Parts of a Compass

1. There are rulers that can be used along with map scale to help calculate distance.
2. A direction of travel arrow reminds which direction to point the compass when taking a bearing.
3. The big arrow called the orienting arrow which we’ll use to help orient the bezel.
4. Some compasses have a handy declination scale which makes it easier to adjust declination.
5. The big circle dial with degrees is the rotating bezel which is marked with degrees from N clockwise up to 360.
6. There is a little marker called the index line which marks where bearings can be read.
7. Inside the bezel, the first thing can be noticed is the magnetized needle which always points to the magnetic north pole, not the true North Pole.
8. Alongside the orienting arrow our orienting lines that can be used to help line up the compass with north on a map.
9. A liquid capsule that contains the magnetic needle is rotating housing. The liquid helps dampen the needle movement, making it easier to get a more accurate reading.
10. The base plate is clear so the map below it can be seen, and there’s always at least one straight edge that can be used later for taking bearings.

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