Navigation with a compass
The first compass was invented in china,William Thomson,1st Baron kelvin invented them. The four directions are North, South, East and West going clockwise they are NESW. This effect is known as deviation. The compass is used in building and construction for marking landmarks. People use a compass for orienteering, snowboarding, golf, runing, skiing. A compass is used when you work as a boat captain when you make sure the boat is going the right way because you might need to go North or East