HMS Anchusa (K186) was a British corvette from the Second World War. The keel for this unit was laid in 1940, the launch took place in January 1941, and entry into service took place in the same year. The total length of the ship was 62.5 meters and a width of 10.1 meters. Full displacement reached approx. 1,150 tons, and maximum speed – to approx. 16-16.5 knots. The ship’s armament included: a single 102 mm cannon, a 40 mm cannon, depth charge dumps, and two depth charge launchers.

HMS Anchusa (K186) was one of the Flower class gunboats. The ships of this type were designed as units intended primarily for the protection of Allied Atlantic convoys, and their main task was ZOP (anti-submarine combat) activities. Their design was simplified as much as possible, as it was supposed to be suitable for mass production of units even in small shipyards, without adequate experience. Units of this type had an archaic, for the years of World War II, but simple to build, a power plant based on a reciprocating steam engine, and not – which was rather standard then – a steam turbine. During the war, units of this type were modernized – mainly by adding new hydroacoustic devices. One of the ships of this class was just HMS Anchusa (K186), which was built at the Harland and Wolff shipyard in Belfast, Northern Ireland. Initially, it was built for France, but after its defeat in the summer of 1940, the as-yet-yet-to-date unit was taken over by the Royal Navy. The ship was primarily on patrol duty and protected convoys in the Atlantic. During the service, the ship underwent two modernizations. The first – in 1942 – concerned the modernization of the weaponry, and the second – from 1944 – concerned the change of equipment. In the declining period of the war, the unit also performed a patrol service in the English Channel. Shortly after the end of the war, the unit entered the civil service, where its name was changed twice: to Silverlord and Sir Edgar. It was eventually cut for scrap in 1960.