▁that ▁compared ▁to ▁previous ▁U - bo ats , ▁she ▁could ▁travel ▁further ▁af ield ▁for ▁longer , ▁with ▁a ▁payload ▁of ▁eleven ▁tor ped o es , ▁an ▁ ▁deck ▁gun ▁for ▁smaller ▁vessels ▁and ▁a ▁fla k ▁gun ▁for ▁use ▁against ▁aircraft . ▁U - 6 9 ▁was ▁very ▁successful , ▁s inking ▁over ▁ ▁of ▁Al lied ▁sh ipping ▁in ▁a ▁career ▁last ing ▁two ▁years , ▁making ▁her ▁one ▁of ▁the ▁longest ▁surv iving , ▁continu ously ▁serving , ▁U - bo ats . ▁Her ▁most ▁notable ▁attack ▁was ▁on ▁the ▁civil ian ▁fer ry ▁, ▁which ▁s ank ▁off ▁the ▁coast ▁of ▁New found land ▁in ▁October ▁ 1 9 4 2 , ▁killing ▁ 1 3 7 ▁men , ▁women ▁and ▁children . ▁She ▁was ▁ram med ▁and ▁s unk ▁by ▁ ▁on ▁ 1 7 ▁February ▁ 1 9 4 3 . ▁ ▁Design ▁and ▁construction ▁German ▁Type ▁VII C ▁sub mar ines ▁were ▁preced ed ▁by ▁the ▁shorter ▁Type ▁VII B ▁sub mar ines . ▁U - 6 9 ▁had ▁a ▁disp lacement ▁of ▁ ▁when ▁at ▁the ▁surface ▁and ▁ ▁while ▁sub mer ged . ▁She ▁had ▁a ▁total ▁length ▁of ▁, ▁a ▁pressure ▁h ull ▁length ▁of ▁, ▁a ▁beam ▁of ▁, ▁a ▁height ▁of ▁, ▁and ▁a ▁dra ug ht ▁of ▁. ▁While ▁on ▁the ▁surface ▁the ▁sub marine ▁was ▁power ed ▁by ▁two ▁Germania wer ft ▁F 4 6 ▁four - stroke , ▁six - cy l inder ▁super charg ed