Type 21 frigate Ships Ships

| Pennant | Name_ | Hull_builder | Ordered | Laid_down | Launched | Accepted_into_service | Commissioned | Est_building_cost | Fate_ |
|---|---|---|---|---|---|---|---|---|---|
| F173 | Arrow | YSL | 11 November 1971 | 28 September 1972 | 5 February 1974 | 16 May 1975 | 29 July 1976 | £20.2M | To Pakistan as Khaibar |
| F171 | Active | Vosper Thornycroft | 11 May 1970 | 21 July 1971 | 23 November 1972 | 2 June 1977 | 17 June 1977 | £24.1M | To Pakistan as Shah Jahan |
| F174 | Alacrity | YSL | 11 November 1971 | 5 March 1973 | 18 September 1974 | 2 April 1977 | 2 July 1977 | £23.8M | To Pakistan as Badr |
| F184 | Ardent | YSL | 11 November 1971 | 26 February 1974 | 9 May 1975 | 10 September 1977 | 14 October 1977 | £26.3M | Bombed by Argentine A-4 Skyhawks on 21 May 1982 in San Carlos Water and sank following day in Grantham Sound |
| F185 | Avenger | YSL | 11 November 1971 | 30 October 1974 | 20 November 1975 | 15 April 1978 | 15 April 1978 | £27.7M | To Pakistan as Tippu Sultan |