Radio transmitter in a fixed location, used in marine and aerial navigation. Ships and aircraft pinpoint their positions by reference to continuous signals given out by two or more beacons. They have largely been superseded by more advanced technologies such as Loran and GPS.
The flag is modelled on the Stars and Stripes of the United States' flag. The stripes represent the nine provinces at the time of liberation. Blue and white are the colours of Argentina and also of national hero, José Gervasio Artigas. Effective date: 12 July 1830.