HMS Diomede ( F16 ) HMS " Diomede " ( F16 ) was a " Leander " - class frigate of the Royal Navy ( RN ) . She was built by Yarrow Shipbuilders in Glasgow . " Diomede " was launched on 15 April 1969 and commissioned on 2 April 1971 . Her nickname was " Dimweed " . Royal Navy Service . In 1972 , " Diomede " took part in the Second Cod War during the fishing dispute with Iceland , though thankfully " Diomede ' s " involvement was more quiet than her involvement in the subsequent Cod War . Also that year , " Diomede " joined the 3rd Frigate Squadron which was then based in the Far East . In 1974 , " Diomede " , took part in Task Group ( TG ) 317 . 2 which was a deployment that caused some controversy back in the UK when the TG , on its way to the Far East / Pacific , visited South Africa , which was at that time under apartheid rule , as well as performing military exercises with the South African armed forces . " Diomede " , along with the nuclear submarine " Warspite " , visited the port of Simonstown while the rest of the TG visited Cape Town . The TG , upon reaching the Far East performed a number of exercises and ' fly the flag ' visits with Far East and Pacific countries . They did not visit South Africa on their return , and headed to Brazil for an exercise with the Brazilian Navy . " Diomede " returned to the UK in June 1975 . The following year , " Diomede " joined the Fishery Protection Squadron , and took part in the Third Cod War . During that ' war ' in February , " Diomede " was rammed by the Icelandic gunboat " Baldur " , which performed a number of similar incidents to many ships during the Cod Wars . The following month , " Diomede " was involved in a similar incident with the same gunboat and just three days after that incident was again rammed by another gunboat , the " Tyr " , equally notorious to the RN during the Cod Wars . Astonishingly , later that month , " Diomede " was rammed once again by " Baldur " . In 1977 , " Diomede " took part in the Fleet Review , in honor of Queen Elizabeth II ' s Silver Jubilee as part of the 3rd Frigate Squadron . Also in the 1970s , " Diomede " was one of the seven Leanders used as the fictional " HMS " Hero " " for the BBC TV drama series " Warship " . All members of the crew were given " Hero " cap tallies for filming purposes . Her modernisation that would have given her Exocet and Sea Wolf was cancelled due to John Nott ' s 1981 Defence Review and she was intended to be placed in the Standby Squadron but the decision was repealed due to the 1982 Falklands War . During that year , " Diomede " was deployed to the Persian Gulf on patrol . " Diomede " returned to the South Atlantic in 1985 where she performed a number of patrols in the vicinity of the Falkland Islands as well as visiting the Island of South Georgia . In 1986 she deployed again to the West Indies as the ' West Indies Guardship ' accompanying HM Queen Elizabeth II aboard HMY " Britannia " . The Queen was so impressed by the way her ships company performed their duties , that she ordered ' splice the mainbrace ' . Pakistan Navy Service . In 1988 , " Diomede " was decommissioned from the Royal Navy and subsequently sold to Pakistan where she was renamed " PNS Shamsheer " . PNS Shamsheer continued in service for many years until she was decommissioned by Pakistan Navy and scrapped . References . Commander William Lawrence Tosco Pepe was captain of HMS Diomede 1980 - 1982