The first night aerial crossing over the South Atlantic (and part of North Atlantic) was going to be made in a Portuguese Army Aviation Dornier Do J Wal metallic seaplane, with two Lorraine-Dietrich 450 hp engines, baptised as Argos. The Argos crew included Sarmento de Beires (pilot), Duvalle Portugal (co-pilot), Jorge de Castilho (navigator) and Manuel Gouveia (mechanic).
The Argos took off from the Tagus river near the Alverca military airbase, on the March 7, 1927 and arrived in Casablanca, Morocco on the same day. From Casablanca it flew to Bolama, Portuguese Guinea.
In Bolama, technical problems prevented the takeoff and the pilot Duvalle sacrificed himself, standing on the ground to ease the weight of the aircraft and allow the continuation of the journey. After other problems, Argos took off on April 16 at 18:08, heading to Brazil. Due to engine problems, the mechanic Gouveia needed to intervene twice, saving the flight. The navigator Castilho guided the aircraft to the Brazilian Rocks of Saint Peter and Saint Paul, from which she flew to Fernando de Noronha island, where they arrived at 12:20 h, totalling 2,595 kilometres on an 18-hour, 12-minute flight. Received by the warden on the island, he shouted: "We did not know anything! Furthermore, the planes do not usually arrive by air in Fernando Noronha."
The flight continued with stops in Recife, Natal and Rio de Janeiro. In the latter city, Beires recorded in his diary:We have a great record, 14 speeches in 12 hours. From Portugal, arrives a telegram with congratulations signed by Gago Coutinho.
