Accounting /NCO Board Map Reading and Land Navigation, TC 3-25.26 & FM 3-25.26 Part 5
NCO Board Map Reading and Land Navigation, TC 3-25.26 & FM 3-25.26 Part 5
This deck covers key concepts from TC 3-25.26 & FM 3-25.26 Part 5, focusing on map reading, land navigation, and the use of compasses and aerial photography.
Para 6-7 | How do you Determine your location using Intersection when using the map and compass method?
(1) Orient the map using the compass. (2) Locate and mark your position on the map, (3) Determine the magnetic azimuth to the unknown position using the compass. (4) Convert the magnetic azimuth to grid azimuth. (5) Draw a line on the map from your position on this grid azimuth. (6) Move to a second known point and repeat steps 1, 2, 3, 4, and 5. (7) The location of the unknown position is where the lines cross on the map. Determine the grid coordinates to the desired accuracy.
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Key Terms
Term
Definition
Para 6-7 | How do you Determine your location using Intersection when using the map and compass method?
(1) Orient the map using the compass. (2) Locate and mark your position on the map, (3) Determine the magnetic azimuth to the unknown position using t...
Para 6-7 | How do you Determine your location using Intersection when straight edge method is used when a compass is not available?
(1) Orient the map on a flat surface by the terrain association method. (2) Locate and mark your position on the map. (3) Lay a straight edge on the m...
Para 6-8 | How do you Determine your location using Resection when using the map and compass method?
(1) Orient the map using the compass. (2) Identify two or three known distant locations on the ground and mark them on the map. (3) Measure the magnet...
Para 6-8 | How do you Determine your location using Resection when using the straightedge method?
(1) Orient the map on a flat surface by the terrain association method. (2) Locate at least two known distant locations or prominent features on the g...
Para 6-9 | How do you Determine your location using the Modified Resection?
1. Orient the map using a compass or by terrain association. 2. Find a distant point that can be identified on the ground and on the map. 3. Determine...
Para 8-2 | What are the two major types of Aerial Photography?
the vertical and the oblique
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Term | Definition |
---|---|
Para 6-7 | How do you Determine your location using Intersection when using the map and compass method? | (1) Orient the map using the compass. (2) Locate and mark your position on the map, (3) Determine the magnetic azimuth to the unknown position using the compass. (4) Convert the magnetic azimuth to grid azimuth. (5) Draw a line on the map from your position on this grid azimuth. (6) Move to a second known point and repeat steps 1, 2, 3, 4, and 5. (7) The location of the unknown position is where the lines cross on the map. Determine the grid coordinates to the desired accuracy. |
Para 6-7 | How do you Determine your location using Intersection when straight edge method is used when a compass is not available? | (1) Orient the map on a flat surface by the terrain association method. (2) Locate and mark your position on the map. (3) Lay a straight edge on the map with one end at the user’s position (A) as a pivot point; then, rotate the straightedge until the unkown point is sighted along the edge. (4) Draw a line along the straight edge (5) Repeat the above steps at position (B) and check for accuracy. (6) The intersection of the lines on the map is the location of the unknown point (C). Determine the grid coordinates to the desired accuracy. |
Para 6-8 | How do you Determine your location using Resection when using the map and compass method? | (1) Orient the map using the compass. (2) Identify two or three known distant locations on the ground and mark them on the map. (3) Measure the magnetic azimuth to one of the known positions from your location using a compass. (4) Convert the magnetic azimuth to a grid azimuth. (5) Convert the grid azimuth to a back azimuth. Using a protractor, draw a line for the back azimuth on the map from the known position back toward your unknown position. (6) Repeat 3, 4, and 5 for a second position and a third position, if desired. (7) The intersection of the lines is your location. Determine the grid coordinates to the desired accuracy. |
Para 6-8 | How do you Determine your location using Resection when using the straightedge method? | (1) Orient the map on a flat surface by the terrain association method. (2) Locate at least two known distant locations or prominent features on the ground and mark them on the map. (3) Lay a straightedge on the map using a known position as a pivot point. Rotate the straightedge until the known position on the map is aligned with the known position on the ground. (4) Draw a line along the straightedge away from the known position on the ground toward your position. (5) Repeat 3 and 4 using a second known position. (6) The intersection of the lines on the map is your location. Determine the grid coordinates to the desired accuracy. |
Para 6-9 | How do you Determine your location using the Modified Resection? | 1. Orient the map using a compass or by terrain association. 2. Find a distant point that can be identified on the ground and on the map. 3. Determine the magnetic azimuth from your location to the distant known point. 4. Convert the magnetic azimuth to a grid azimuth. 5. Convert the grid azimuth to a back azimuth. Using a protractor, draw a line for the back azimuth on the map from the known position back toward your unknown position. 6. The location of the user is where the line crosses the linear feature. Determine the grid coordinates to the desired accuracy. |
Para 8-2 | What are the two major types of Aerial Photography? | the vertical and the oblique |
Para 8-2 | What is Vertical Photography? | A vertical photograph is taken with the camera pointed as straight down as possible |
Para 8-2 | What the two types of Oblique Photography? | The Low Oblique and the High Oblique |
Para 8-2 What is Low Oblique Photography? | This is a photograph taken with the camera inclined about 30° from the vertical |
Para 8-2 | What is High Oblique Photography? | The high oblique is a photograph taken with the camera inclined about 60° from the vertical |
Para 8-2 | What is a Trimetrogon? | This is an assemblage of three photographs taken at the same time, one vertical and two high obliques, in a direction at right angle to the line of flight |
Para 9-1 | What is the most common and simplest instrument for measuring direction? | The lensatic compass |
Para 9-1 | What are the four different types of compasses used for measuring direction? | 1. The lensatic compass 2. The artillery M2 compass 3. The wrist/pocket compass 4. A protractor |
Para 9-1 | What is the The artillery M2 compass? | The artillery M2 compass is a special-purpose instrument designed for accuracy |
Para 9-1 | What is the wrist/pocket compass? | The wrist/pocket compass is a small magnetic compass that can be attached to a wristwatch band. It contains a north-seeking arrow and a dial in degrees |