▁Area : ▁Lind es nes , ▁Eg ern s und ▁ ▁U - 2 ▁- ▁a ▁Type ▁II A ▁brought ▁to ▁front line ▁status ▁for ▁two ▁pat rol s ▁during ▁the ▁operation ▁before ▁returning ▁to ▁her ▁role ▁as ▁a ▁training ▁boat . ▁ ▁U - 3 ▁- ▁a ▁Type ▁II A ▁also ▁brought ▁into ▁front line ▁service ▁for ▁the ▁operation . ▁ ▁U - 5 ▁- ▁a ▁Type ▁II A ▁brought ▁into ▁front line ▁service ▁for ▁one ▁pat rol . ▁ ▁U - 6 ▁- ▁a ▁Type ▁II A ▁brought ▁into ▁front line ▁service ▁for ▁one ▁pat rol . ▁ ▁U - Bo at ▁Group ▁N ine ▁Pat rol ▁Area : ▁Ber gen , ▁Sh et land ▁Islands ; ▁SW ▁of ▁the ▁Norwegian ▁Coast . ▁ ▁U - 7 ▁- ▁a ▁Type ▁II B , ▁which ▁was ▁on ▁pat rol ▁west ▁of ▁the ▁Norwegian ▁Coast ▁when ▁D ön itz ▁first ▁received ▁orders ▁to ▁prepare ▁for ▁Hart mut . ▁U - 7 ▁conducted ▁three ▁pat rol s ▁during ▁March / A pril ▁ 1 9 4 0 . ▁ ▁U - 1 0 ▁- ▁a ▁Type ▁II B ▁that ▁s ank ▁a ▁Norwegian ▁vessel ▁in ▁February , ▁but ▁nothing ▁on ▁pat rol ▁during ▁Hart mut . ▁ ▁U - 1 9 ▁- ▁a ▁Type ▁II B ▁that ▁s ank ▁four ▁Dan ish ▁mer ch ants ▁on ▁ 1 9 ▁and ▁ 2 0 ▁March . ▁ ▁Un ass igned ▁These ▁U - bo ats ▁began ▁pat rol s ▁during ▁the ▁time frame ▁of ▁Operation