A compass rose, sometimes called a windrose or rose of the winds, is a figure on a compass, map, nautical chart, or monument used to display the orientation of the cardinal directions (north, east, south, and west) and their intermediate points.
Answer: It is used to see what direction you're headed.
Explanation: There are letters on it. It is attracted to the earth's magnetic force. So the letters switch when you are a different direction from that magnetic force. :)
