In the days since GPS was invented, many of us have lost the skill ... you can then add or subtract the declination angle.

A compass is an age-old tool for navigation. It is simplistic in design and function. In today's high-tech world, the humble compass seems to be somewhat forgotten, replaced by modern technology ...

or if you orient your map with your compass (see page 00) then you have made the two equivalent. Otherwise, you will need to make your own bearing corrections by adding or subtracting the declination ...