These are a series of regular lines meant to help you interpret the scale of a map. Just place them on top of the map, and compare them to the appropriate scale to measure the approxi… See more

If you get disoriented during a trip, you may need to take a good look at the details on your map. Because of this, many of the more expensive models now include a small magn… See more

In compasses with a rotating dial, you will most likely also have a direction-of-travel arrow. This is a larger, visible arrow that usually points directly to the top of the baseplate. … See more

This is an additional set of marks that usually only appears on very high-end models. They are meant to help you calculate the difference between the True North and t… See more