method
What is a military city map?
Topographic map showing the details of a city, including street names and important buildings
What is the scale commonly used for a military city map?
1:12,550 scale, sometimes 1:5,000
Describe the flash to bang method for measuring distance.
Determines range to an explosion or enemy fire. Count the seconds between when you see the flash and hear the weapon. Each second is 330m to the target.
What symbol represents true north?
Star
What are some methods of depicting relief?
Contour lines, form lines, relief shading, hachures, layer tinting
What is meant by the Military Grid Reference System?
Used as a geocode for the globe; point reference system derived from the UTM and UPS grid system
Military maps are categorized by what 2 things?
Scale and type
The graphic scale is divided into 2 parts, what are they?
Primary to the right of 0, extension to the left
Where does a map generally get its name?
Largest settlement or natural feature in the area
What does UTM stand for?
Universal Transverse Mercator Grid