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64 Cards in this Set
- Front
- Back
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What publication covers map reading and land nav? |
TC 3-25.26 |
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What are the basic colors of a map, and what does each color represent?
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Black - Man-made features such as buildings and roads, surveyed spot elevations, and all labels. Red-Brown - The colors red and brown are combined to identify cultural features, all relief features, non-surveyed spot elevations, and elevation, such as contour lines on red-light readable maps. Blue - Identifies hydrography or water features such as lakes, swamps, rivers, and drainage. Green - Identifies vegetation with military significance, such as woods, orchards, and vineyards. Brown - Identifies all relief features and elevation, such as contours on older edition maps, and cultivated land on red-light readable maps. Red - Classifies cultural features, such as populated areas, main roads, and boundaries, on older maps. Other - Occasionally other colors may be used to show special information. These are indicated in the marginal information as a rule. |
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What are military symbols?
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Figures used to represent types of military organizations, installations, and activities
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Where is the Legend of the map found?
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Lower left margin
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What are contour lines?
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Imaginary lines on the ground connecting equal elevation, they represent high and low ground elevation.
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What are 3 types of contour lines?
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Index Intermediate Supplementary |
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How many Mils are in one Degree?
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17.7 mils
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How many Norths are there on a military map?
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3. Magnetic north Grid north |
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What must be done to a map before it can be used?
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It must be oriented.
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What are 5 major terrain features found on a map?
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Hill Ridge Valley Saddle Depression |
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What are the 3 minor terrain features found on a military map?
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Draw Spur Cliff |
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What are the 2 supplementary terrain features found on a military map?
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Cut Fill |
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What is a map?
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A map is a graphic representation of a portion of the earth’s surface drawn to scale, as seen from above.
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What is an azimuth?
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A horizontal angle, measured in a clockwise manner from a north base line, expressing direction.
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What is vertical distance?
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The distance between the highest and lowest points measured.
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What is a contour interval?
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The vertical distance between adjacent contour lines on a map.
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What is the distance between grid lines on a combat map?
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1 kilometer or 1000 meters
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How many mils are there in a circle?
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6400 mils in 360 degrees
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Which north is used when using a military map?
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Magnetic north when using a compass, and grid north when using the map
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How would you hold a lensatic compass?
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Away from metal (weapons, electrical devices), level and firm
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Name two ways to hold a compass?
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Compass-to-Cheek Method Center-Hold Method |
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Are topographic symbols drawn to scale?
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No.
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What do topographic symbols represent?
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Man-made and natural features
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In military symbols, what colors are used for a map overlay and what do they represent
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Blue- Friendly forces Red- Enemy forces Black- Boundaries Yellow- Contaminated area both friendly and enemy Green- engineer obstacles, both friendly and enemy |
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What is Back Azimuth?
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The opposite direction of an azimuth.
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How do you figure out a back azimuth?
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To obtain a back azimuth from an azimuth, add 180 degrees if the azimuth is 180 degrees or less; subtract 180 degrees if the azimuth is 180 degrees or more
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What is the general rule for reading military grid coordinates?
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Right and UP
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How many sights does a compass have?
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2.
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What is a benchmark?
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A man-made marker showing points of elevation
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What are parallels of latitude?
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Measured distances going north or south of the equator
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What is an aerial photograph?
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An aerial photograph is any photograph taken from an airborne vehicle (aircraft, drones, balloons, satellites, and so forth)
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What does UTM stand for?
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Universal Transverse Mercator
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The lensatic compass has a bezel ring; each bezel ring click is equal to how many degrees?
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3
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How many times would the bezel ring click if it were fully rotated?
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120
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Large cities on a map are represented by what color?
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Black
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Name two ways to orient a map?
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Use a compass and terrain association
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The arrow on a compass always points what direction?
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Magnetic north
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What does the term FLOT mean?
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Forward Line Of Troops
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What are the alternate colors on a map and what do they mean?
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Gray- alternate color for brown. Yellow- built up areas. Pink- political boundaries. |
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What is longitude?
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Imaginary lines that run north to south originating in Greenwich, England and measured in degrees
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What's a topographic map?
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Portrays terrain and land forms in a measurable way as well as horizontal features of the positions represented |
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What is a small-scale map?
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Those maps with scales of 1:1,000,000 and smaller are used for general planning and for strategic studies.
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What is a medium-scale map?
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Those maps with scales larger than 1:1,000,000 but smaller than 1:75,000 are used for operational planning.
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What is a large-scale map?
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Those maps with scales of 1:75,000 and larger are used for tactical, administrative, and logistical planning.
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What does the term intersection mean?
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Finding the location of an unknown point by sighting two or more known points
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Why is a map so important?
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When used correctly, a map can give you accurate distances, locations and heights, best routes key terrain features and cover and concealment information.
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What does the term resection mean?
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Resection is the method of locating one’s position on a map by determining the grid azimuth to at least two well-defined locations that can be pinpointed on the map.
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If you find a symbol on a map that is unknown to you, where would you look?
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The marginal data, located on the outside lower portion of the map
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How many scales are there on a compass, what are they?
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2. Degrees Mils |
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What are the 4 quadrants on a map?
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Northeast Southeast Northwest Southwest |
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What are the three elements for a land navigation process known as Dead Reckoning
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Known starting point Known distance Known azimuth |
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What is the feature that makes the lensatic compass work well at night?
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The dials and needles are luminous
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What is a polar coordinate?
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Plotting or locating an unknown point using an azimuth and a distance from a known starting point
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What is the name of the map system that the U.S. uses?
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UTM.
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On a lensatic compass there are two rings, an outer black ring and an inner red ring, what are they used for?
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The inner red ring is used to find degrees, and the outer black ring is used to find mils
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Name 3 field expedient methods of determining direction
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The shadow-tip method, the watch method, and the North Star method
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What is a contour level?
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It is the vertical distance between contour lines. The amount of the contour level is located in the Marginal Information on the map.
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The border line around the edge of the map is called the what?
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Neat Line
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Name the different slopes found on a map
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Gentle Steep Concave Convex |
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You must find at least how many known locations on a map and the actual ground in order to plot your location accurately?
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At least 2.
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What are two methods of measuring an azimuth?
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Compass and a protractor
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How close will an eight-digit grid get you to your point?
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10m
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How close will a six-digit grid coordinate get you to your point?
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100m
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What would you use on a map to measure actual ground distance?
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The bar scale
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