What does resection mean?

What does resection mean?

• A. 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
• B. The technique of triangulation from star sightings
• C. The process of aligning a map to magnetic north
• D. The action of marking features on a map

Answer: (A)

Resection fixes your position on a map by using bearings to two (or more) known landmarks you can identify on the map. You stand at your unknown spot, measure the grid azimuth to each landmark with a compass, and then plot a line from each landmark toward your position on the map using those azimuths. Where the two lines intersect on the map is your estimated location. You need at least two lines to get a definite fix; more landmarks can improve accuracy. Remember to convert magnetic bearings to grid bearings if the map uses grid north, accounting for any magnetic declination. The landmarks should be clearly identifiable on the map and in the terrain to minimize angular error. This method is distinct from celestial navigation, map-orientation tasks, or simply marking features on a map.

Resection fixes your position on a map by using bearings to two (or more) known landmarks you can identify on the map. You stand at your unknown spot, measure the grid azimuth to each landmark with a compass, and then plot a line from each landmark toward your position on the map using those azimuths. Where the two lines intersect on the map is your estimated location. You need at least two lines to get a definite fix; more landmarks can improve accuracy. Remember to convert magnetic bearings to grid bearings if the map uses grid north, accounting for any magnetic declination. The landmarks should be clearly identifiable on the map and in the terrain to minimize angular error. This method is distinct from celestial navigation, map-orientation tasks, or simply marking features on a map.