First Trans-Atlantic flight over the South Atlantic

The first aerial crossing of the South Atlantic was made by the Portuguese naval aviators Gago Coutinho and Sacadura Cabral in 1922, to mark the centennial of Brazil's independence. Coutinho and Cabral flew in stages from Lisbon, Portugal, to Rio de Janeiro, Brazil, using three different Fairey III biplanes, and covered a distance of 8,383 kilometres (5,209 mi) between March 30 and June 17. Although the North Atlantic had already been traversed in a non-stop flight by John Alcock and Arthur Brown in 1919, Coutinho and Cabral's flight remains notable as a milestone in transatlantic aviation, and for its use of new technologies such as the artificial horizon.

The journey started at the Bom Sucesso Naval Air Station in the Tagus, near the Belém Tower in Lisbon, at 16:30 on March 30, 1922, in the Portuguese Naval Aviation aircraft Lusitânia, a Fairey III-D MkII seaplane specifically outfitted for the journey. The Lusitânia was equipped with an artificial horizon for aeronautical use, a revolutionary invention at the time; according to the Portuguese Navy Museum, testing the horizon was one of the main reasons for the flight.

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