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
7th Portuguese India Armada (Almeida, 1505) when the armada was absent, the Portuguese factories were very vulnerable. The armies of the Zamorin of Calicut had nearly overrun Cochin twice in the intervening years. The Fifth Armada (1503) under Afonso de Albuquerque had erected a small timber fortress, (Fort Sant'Iago, soon to be renamed Fort Manuel), to protect the factory in Cochin. The Sixth Armada (1504), under Lopo Soares de Albergaria had dropped off a larger Portuguese garrison and a small coastal patrol to harass Calicut and protect the allied cities. But this was not nearly enough against a Zamorin that could call on an army of