Map Reading and Land Navigation - Army Rank-Up - Study App for Army Promotion Board

What Training Circular covers Map Reading and Land Navigation?
TC 3-25.26
What is a map?
A graphic representation of a portion of the earth’s surface drawn to scale, as seen from above.
Maps can be categorized as—
  1. Small: 1:1,000,000 scale
  2. Medium: 1:1,000,000 to 1:75,000 scale
  3. Large: 1:75,000 and larger
What is the map of choice for land navigators?
The 1:50,000 scale military topographic map
What are the colors on a military map?
  1. Black: man-made features
  2. Blue: hydrography or water features
  3. Brown: contours, elevation, relief
  4. Green: vegetation
  5. Red: populated areas, main roads
It is composed of imaginary lines on the ground that connect points of equal elevation?
Contour lines
The three types of contour lines include—
Grid coordinate scales
  1. Index: Starting at zero elevation or mean sea level, every fifth contour line is a heavier line.
  2. Intermediate: The contour lines falling between the index contour lines.
  3. Supplementary: These contour lines resemble dashes.
What is the military principle for reading maps?
 Grid coordinate scales
Read from left to RIGHT, then UP
Locations on the map can be determined by—
 Grid coordinate scales
Grid coordinates
What are the two methods used to determine distance on a map?
  1. Bar scale method
  2. Pace count method
How to use the pace count method accurately?
Soldiers must know how many paces it takes to walk 100 m (on a straight line)

* The average person uses 116 paces to travel 100 meters.
How close can a point be located in a four-digit, six-digit, and eight-digit grid coordinate?
1,000 meters, 100 meters, and 10 meters
What are the three Norths (base lines)?
 Three Norths
  1. True: Points to North Pole
  2. Magnetic: Points to megnetic field surrounding North Pole
  3. Grid: North as depicted on map
What are the primary navigational tools used when moving in an outdoor world?
  1. Lensatic compass
  2. GPS devices
What are the two lensatic compass holding techniques?
  1. Centerhold technique
  2.  Grid coordinate
                        scales
  3. Compass-to-cheek- technique
  4.  rid
                        coordinate scales
What are the two scales in a military compass?
  1. Outer scale/mils (black)
  2. Inner scale/degrees (red)
Can the lensatic compass be used in the dark?
Yes, one of the two lines in the compass are luminous lines
What can affect the performance of a compass?
Metal objects and electrical sources
Which North is used when using a Military map?
Grid north
This lines (aka meridians) run northsouth, specifies the east-west position of a point?
Longitude
What is the distance of a point north or south of the equator called?
Latitude
The direction from one point to another point (either on the map or on the ground) is called?
Azimuth
What is 180 degrees in reverse of measured azimuth?
Back azimuth
What are the three categories of terrain features?
  1. Major
  2. Minor
  3. Supplementary
What are the Major terrain features?
  1. Hill, contour lines forming concentric circles
  2.  rid coordinate
                      scales
  3. Valley, high ground on three sides, river
  4.  rid coordinate
                      scales
  5. Ridge, sloping line of high ground
  6.  rid coordinate
                      scales
  7. Saddle, between two areas of high ground
  8.  rid coordinate
                      scales
  9. Depression, low point/sinkhole
  10.  rid coordinate
                      scales
What are the Minor terrain features?
  1. Spur, U/V shape contour lines away from high ground; streams to either side
  2.  rid coordinate
                      scales
  3. Draw, U/V shape contour lines point toward high ground; stream in center
  4.  rid coordinate
                      scales
  5. Cliff, vertical or near-vertical drop, steep point with contour lines converging
  6.  rid coordinate
                      scales
What are the Supplementary terrain features?
  1. Cut, formed by cutting into the ground
  2. Fill, formed by filling out of the ground
  3.  rid coordinate
                      scales
What 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?
Resection
What is the location of an unknown point by successively occupying at least two (preferably three) known positions on the ground, and then map sighting on the unknown location?
Intersection

Terms List

1: What Training Circular covers Map Reading and Land Navigation?
2: What is a map?
3: Maps can be categorized as—
4: What is the map of choice for land navigators?
5: What are the colors on a military map?
6: It is composed of imaginary lines on the ground that connect points of equal elevation?
7: The three types of contour lines include—
8: What is the military principle for reading maps?
9: Locations on the map can be determined by—
10: What are the two methods used to determine distance on a map?
11: How to use the pace count method accurately?
12: How close can a point be located in a four-digit, six-digit, and eight-digit grid coordinate?
13: What are the three Norths (base lines)?
14: What are the primary navigational tools used when moving in an outdoor world?
15: What are the two compass holding techniques?
16: What are the two scales in a military compass?
17: What are the two scales in a military compass?
18: Can the lensatic compass be used in the dark?
19: What can affect the performance of a compass?
20: Which North is used when using a Military map?
21: This lines (aka meridians) run northsouth, specifies the east-west position of a point?
22: What is the distance of a point north or south of the equator called?
23: The direction from one point to another point (either on the map or on the ground) is called?
24: What is 180 degrees in reverse of measured azimuth?
25. What are the three categories of terrain features?
26. What are the Major terrain features?
27. What are the Minor terrain features?
28. What are the Supplementary terrain features?
29. What 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?
30. What is the location of an unknown point by successively occupying at least two (preferably three) known positions on the ground, and then map sighting on the unknown location?