8 ▁fr ig ates ▁by ▁West ▁Germany ▁despite ▁their ▁dis similar ▁nature . ▁Oak ley ▁was ▁purchased ▁by ▁Germany ▁on ▁ 1 1 ▁November ▁ 1 9 5 7 , ▁and ▁ref itted ▁at ▁Har land ▁and ▁Wol ff ▁at ▁their ▁Liverpool ▁yard ▁before ▁being ▁taken ▁over ▁on ▁ 2 ▁October ▁ 1 9 5 8 . ▁She ▁was ▁re - comm ission ed ▁as ▁G ne isen au ▁( with ▁the ▁P enn ant ▁number ▁F 2 1 2 ) ▁at ▁Bre mer h aven ▁on ▁ 1 8 ▁October ▁ 1 9 5 8 , ▁serving ▁as ▁part ▁of ▁the ▁Naval ▁G unn ery ▁School ▁along ▁with ▁Sch arn host ▁( ex - ). ▁Early ▁changes ▁included ▁fitting ▁with ▁stabil is ers , ▁rad ar ▁and ▁a ▁cow l ▁fun nel , ▁with ▁close - in ▁anti - air craft ▁arm ament ▁changing ▁to ▁two ▁ 4 0 ▁mm ▁B of ors ▁guns . ▁G ne is ene au ▁was ▁further ▁modified ▁in ▁ 1 9 6 1 , ▁with ▁anti - sub marine ▁arm ament ▁being ▁removed ▁and ▁the ▁main ▁gun ▁arm ament ▁being ▁reduced ▁by ▁the ▁removal ▁of ▁a ▁ 4 - inch ▁mount . ▁ ▁From ▁ 2 8 ▁October ▁ 1 9 6 2 , ▁G ne isen au ▁under w ent ▁a ▁major ▁ref it ▁at ▁How ald t swer ke , ▁K iel , ▁with ▁a ▁more ▁modern ▁arm ament ▁and ▁sensor ▁out fit ▁being ▁added , ▁and ▁the ▁ship ' s ▁super structure ▁and