RAF Gatow has the unique and unlikely distinction of being the base for the only known operational use of flying boats in central Europe, during the Berlin Blockade, on the nearby Wannsee, a lake in the Havel river. On 6 July 1948, the RAF began using 10 Short Sunderland and 2 Short Hythe flying boats, flying from Finkenwerder on the Elbe near Hamburg to Berlin. These were supplemented by the flying boat operations of Aquila Airways, an early post-war British independent airline that became an operating division of British Aviation Services. The flying boats' specialty was transporting bulk salt, which would have been very corrosive to other aircraft, but was not as corrosive to the flying boats because of their anodised skins.