HMS Jason was a Halcyon-class minesweeper of the Royal Navy, constructed to serve primarily in mine clearance operations. Laid down on 12 December 1936 and launched on 6 October 1937, she was completed by 9 June 1938. Measuring 245 feet 6 inches (74.83 meters) in length overall and 230 feet (70.10 meters) between perpendiculars, she had a beam of 33 feet 6 inches (10.21 meters) and a draught of 10 feet 3 inches (3.12 meters) at deep load. Her displacement was 835 long tons (848 tonnes) standard and 1,330 long tons (1,350 tonnes) at deep load. Powered by two Admiralty 3-drum water-tube boilers driving geared steam turbines on two shafts, she could reach a top speed of 17 knots (20 mph). Her armament initially included two QF 4-inch (102 mm) Mk V guns on high-angle mounts, a quadruple Vickers .50 machine gun mount, and up to 40 depth charges for escort roles. During her service, her armament was modified, replacing some guns with 4–8 Oerlikon 20 mm cannons, and the number of machine guns was increased. HMS Jason was primarily involved in surveying operations before WWII, notably in the English and Bristol Channels. After the outbreak of war, she was converted into an anti-submarine vessel and assigned to the 1st Anti-submarine striking force at Belfast. Her early wartime service included convoy defense in home waters, where she faced attacks from German U-boats such as U-32 and U-28, though she was undamaged and rescued survivors from attacked ships. She suffered minor damage from grounding and collision but was repaired promptly. Her convoy escort duties extended to the North West Approaches, notably during the attack on Convoy HX 79, where she rescued numerous survivors amid heavy U-boat and aircraft attacks. In 1942-1943, she was refitted for Arctic operations, notably escorting the Arctic Convoy JW 53 to Murmansk under severe weather conditions, demonstrating her resilience and leadership in icy and stormy seas. Later, she participated in minesweeping and patrol duties along the Russian coast and in support of the Normandy landings, including sweeping mines and providing escort in the English Channel. Her service was marked by intense aerial assaults, including attacks by German aircraft such as Typhoons and Ju 88s, which she often withstood without damage. After WWII, HMS Jason was sold in 1946, renamed Jaslock, and converted into a cargo ship, but she was broken up in 1950. Her career exemplifies the versatility and endurance of the Halcyon-class minesweepers, playing a vital role in convoy protection, Arctic operations, and mine clearance during the war.

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