HMS Shah (D21) was a Ruler-class escort carrier serving in the Royal Navy during World War II. Originally laid down as USS Jamaica (CVE-43) by Seattle-Tacoma Shipbuilding in Tacoma, Washington, she was launched on 21 April 1943. The vessel measured approximately 492 feet 3 inches (150.0 meters) in length, with a beam of 69 feet 6 inches (21.2 meters) and a draught of 25 feet 6 inches (7.8 meters). Her propulsion system comprised a steam turbine powered by two boilers, driving a single shaft that produced 9,350 brake horsepower, enabling her to reach a speed of about 16.5 knots. Constructed with a hull designed as a merchant ship but built specifically as an escort carrier, she was not a conversion. Her flight deck featured a small combined bridge and flight control on the starboard side, two aircraft lifts measuring 43 by 34 feet (13.1 by 10.4 meters), one aircraft catapult, and nine arrestor wires. The hangar below the flight deck was 260 by 62 feet (79.2 by 18.9 meters), providing space for aircraft storage. Her armament included two 4-inch dual-purpose guns, sixteen 40mm Bofors anti-aircraft guns in twin mounts, and twenty 20mm Oerlikon anti-aircraft cannons. Commissioned into the US Navy as USS Jamaica on 15 July 1943, she was transferred to the Royal Navy in September 1943 under lend-lease, renamed HMS Shah, and assigned the pennant number D21. Her initial complement included 851 Naval Air Squadron with 12 Grumman Avengers and Wildcats, with her primary role being convoy defense and anti-submarine warfare in the Indian Ocean. Notably, she participated in sinking U-198 in August 1944 as part of a hunter-killer group. Throughout her service, HMS Shah supported operations in the Indian Ocean, the Burma campaign, and took part in strikes against Japanese targets. In April and May 1945, she was involved in Operation Bishop, and later in efforts to locate the Japanese cruiser Haguro. After the war, she returned to the US and was sold into civilian service in 1947 as Salta. Her post-war service included a notable rescue operation in 1963 when she helped save passengers from the burning Greek liner Lakonia. She was scrapped in Buenos Aires in 1966.

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