HMS Truant was an S-class destroyer, which served with the Royal Navy. The vessel was the first of the name to enter service in the navy. Launched on 18 September 1918, Truant was too late to see service in the First World War, and, instead of joining the Grand Fleet, the vessel was allocated to Portsmouth to be a tender to HMS Victory. The vessel's subsequent time in service was relatively uneventful, despite gaining a reputation as the fastest destroyer in the fleet, capable of up to 37 knots (69 km/h; 43 mph). However, in 1921, the destroyer became the control ship for the radio-controlled target ship Agamemnon and, in 1923, a similar role with smaller Coastal Motor Boats. This service did not last long. The signing of the London Naval Treaty sounded the death knell for the ship as it l