1963-1967 After commissioning and workup,
Penelope joined the
20th Frigate Squadron which was based at
Londonderry Port in
Northern Ireland, The ship transferred to the 2nd Frigate Squadron in September 1965. In 1966
Penelope underwent a refit into a trials ship with much of her weaponry and sensors removed or deactivated. The large Type 965 radar was removed, as was the ship's VDS gear and 40 mm guns, while the twin 4.5-in gun turret and fire-control system was
cocooned for preservation. She took part in a variety of trials, including tests of different designs of propellers and was refitted in 1970 in preparation for trials of hull noise which involved having her propellers removed and being towed by sister ship at the end of a long cable. She was also fitted with a prototype Type 184M sonar.
1968 In 1968,
Penelope assisted in the aftermath of the
Aer Lingus Flight 712 crash in the
Irish Sea. There have been a number of conspiracy theories about the crash, including the alleged involvement of
Penelope. The theory goes that the ship, while performing tests, mistook the aircraft for a target drone and shot her down. All conspiracy theories have been refuted by the
Ministry of Defence, while a 2002 report on the accident by an international study team noted that
Penelope was from the site of the accident, and was not fitted with surface to air missiles.
1969-1981 The following year,
Penelope was present in
West Germany during the
Kiel Week festival which combined a yachting race and festival events. In 1971, she underwent another refit to allow her to carry out trials on the
Sea Wolf missile. All existing armament was removed, and an experimental tracking system and then a Sea Wolf launcher were mounted on the ship's flight deck. The location of individual trials was dictated by the needs of the scientists conducting the trials. Sometimes live fire trials were conducted within a firing range off the Welsh coast. 4.5 inch shells fired from a ship several miles away would pass overhead and be targeted by Sea Wolf. Most trials however were conducted in harbour, tied up alongside, with the boilers shut down. These trials continued until December 1977, when she started another refit at
Devonport Dockyard to return her to an operational frigate and convert her to Batch 2 Exocet configuration.
Falklands War In 1982,
Penelope took part in the
Falklands War as part of the "
Bristol group", which included two other
Leander-class ships - and - she did not reach the
Falkland Islands area of operations until 26 May. Upon her arrival,
Penelope recovered air-dropped stores. Thereafter she escorted ships to and from the beachhead at San Carlos and Bluff Cove, including, in late May, the damaged which had suffered damage after being hit by cannon fire and bombs. On 13 June,
Penelopes
Lynx helicopter struck the already stranded Argentinian patrol boat
Rio Iguazu with a
Sea Skua missile.
Penelope also claimed to be the last ship attacked by Argentine aircraft over the course of the war. The Canadian vessel suffered $260,000 damage, while
Penelope suffered damage estimated in the millions. ==Ecuadorean Navy service, 1991–2008==