▁Pennsylvania , ▁in ▁an ▁incomplete ▁state ▁and ▁laid ▁up . ▁ ▁On ▁ 7 ▁December ▁ 1 9 6 7 , ▁the ▁contract ▁for ▁construction ▁of ▁P ogy ▁was ▁re ass igned ▁to ▁Ing alls ▁Sh ip building ▁Corporation ▁of ▁P asc ag ou la , ▁Mississippi , ▁and ▁the ▁incomplete ▁sub marine ▁was ▁to wed ▁to ▁that ▁ship yard ▁on ▁ 8 ▁January ▁ 1 9 6 8 ▁for ▁completion . ▁Seven ▁days ▁under way , ▁from ▁Philadelphia ▁to ▁P asc ag ou la ▁the ▁to w ▁line ▁broke ▁and ▁P ogy ▁was ▁ad rift . ▁ ▁P ogy ▁was ▁commission ed ▁on ▁ 1 5 ▁May ▁ 1 9 7 1 . ▁ ▁The ▁seven ▁year ▁time ▁span ▁from ▁ke el ▁lay ing ▁to ▁commission ing ▁was ▁the ▁longest ▁construction ▁time ▁in ▁history ▁for ▁an ▁American ▁sub marine . ▁ ▁This ▁record ▁was ▁exceed ed ▁by ▁USS ▁Se aw olf ▁( SSN - 2 1 ) ▁when ▁she ▁was ▁commission ed ▁in ▁July ▁of ▁ 1 9 9 7 . ▁ ▁Service ▁history ▁ ▁P ogy ▁put ▁to ▁sea ▁on ▁ 2 2 ▁April ▁ 1 9 7 5 ▁for ▁local ▁operations . ▁ ▁On ▁ 2 7 ▁April ▁ 1 9 7 5 , ▁about ▁ ▁off ▁the ▁coast ▁of ▁O ahu ▁in ▁the ▁Hawai ian ▁Islands , ▁her ▁look out ▁sight ed ▁a ▁caps ized ▁ 1 5 - foot ▁( 4 . 6 ▁meters ) ▁sail bo at ▁dr ifting ▁out ▁to ▁sea , ▁and ▁the ▁crew ▁quickly