The 300 set an international aviation record for seaplanes on 31 December 1933, by flying 3,697 kilometers (2,297 mi) non-stop between Berre Lake near Marseille and Saint-Louis, Senegal.

[1][2] The aircraft then entered service for Air France, transporting mail across the Atlantic Ocean from Dakar, Senegal to Natal, Brazil.

In 1939 the last remaining 301 was converted to military service, joining the 302s in patrol duties in West Africa.

[1] The 302s and converted 301 were in service at the start of World War II, and continued in military service, flying patrols from Dakar until retired due to lack of spare parts, the last aircraft being grounded at the end of 1941.

[1][2] Data from Warplanes of the Second World War, Volume Five, Flying Boats[2]General characteristics Performance Armament