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
Afonso de Albuquerque to the city, his ships decorated with banners, firing cannon volleys. He declared himself lord of all the navigation, demanded the Sultan release the prisoners and pay for damages, and demanded consent to build a fortified trading post. The Sultan eventually freed the prisoners, but was unimpressed by the small Portuguese contingent. Afonso then burned some ships at the port and four coastal buildings as a demonstration. The city being divided by the Malacca River, the connecting bridge was a strategic point, so at dawn on 25 July the Portuguese landed and fought a tough battle, facing poisoned arrows, taking