HMS Rhyl (F129)
HMS "Rhyl" was a "Rothesay"-class or Type 12I anti-submarine frigate of the Royal Navy, launched by Lady Macmillan on 23 February 1959 and commissioned in October 1960. Following Royal Navy service she was sunk as a target in 1985. Design. The "Rothesay" class was an improved version of the anti-submarine frigate, with nine "Rothesay"s ordered in the 1954–1955 shipbuilding programme for the Royal Navy to supplement the six "Whitby"s. "Rhyl" was long overall and between perpendiculars, with a beam of and a draught of . The "Rothesay"s were powered by the same Y-100 machinery used by  the "Whitby" class. Two Babcock & Wilcox water-tube boilers fed steam at and to two sets of geared steam turbines which drove two propeller shafts, fitted with large ( diameter) slow-turning propellers. The machinery was rated at , giving a speed of . Crew was about 212 officers and ratings. A twin 4.5-inch (113 mm) Mark 6 gun mount was fitted forward, with 350 rounds of ammunition carried. It was originally intended to fit a twin 40 mm L/70 Bofors anti-aircraft mount aft, but in 1957 it was decided to fit the Seacat anti-aircraft missile instead. Seacat was not  yet ready, and "Rhyl" was completed with a single L/60 Bofors 40 mm mount aft as a temporary anti-aircraft armament. The design anti-submarine armament consisted of twelve 21-inch torpedo-tubes (eight fixed and two twin rotating mounts) for Mark 20E Bidder homing anti-submarine torpedoes, backed up by two Limbo anti-submarine mortars fitted aft. The Bidder homing torpedoes proved unsuccessful, being too slow to catch modern submarines and the torpedo tubes were removed. The ship was fitted with a Type 293Q surface/air search radar on the foremast, with a Type 277 height-finding radar on  a short mast forward of the foremast. A Mark 6M fire control system (including a Type 275 radar) for the 4.5 inch guns was mounted above the ship's bridge, while a Type 974 navigation radar was also fitted. The ship's sonar fit consisted of Type 174 search, Type 170 fire control sonar for Limbo and a Type 162 sonar for classifying targets on the sea floor. Construction. "Rhyl" was laid down at Portsmouth Dockyard on 29 January 1958. She was launched by Lady Dorothy Macmillan, wife of the-then Prime Minister, Harold Macmillan on 23 April 1959 , and completed on 31 October 1960. Operational service. Following commissioning in 1960 "Rhyl" served in the Far East, Mediterranean and East Africa, including being diverted to stand-by off Goa following the Indian invasion in 1961. She was the 23rd Frigate Squadron leader by the time she attended Portsmouth Navy Days in 1965. Between 1964 and 1966 she was commanded by J A Templeton-Cotill who subsequently attained flag rank. On 12 January 1964, the Zanzibar Revolution overthrew the rule of Jamshid bin Abdullah, the Sultan of Zanzibar. As a response, "Rhyl" embarked a company of soldiers from 1st Battalion , the Staffordshire Regiment, and, together with the survey ship and the stores ship , evacuated British civilians from Zanzibar. Later that month, the Tanganyikan Army mutinied, and the British intervened on the side of the Tanganyikan government, with "Rhyl" supporting landings of Royal Marines from the aircraft carrier . She served, along with HMS "Ark Royal" and HMS "Lowestoft", on the first Beira Patrol, and then in 1966–7 served in the Mediterranean as Captain D 23rd Escort Squadron with squadron elements HMS "Lowestoft" (half leader), HMS "Dainty" and HMS "Defender". HMS "Rhyl" returned to UK waters in 1967, eventually decommissioning in Plymouth  to undergo a major refit and upgrade to a "Leander"-like specification. In April 1982, "Rhyl" was ordered south for Operation Corporate, but mechanical failure prevented the deployment, so she acted as Ascension Island guardship until July 1982. HMS "Rhyl" deployed to the United States and West Indies in the first few months of 1983, returning to Portsmouth in April 1983 where she was expected to take her place in the Orient Express deployment led by HMS "Invincible" later that year. However whilst in dry dock, it was discovered that her hull was compromised and the decision was made to pay  her off.