Professional Prismatic Outdoor Compass (BML45-10)

A compass is a navigational tool that uses the Earth's magnetic field to determine direction. It consists of a magnetized needle that is free to rotate and aligns itself with the Earth's magnetic field. The applications of a compass include:

1. Navigation: A compass is often used in navigation to determine the direction of travel. It can be used in various outdoor activities, such as hiking, camping, and orienteering.

2. Surveying: A compass is used in surveying to determine the direction and orientation of land features, such as boundaries and property lines.

3. Mining: A compass is used in mining to determine the orientation of underground mineral deposits and to help guide drilling and excavation.

4. Construction: A compass is used in construction to determine the direction and orientation of building foundations, walls, and other structures.

5. Aviation: A compass is used in aviation to help pilots navigate and maintain course during flight.

6. Marine navigation: A compass is used in marine navigation to help sailors navigate and maintain course at sea.