How can a person lost at sea use global positioning system and find out where he or she is?

A person lost at sea can use a Global Positioning System (GPS) device to determine their exact location by receiving signals from multiple satellites orbiting the Earth. By analyzing these signals, the GPS can calculate the user's latitude and longitude coordinates. This information can then be used to navigate towards safety or communicate their position to rescuers. If a smartphone with GPS capabilities is available, it can also provide maps and directions to help the person orient themselves.