There are many different types of Compass.
A Compass can be used for many things, at sea it is a vital tool, Areoplanes have a compass built into the dashboard as well as Boats and other craft to enable them to navigate much easier.
Land Compass maps are mainly used for long hikes or searching a large area of land on foot or by vehicle.
N = North. E = East.
S = South. W = West.
To view them larger just click on a compass and see the different types.
Find out more by searching the web for compass!