A navigation system is a (usually electronic) system that aids navigation.
Navigation systems may be entirely on board a vehicle or vessel, or they may be located elsewhere and communicate via radio or other signals with a car or vessel, or they may use a combination of these methods.
Navigation systems may be capable of: containing maps, which may be displayed in human-readable format via text or in a graphical format determining a vehicle or vessel’s location via sensors, maps, or information from external sources providing suggested directions to a human in charge of a vehicle or vessel via text or speech providing recommendations directly to an autonomous vehicle such as a robotic probe or guided missile providing information on nearby vehicles or vessels, or other hazards or obstacles providing information on traffic conditions and suggesting alternative directions.