Grid North To Magnetic North Conversion

The legend also states that the magnetic north is 1°54′ west (1.9°) for 2011 and is estimated to move east 09′ every year, which means we have 1°18′ (1.3°) difference between true north and magnetic north. Short video explaining how to convert from grid north to magnetic north. So if you’re a fan of this forces' favourite mnemonic to remind you how to make the.

In an ideal location you have grid north = magnetic north so start there. The only way to know the difference is to define them. This means true north is 0.85° west (fun fact:

Each minute is 0.0166° west, so 51*0.0166=0.85°).

The phrase 'mag to grid, get rid & grid to mag, add' is a simple mnemonic to help you remember how to make the correct adjustment after either taking a bearing using a magnetic compass or taking a grid bearing from a map. Grid north contrasts the true north and the magnetic north in that it is aligned to grid lines and always points upwards on a map. To convert from a grid azimuth to a magnetic azimuth substitute from relationship #1 into relationship #2 to derive relationship #3 as shown immediately above, taking care to retain the sign of all angles involved. Magnetic north is the direction indicated by a magnetic compass.