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49 Cards in this Set
- Front
- Back
How is a lensatic compass held |
Centerhold and compass-to-cheek |
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What is a map |
A graphic representation of a portion of the earth surface drawn to scale as seen from above |
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What are the five basic colors of a map and what do they stand for |
Blue: water and water features; red: roads and boundaries; black: man-made objects; Green: vegetation; Brown: contour lines elevation and relief |
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Which north is used when using a military map |
Grid north |
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Where is the legend on a map |
Lower left margin |
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What is a back azimuth |
180° in reverse of a measured azimuth |
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What is the basic rule for reading grid coordinates on a military map |
Right and up |
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What is an azimuth |
Direction, defined as a horizontal angle measured from North in a degrees or Mills |
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What are contour lines |
Imaginary lines on the ground the connect points of equal elevation |
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What two things can affect a lensatic compass |
Metal or electricity |
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What are the three types of contour lines |
Index intermediate and supplementary |
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Define resection |
A method used to locate 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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What is longitude |
Imaginary lines that run north and south originating in Greenwich England measured in degrees |
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Define intersection |
A method used to determine the location of an unknown point by successfully occupying at least to known points on the ground and then map sighting on the unknown location |
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What is the scale of a map |
The ratio of ground distance to map distance and expressed in a fraction |
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How many map scales are there and what are the names |
Three: small, medium, and large |
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Name several types of maps |
Topographic map, planimetric map, photomap, and terrain model |
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What is a topographic map |
A map that portrays the layout of terrain features, as well as relief, for the vertical distance of the feature (the distance from sea level) |
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What is a photomap |
An aerial photograph of a portion of the earth surface on which grid lines, place names, and approximate scale and direction of been added |
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What is a planimetric map |
A map that only shows the horizontal positions of features. Differs from a topographic map in that it omits relief, usually represented by contour lines |
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What is marginal information |
Instructions about the maps use, size, and area |
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Where can the map sheet name be found |
Two places; the center of the upper margin and either the right or left side of the lower margin |
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What is a declination diagram |
Shows the angular relationships of true north, grid north, and magnetic north |
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What is a bar scale |
A ruler used to convert map distance to ground distance |
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How many scales are there on the compass |
Two |
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What are the usual three units of measure in a bar scale |
Meters, statute miles, nautical miles |
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Lines of longitude are also known as what |
Meridians |
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Lines of latitude are also known as what |
Parallels |
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What type of map system does the US military use |
The universal transverse mercator (UTM) grid |
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What portion of the world is a UTM map designed for |
The part of the world between latitude 84° north, and latitude 80° south |
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What is a map overlay used for |
Shows current information about friendly an enemy true positions, as well as any other pertinent Data a leader they need to know about a certain area. For instance-landmines, communication lines, and obstacles |
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How is waterflow determined on a map |
Contour lines will form a "V" which will point upstream |
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What are the two most common compasses used in the army |
Lensatic and artillery compasses |
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How many MILS are on a compass |
6400 |
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And artillery compass is known as what type of compass |
And M-2 compass |
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Name the two scales on a compass |
Mils and degrees |
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How many degrees is one click on the bezel ring |
3°, for a total of 120 clicks |
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Name the quadrants of a map |
Northeast, Northwest, Southeast, Southwest |
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What is a "FLOT" |
Forward line of troops |
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What colors are using a map overlay, and what do they mean |
Black, boundaries; blue, friendly forces; red, enemy forces; yellow, contaminated area; green, engineer obstacles |
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When colors are not used what symbol is used for enemy forces |
Double lines |
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What size unit is indicated by three dots |
A platoon or detachment |
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Name the five major terrain features |
Hill, Valley, Ridge, saddle, and depression |
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Name the two supplemental terrain features |
Cut and fill |
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Name the minor terrain features on a map |
Cliff, draw, and spur |
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What is a base line |
The starting point or point of reference from which a unit of measure is taken |
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What is latitude |
The distance north or south from the equator |
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Name the three norths on a military map |
True north, magnetic north, and grid North |
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What document covers map reading and land navigation |
FM 3–25.26 |