length would be sufficiently seaworthy", so Hickman built and launched his own privately financed Sea Sled capable of carrying a single 18-inch Whitehead Mark 5 torpedo. In February 1915, this Hickman sea sled demonstrated speeds in rough winter seas off Boston to both US and foreign representatives but again, he received no contracts. The Admiralty representative for this sea sled demonstration was Lieutenant G.C.E. Hampden. In the summer of 1915, Lieutenants Hampden, Bremner, and Anson approached John I. Thornycroft & Company about developing a small high speed torpedo boat, and this effort eventually led to the Coastal Motor Boat which first went into service in April 1916.