The full-power trial of the torpedo boat destroyer Syren (length 219 feet 9 inches overall, 215 feet between perpendiculars, beam 20 feet 9 inches, draught 9 feet 4 inches; displacement370 tons, light, 440 tons fully loaded), built by Palmer's Shipbuilding Company, for the British Government, was carried out at Portsmouth in early September 1901. The starboard engine was running at 382.9 revolutions per minute, and the port engine at 380.2 revolutions per minute, the total indicated horsepower was 6,708. The air pressure in the stokehold was 3.6 inches of water gauge, and the mean speed for the three-hour trial was exactly 30 knots. During the early part of the trial the Syren made six runs over the Stokes Bay measured mile, where the mean horsepower was 6,689, and the speed 29.812 knots.