Launch! The Lizard-Cadgwith lifeboat, The Duke of Cornwall (Civil Service No. 33), a 52' Barnett housed slipway boat built in 1960, was named by HRH The Duke of Edinburgh on July 7, 1961. She has launched on service 56 times and saved 58 lives. Her twin 6LW cylinder Gardner diesel engines give her a maximum speed of 9J knots or cruising speed of 8J knots. At full speed her total range is 390 miles; at cruising speed 552 miles. She carries 240 gallons of fuel..