HMS Loch Insh ( K433 ) HMS " Loch Insh " ( K433 / F433 ) was a Loch - class frigate of the Royal Navy , named after Loch Insh in Scotland . She was built by Henry Robb of Leith and launched on 10 May 1944 . After service at the end of World War II she was decommissioned , but reactivated in 1950 and served , mostly in the Persian Gulf , until 1962 . The ship was sold to the Royal Malaysian Navy in 1963 , and renamed KD " Hang Tuah " ( F433 ) . She was scrapped in 1977 . Service history . World War II . After commissioning and sea trials " Loch Insh " joined the 19th Escort Group at Liverpool in November 1944 . The Group was deployed for convoy defence in the North - West Approaches and the Irish Sea . For 14 hours on 6 December " Loch Insh " and hunted for off Cape Wrath , but the U - boat , which had torpedoed the frigate and sent her to the bottom , escaped undamaged . In January 1945 the Group was transferred to the English Channel for anti - submarine operations . In February it operated in the Irish Sea and South - Western Approaches , and in April was assigned to support the Russian Convoys . On 18 April " Loch Insh " and 19 EG joined the escort for Russian Convoy JW - 66 , arriving at Kola Inlet on the 25th after an uneventful passage . After anti - submarine operations off the Russian coast , the Group departed with Convoy RA - 66 for the return journey . On 29 April , in the Barents Sea , " Loch Insh " sank using " Shark " anti - submarine projectiles and her Squid anti - submarine mortar , and the same day , with frigates and she sank . " Loch Insh " was detached from RA - 66 with the other ships of 19 EG before their arrival in the Clyde and sent to Leith to refit and prepare for foreign service . On 23 August she departed Rosyth to join the East Indies Escort Force , arriving at Colombo on 25 October . There she acted as escort to repatriation convoys . After a visit to the coast of East Africa , " Loch Insh " returned to the UK in April 1946 and was decommissioned and placed in Reserve at Devonport . Whilst in Reserve her Pennant number was changed to F433 . 1950 – 1962 . After a refit " Loch Insh " was recommissioned on 21 September 1950 to serve with 6th Frigate Flotilla , Home Fleet , for exercises and visits . In April and May 1951 she joined to search for missing submarine . In April 1952 she was decommissioned and was laid up at Devonport in readiness for a programme of extensive modernisation , of which " Loch Insh " would be the prototype for the rest of her class . The work finally began in May 1953 and took over a year . Recommissioned on 6 September 1954 , she completed her sea trials in the Mediterranean , before arriving at Bahrain in December for duty in the Persian Gulf alongside . Her primary task was the protection of British tanker shipping , and she carried out a regular routine of patrols and port visits until returning to the UK in August 1955 . After a refit she returned to Persian Gulf patrol duty in March 1956 . During the Suez Crisis ( " Operation Musketeer " ) " Loch Insh " was based at ( Bahrain where she protected Sitra Oil Jetties . In January 1957 she was relieved by , and returned to the UK via the Cape of Good Hope , as the Suez Canal was closed . She arrived back at Devonport in March to refit . In March 1958 , after anti - submarine training at Derry , she joined the Home Fleet for exercises and visits , and in June she returned to the Gulf . In October she joined other Royal Navy ships in the multi - national CENTO " Exercise Midlink " in the Indian Ocean , based at Karachi . In March 1959 she made East African coast visits and called at Tanga , Mtwara and Zanzibar before returning to Devonport in April . " Loch Insh " returned to the Gulf for two further tours of duty from December 1959 to October 1960 , and from May 1961 to June 1962 . Decommissioning and sale . Decommissioned on 22 June 1962 " Loch Insh " was laid up in Reserve . Placed on the Disposal List , she was sold to the Royal Malaysian Navy in 1963 . After a very extensive refit at Portsmouth , which included changes to the superstructure and the provision of helicopter landing facilities , on 2 October 1964 the ship was commissioned into the Royal Malaysian Navy and renamed KD " Hang Tuah " ( F433 ) . She sailed for Malaysia on 12 November 1964 , and served as the flagship of the Royal Malaysian Navy until 1971 , when she was used as a training ship until withdrawn from service six years later .