0 . ▁Her ▁new ▁son ar ▁made ▁Caval la ▁valuable ▁for ▁experiment ation , ▁and ▁she ▁was ▁transferred ▁to ▁Sub marine ▁Development ▁Group ▁ 2 ▁on ▁ 1 ▁January ▁ 1 9 5 4 , ▁to ▁evaluate ▁new ▁weapons ▁and ▁equipment , ▁and ▁to ▁particip ate ▁in ▁fleet ▁exer cis es . ▁She ▁also ▁cru ised ▁to ▁European ▁waters ▁several ▁times ▁to ▁take ▁part ▁in ▁NAT O ▁exer cis es , ▁and ▁visited ▁Nor folk , ▁Va ., ▁for ▁the ▁International ▁Naval ▁Review ▁( 1 1 – 1 2 ▁June ▁ 1 9 5 7 ). ▁On ▁ 1 5 ▁August ▁ 1 9 5 9 , ▁her ▁classification ▁revert ed ▁to ▁SS - 2 4 4 . ▁ ▁In ▁November , ▁ 1 9 6 1 , ▁Caval la ▁was ▁ordered ▁to ▁Puerto ▁Rico ▁and ▁provided ▁elect rical ▁power ▁via ▁um bil ical ▁connection ▁to ▁ ▁which ▁had ▁suffered ▁a ▁dies el ▁generator ▁failure ▁while ▁the ▁nuclear ▁re actor ▁was ▁shut ▁down . ▁ ▁Caval la ▁successfully ▁assist ed ▁Th res her ''' s ▁restart ▁of ▁her ▁re actor . ▁Th res her ▁would ▁then ▁go ▁on ▁to ▁sink ▁two ▁years ▁later . ▁ ▁F ate C aval la ▁was ▁rec lass ified ▁an ▁" aux ili ary ▁sub marine ," ▁AG SS - 2 4 4 , ▁in ▁July ▁ 1 9 6 3 . ▁Caval la ▁was ▁de comm ission ed ▁and ▁struck ▁from ▁the ▁Naval ▁Register ▁on ▁ 3 0 ▁December ▁ 1 9 6 9 . ▁ ▁On