(top left) Waveney: Length overall 44ft; beam 12ft 6in; draught 4ft; displacement 18 tons; maximum speed, over 15 knots; range at full speed, 167 nautical miles. The Waveney, introduced in 1967 from the USA, lies afloat and has a crew of five. Her hull is built of steel. photograph by courtesy of H. E. Appleton.