▁World ▁War ▁II . ▁The ▁sub marine ▁was ▁laid ▁down ▁on ▁ 2 4 ▁December ▁ 1 9 4 1 ▁at ▁the ▁How ald t swer ke ▁yard ▁at ▁Hamburg , ▁launched ▁on ▁ 2 7 ▁February ▁ 1 9 4 3 , ▁and ▁commission ed ▁on ▁ 6 ▁April ▁ 1 9 4 3 ▁under ▁the ▁command ▁of ▁Ober le ut nant ▁zur ▁See ▁Ul f ▁La wa etz . ▁ ▁Att ached ▁to ▁ 5 th ▁U - bo at ▁Fl ot illa ▁based ▁at ▁K iel , ▁U - 6 7 2 ▁completed ▁her ▁training ▁period ▁on ▁ 3 0 ▁September ▁ 1 9 4 3 ▁and ▁was ▁assigned ▁to ▁front - line ▁service . ▁ ▁Design ▁German ▁Type ▁VII C ▁sub mar ines ▁were ▁preced ed ▁by ▁the ▁shorter ▁Type ▁VII B ▁sub mar ines . ▁U - 6 7 2 ▁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 ▁. ▁The ▁sub marine ▁was ▁power ed ▁by ▁two ▁Germania wer ft ▁F 4 6 ▁four - stroke , ▁six - cy l inder ▁super charg ed ▁dies el ▁engines ▁producing ▁a ▁total ▁of ▁ ▁for ▁use ▁while ▁sur fac ed , ▁two ▁S iem ens - Sch uck ert ▁G U ▁ 3 4 3 / 3 8 – 8 ▁double -