
So here is a brief tutorial on the steps for using a map and compass effectively. Before you set off on your off-trail adventure, it's best to practice your map and compass skills in the front country.
Map to Terrain
- Set declination (the declination is the degree to which magnetic north differs from true north, which varies based on where you are and will be noted on your map)
- Put straightedge of compass baseplate on your location and your destination – point direction of travel arrow (etched arrow on top of baseplate) in desired travel direction.
- Line up orienting lines inside compass housing so they are aligned vertically and parallel with true north, south lines on map
- Make sure north on compass dial faces north on map
- Remove compass from map and “box” magnetic arrow needle
- With needle boxed, follow direction of travel arrow
Terrain to Map (triangulation)
- Set declination
- Shoot an azimuth (the direction in degrees the feature is from you) to known landscape feature (magnetic arrow needle will be boxed)
- Put compass baseplate on known landscape feature on map and turn entire compass until orienting lines inside compass
- Housing are aligned vertically and parallel with north, south lines on map – make sure north on compass is pointing is facing north on map – disregard magnetic needle now – it won’t be boxed
- Draw line along baseplate straightedge – your location is somewhere on that line
- To pinpoint location, repeat process on 2 or 3 more landscape points
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