▁at ▁low ▁alt itude , ▁but ▁trav elling ▁for ▁most ▁of ▁the ▁journey ▁at ▁. ▁At ▁ 2 0 : 5 8 ▁he ▁changed ▁his ▁heading ▁to ▁ 2 4 5 ▁degrees , ▁int ending ▁to ▁approach ▁the ▁coast ▁of ▁North ▁East ▁England ▁near ▁the ▁town ▁of ▁B amb urg h , ▁North umber land . ▁As ▁it ▁was ▁not ▁yet ▁sun set ▁when ▁he ▁initially ▁approached ▁the ▁coast , ▁H ess ▁back track ed , ▁z ig z ag ging ▁back ▁and ▁forth ▁for ▁ 4 0 ▁minutes ▁until ▁it ▁grew ▁dark . ▁Ar ound ▁this ▁time ▁his ▁auxili ary ▁fuel ▁t anks ▁were ▁exha usted , ▁so ▁he ▁released ▁them ▁into ▁the ▁sea . ▁Also ▁around ▁this ▁time , ▁at ▁ 2 2 : 0 8 , ▁the ▁British ▁Ch ain ▁Home ▁station ▁at ▁Ot ter c ops ▁M oss ▁near ▁New castle ▁upon ▁Ty ne ▁detected ▁his ▁presence ▁and ▁passed ▁along ▁this ▁information ▁to ▁the ▁Filter ▁Room ▁at ▁Bent ley ▁Pri ory . ▁So on ▁he ▁had ▁been ▁detected ▁by ▁several ▁other ▁stations , ▁and ▁the ▁aircraft ▁was ▁designated ▁as ▁" R a id ▁ 4 2 ". ▁ ▁Two ▁Sp it f ires ▁of ▁No . ▁ 7 2 ▁Squadron ▁R AF , ▁No . ▁ 1 3 ▁Group ▁R AF ▁that ▁were ▁already ▁in ▁the ▁air ▁were ▁sent ▁to ▁attempt ▁an ▁inter ception , ▁but ▁failed ▁to ▁find ▁the ▁intr uder . ▁A ▁third ▁Sp it fire ▁sent ▁from ▁A ck ling ton ▁at ▁ 2 2 :