FWIW
The best compass to use is the one that you have with you.
Having a compass with you does not mean that you know how to use it.
Learn the meaning of magnetic declination and inclination and how to correct for it in the area where you are traveling.
Be aware that the angles of declination and inclination do not remain constant and are regularly updated.
Choose your compass by hemisphere, function(s), durability and weight.
Compass readings can be interfered with by ferrous metals. For example a high carbon steel neck knife.
From personal experience on the AT remember that for published trail guides NOBO means you are traveling towards Maine and right is East and left is West regardless of what your compass tells you. ;-)
Maps and compasses generally do not require batteries. One of Murphy's laws is that a battery will run low or out of power when needed the most.
Using a compass and map is like driving a standard transmission automobile. It isn't often necessary these days but it is still a useful and fun talent.
Party On,
Newton

