▁Sank ▁the ▁British ▁T - class ▁sub marine ▁HMS ▁Th ist le . ▁ ▁U - Bo at ▁Group ▁Five ▁Pat rol ▁Area : ▁East ▁of ▁the ▁Sh et land ▁Islands , ▁V ags f j ord , ▁Tr ond heim ▁▁ ▁U - 3 7 ▁- ▁a ▁Type ▁IX A , ▁one ▁of ▁the ▁few ▁boats ▁to ▁surv ive ▁to ▁be ▁sc utt led ▁near ▁the ▁war ' s ▁end . ▁During ▁Hart mut , ▁K . K apt . ▁Werner ▁Hart mann ▁s ank ▁three ▁fre igh ters . ▁▁ ▁U - 3 8 ▁- ▁a ▁Type ▁IX A ▁under ▁Heinrich ▁Lie be . ▁U - 3 8 ▁engaged ▁multiple ▁ships , ▁but ▁was ▁pl ag ued ▁with ▁prem ature ▁tor ped o ▁det on ations ▁and ▁miss es . ▁ ▁U - 4 7 ▁- ▁a ▁Type ▁VII B ▁under ▁Gün ther ▁Pri en ▁and ▁I W O ▁Hans - W erner ▁Kra us . ▁ ▁U - 4 8 ▁- ▁a ▁Type ▁VII B ▁under ▁Herbert ▁Sch ult ze ▁and ▁I W O ▁Rein hard ▁Su hren ▁- ▁both ▁who ▁ended ▁the ▁war ▁as ▁successful ▁U - Bo at ▁a ces , ▁but ▁had ▁no ▁success ▁on ▁this ▁pat rol . ▁ ▁U - 4 9 ▁- ▁a ▁Type ▁VII B ▁under ▁Kurt ▁von ▁G oss ler ▁was ▁s unk ▁on ▁ 1 5 ▁April ▁by ▁depth ▁charges ▁from ▁the ▁British ▁destroy ers ▁ ▁and ▁ ▁with ▁one ▁dead ▁and ▁ 4 1 ▁surv iv ors . ▁ ▁U