▁by ▁two ▁M AN ▁M ▁ 9 ▁V ▁ 4 0 / 4 6 ▁super charg ed ▁four - stroke , ▁nine - cy l inder ▁dies el ▁engines ▁producing ▁a ▁total ▁of ▁ ▁for ▁use ▁while ▁sur fac ed , ▁two ▁S iem ens - Sch uck ert ▁ 2 ▁G U ▁ 3 4 5 / 3 4 ▁double - 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 - 5 2 4 ▁was ▁fitted ▁with ▁six ▁ ▁tor ped o ▁tub es ▁( four ▁fitted ▁at ▁the ▁bow ▁and ▁two ▁at ▁the ▁stern ), ▁ 2 2 ▁tor ped o es , ▁one ▁ ▁SK ▁C / 3 2 ▁naval ▁gun , ▁ 1 8 0 ▁r ounds , ▁and ▁a ▁ ▁SK ▁C / 3 0 ▁as ▁well ▁as ▁a ▁ ▁C / 3 0 ▁anti - air craft ▁gun . ▁The ▁boat ▁had ▁a ▁complement ▁of ▁forty - e ight . ▁ ▁Service ▁history ▁▁ 1 st ▁pat rol ▁The ▁boat ▁depart ed ▁Mar v iken ▁( K rist ians