Magnetic Bearing to Map Bearing: If you use your compass to take a bearing from your current position to a point on the landscape, then you are working with the magnetic bearing.

Convert these magnetic bearings to map bearings by subtracting the west declination from each reading. Plot these lines on the map and where they intersect is your location.

Mapping Magnetic maps helped 18th century mariners How navigators kept track of an unseen force that could affect their course May 23, 2016 210 words 1 minutes By Harry Wilson ...