HMS Postillion was a reciprocating engine-powered minesweeper belonging to the Algerine class, constructed during World War II. She was originally ordered for the United States Navy as USS AM 335 by the Toronto Shipbuilding Company, with her keel laid down on 17 November 1942. She was launched on 18 March 1943 and completed by 25 November 1943. However, before she entered U.S. service, she was transferred to the Royal Navy under the Lend-Lease program and commissioned as HMS Postillion on 25 November 1943. The ship measured approximately 225 feet (68.6 meters) in overall length and had a beam of 35 feet 6 inches (10.8 meters). Her draught was 12 feet 3 inches (3.7 meters), and she had a standard displacement of around 1,010 to 1,030 long tons, increasing to about 1,305 to 1,325 long tons at deep load. The vessel's complement consisted of 85 officers and ratings. Power was provided by two vertical triple-expansion steam engines, each driving a single shaft, fueled by two Admiralty three-drum boilers. The combined engines produced about 2,400 indicated horsepower, giving her a maximum speed of 16.5 knots. She carried a fuel oil capacity of 660 long tons, which allowed a range of approximately 5,000 nautical miles at 10 knots. As an anti-submarine and minesweeping vessel, HMS Postillion was armed with a QF 4-inch Mk V anti-aircraft gun and four twin mounts for Oerlikon 20 mm cannons; however, during her construction, shortages meant some ships received single mounts instead. By 1944, these were increasingly replaced with Bofors 40 mm guns. The ship was also equipped with four throwers and two rails for depth charges, enhancing her capability against submarines. After serving in WWII, HMS Postillion was returned to the U.S. Navy in December 1946 and subsequently sold to the Greek Navy in 1947, where she was renamed Machitis. She remained in service until she was ultimately used as a target and sunk off Crete in 1984. Her career highlights her role in wartime minesweeping operations and her transition between Allied navies, exemplifying the versatile design and strategic importance of the Algerine-class minesweepers.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.