Art /Army Competition - TC 3-25.26 Land Navigation
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.
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Which publication covers Land Navigation?
TC 3-25.26
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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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| 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 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 |