▁dies el ▁engines ▁producing ▁a ▁total ▁of ▁; ▁while ▁two ▁A EG ▁G U ▁ 4 6 0 / 8 – 2 7 ▁double - act ing ▁electric ▁mot ors ▁producing ▁a ▁total ▁of ▁ ▁were ▁use ▁when ▁the ▁sub marine ▁was ▁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 9 ▁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 ▁one ▁ ▁C / 3 0 ▁anti - air craft ▁gun . ▁The ▁boat ▁had ▁a ▁complement ▁of ▁between ▁forty - four ▁and ▁si xty ▁sail ors . ▁ ▁She ▁was ▁built ▁at ▁the ▁Germania wer ft ▁in ▁K iel ▁during ▁ 1 9 4 0 , ▁and ▁was ▁ready ▁for ▁service ▁in ▁November . ▁After ▁her ▁warm ▁up ▁in ▁the ▁Balt ic ▁Sea ▁( des igned ▁to ▁give ▁her ▁an ▁opportunity ▁to ▁train ▁and ▁repair ▁minor ▁fault s ), ▁she ▁was ▁deployed ▁into ▁the ▁Atlantic ▁Ocean