Ascension Island a staging point by the British military during the Falklands War. Ascension Island hosts one of four ground antennas (others are on Kwajalein Island, Diego Garcia, and Cape Canaveral) that assist in the operation of the Global Positioning System (GPS) navigational system. NASA operates a Meter Class Autonomous Telescope (MCAT) on Ascension Island for tracking orbital debris, which is potentially hazardous to operating spacecraft and astronauts, at a facility called the John Africano NASA/AFRL Orbital Debris Observatory. In 1501, the Portuguese navigator Afonso de Albuquerque sighted the island on Ascension Day (which fell on 21 May that year) and named
5th Portuguese India Armada (Albuquerque, 1503) captain Nicolau Coelho (the old veteran of Gama's 1497 expedition and Cabral's 1500 armada). The third captain is uncertain (possibly Fernão Rodrigues Bardaças, one of the patrol captains?). They would never be heard from again. It is presumed that F. de Albuquerque and Nicolau Coelho were caught by bad currents in the Mozambique Channel and shipwrecked or sunk off the coast of South Africa. A rescue expedition would be launched in late 1505 (under Cide Barbubo & Pedro Quaresma) to search for them. In February 1504, Afonso de Albuquerque's squadron made its first stop at Mozambique Island. But things had