Displacing 420 tons, H.M.S. Velox measured 210 feet in length with a 21 foot beam and was modestly armed with 1-12pdr., 5-6pdrs. and 2-torpedo tubes. Fitted with quadruple screws, she had two pairs of Parsons' turbines (High and Low Pressure) and a reciprocating cruising engine by Paul of Dumbarton. Her active career was a very limited and by 1909, she was deemed unfit for further service and attached to H.M.S. Vernon for use as an instructional vessel. When the Great War began in 1914, she was re-instated to active duty, and whilst out on a routine patrol, H.M.S. Velox hit a mine off the Nab Light Vessel and sank on 25th October 1915, apparently without loss of life. H.M.S. Velox takes her place in naval history as the boat which proved the case for turbine power and paved the way for the generations of versatile and high-powered destroyers which followed.