 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..

"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.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.