 Cdr Schwann covered the rear section of the fuselage, modified the tailplane, moved the radiator to a position lying flat over the wing centre section and a series of experimental floats were lashed to the skids.Taxying trials were carried out in the Cavendish Dock using narrow flat-bottomed floats.On 18 November 1911, flown by Cdr Schwann it became the first seaplane to take off from British sea water.