Once you have your declination, subtract it from your compass bearing for west and add it for east. If you have trouble remembering that rule, try this mnemonic: Maps Tell Almost Everything.

For our exercise, let’s assume you are east of the agonic line and know your declination is 6 degrees. Since your compass is magnetized and 6 degrees off, you must add 6 to your 150.

For example, if you follow a compass reading of 0° (north) without taking the declination into account, you’ll actually be heading 10° east of true north. Over long distances, even small ...

Once you have your declination, subtract it from your compass bearing for west and add it for east. If you have trouble remembering that rule, try this mnemonic: Maps Tell Almost Everything ...

Compass housing (Bezel): The spinning marked with N,E,S,W, the cardinal directions, and 360 degrees, ... Because even if the declination only changed by one degree, ...

Set up your compass. You’re going to have to adjust your compass’ declination because, and we’re sorry to be the bearers of bad news, it doesn’t actually show you the same North as on your ...