The tool navigators used to find directions a long time ago is known as a compass. A compass is a device that uses the Earth's magnetic field to indicate the direction of true north. It consists of a magnetized needle that is free to rotate and aligns itself with the Earth's magnetic field lines. The needle points to the magnetic North Pole, which is located near the geographic North Pole. By aligning the compass with the magnetic field, navigators could determine the cardinal directions (north, south, east, and west) and use this information to navigate and determine their position on Earth.