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) if more could be procured there - Quilon having been better connected to Ceylon and points east, its spice supply was not as dependent on the Zamorin's sway and had often invited the Portuguese before. But soon after their departure, Albuquerque heard that the Zamorin of Calicut was preparing a Calicut fleet of some 30 ships for Quilon. Afonso de Albuquerque left Cochin and hurried down to Quilon himself. Albuquerque arrived in Quilon, and instructed the Portuguese factor to hurry his business along, and sought out an audience with the regent-queen of Quilon. They were still docked when the Calicut