3 0 1 s ▁power ▁was ▁produced ▁by ▁two ▁Germania wer ft ▁F 4 6 ▁six - cy l inder , ▁four - stroke ▁super charg ed ▁dies el ▁engines ▁producing ▁a ▁total ▁of ▁ ▁for ▁use ▁while ▁sur fac ed , ▁and two ▁Gar be , ▁L ah me yer ▁& ▁Co . ▁R P ▁ 1 3 7 / c ▁double - act ing ▁electric ▁mot ors ▁producing ▁ ▁total ▁for ▁use ▁while ▁sub mer ged . ▁The ▁sub marine ▁had ▁two ▁sh aft s ▁and ▁two ▁ ▁prop ellers . ▁U - 3 0 1 ▁could ▁sub merge ▁to ▁up ▁to ▁ ▁under water . ▁ ▁U - 3 0 1 ▁had ▁a ▁maximum ▁speed ▁of ▁ ▁while ▁sur fac ed ▁and ▁a ▁maximum ▁speed ▁of ▁ ▁when ▁sub mer ged . ▁The ▁sub marine ▁had ▁a ▁range ▁of ▁ ▁at ▁ ▁while ▁under water ; ▁on ▁the ▁surface , ▁she ▁could ▁travel ▁ ▁at ▁. ▁U - 3 0 1 ▁was ▁fitted ▁with ▁five ▁ ▁tor ped o ▁tub es ▁( four ▁in ▁the ▁bow ▁and ▁one ▁in ▁the ▁stern ), ▁four teen ▁tor ped o es ▁or ▁ 2 6 ▁T MA ▁mines , ▁one ▁ ▁SK ▁C / 3 5 ▁naval ▁gun ▁with ▁ 2 2 0 ▁r ounds , ▁and ▁a ▁ ▁C / 3 0 ▁anti - air craft ▁gun . ▁The ▁sub marine ▁had ▁a ▁complement ▁of ▁between ▁ 4 4 ▁and ▁ 6 0 ▁men . ▁ ▁Const ruction ▁and ▁career ▁Order ed