act ing ▁electric ▁mot ors ▁producing ▁a ▁total ▁of ▁ ▁for ▁use ▁while ▁sub mer ged . ▁She ▁had ▁two ▁sh aft s ▁and ▁two ▁ ▁prop ellers . ▁The ▁boat ▁was ▁capable ▁of ▁operating ▁at ▁depth s ▁of ▁up ▁to ▁. ▁ ▁The ▁sub marine ▁had ▁a ▁maximum ▁surface ▁speed ▁of ▁ ▁and ▁a ▁maximum ▁sub mer ged ▁speed ▁of ▁. ▁When ▁sub mer ged , ▁the ▁boat ▁could ▁operate ▁for ▁ ▁at ▁; ▁when ▁sur fac ed , ▁she ▁could ▁travel ▁ ▁at ▁. ▁U - 6 7 2 ▁was ▁fitted ▁with ▁five ▁ ▁tor ped o ▁tub es ▁( four ▁fitted ▁at ▁the ▁bow ▁and ▁one ▁at ▁the ▁stern ), ▁four teen ▁tor ped o es , ▁one ▁ ▁SK ▁C / 3 5 ▁naval ▁gun , ▁ 2 2 0 ▁r ounds , ▁and ▁two ▁tw in ▁ ▁C / 3 0 ▁anti - air craft ▁guns . ▁The ▁boat ▁had ▁a ▁complement ▁of ▁between ▁forty - four ▁and ▁si xty . ▁ ▁Service ▁history ▁ ▁On ▁the ▁fourth ▁and ▁final ▁war ▁pat rol , ▁U - 6 7 2 ▁was ▁attacked ▁by ▁the ▁British ▁fr ig ate ▁ ▁north ▁of ▁Gu ern sey ▁and ▁heavily ▁dam aged ▁on ▁ 1 8 ▁July ▁ 1 9 4 4 . ▁For ced ▁to ▁surface , ▁the ▁crew ▁abandoned ▁ship ▁and ▁sc utt led ▁the ▁U - bo at . ▁All ▁ 5 2 ▁crew ▁members ▁surv ived ▁and ▁were ▁picked ▁up ▁the ▁next ▁day ▁by ▁British ▁life - bo ats