During the Second World War, Amethyst was deployed mostly on anti-submarine patrols and escort duties. She attacked and sank the U-boatU-1276 with depth charges on 20 February 1945. U-1276 had just sunk HMS Vervain, a Flower-classcorvette. The action took place in the North Atlantic, south of Waterford, and resulted in the loss of all 49 of the U-boat's crew.
On 20 April 1949, Amethyst was on her way from Shanghai to Nanking (now Nanjing) when she was fired upon by the People's Liberation Army. This became known as the Amethyst incident. Amethyst was trapped in China until 30 July 1949, when she escaped under cover of darkness.
For the 1957 film Yangtse Incident: The Story of H.M.S. Amethyst, Amethyst was brought out of reserve to play herself. As the engines were no longer operational, her sister ship Magpie was used for shots of the ship moving. Amethyst was scrapped shortly after the filming was finished.[2]
Hague, Arnold (1993). Sloops: A History of the 71 Sloops Built in Britain and Australia for the British, Australian and Indian Navies 1926–1946. Kendal, England: World Ship Society. ISBN0-905617-67-3.
Leslie Frank, Yangtse River Incident 1949: The Diary of Coxswain Leslie Frank: HMS Amethyst - Yangtse River 19/4/49 to 31/7/49 (2004) ISBN1-84342-756-7
Edwyn Gray, Frigate Under Fire: HMS Amethyst's 100 Days of Hell (1987)
Malcolm H. Murfett, Hostage on the Yangtze: Britain, China, and the Amethyst Crisis of 1949 (1991) ISBN0-87021-289-3