ber ▁stream ▁and ▁the ▁introduction ▁of ▁Window ▁pract ically ▁made ▁the ▁previous ▁H imm el b ett ▁procedure ▁ob sole te . ▁This ▁was ▁also ▁evident ▁to ▁the ▁German ▁high ▁command . ▁To ▁counter ▁these ▁British ▁measures ▁two ▁new ▁strateg ies ▁were ▁purs ued , ▁Wil de ▁Sau ▁( W ild ▁Bo ar ) ▁and ▁Z ah me ▁Sau ▁( T ame ▁Bo ar ). ▁Wil de ▁Sau , ▁conce ived ▁by ▁Hans - Jo achim ▁Her rm ann , ▁was ▁a ▁technique ▁by ▁which ▁the ▁R AF ▁bom bers ▁were ▁mainly ▁engaged ▁by ▁single - se at ▁f ighter ▁plan es , ▁ill umin ated ▁by ▁search light s , ▁over ▁the ▁target ▁area . ▁The ▁Z ah me ▁Sau ▁procedure , ▁proposed ▁by ▁Vik tor ▁von ▁Lo ß berg , ▁called ▁for ▁a ▁night ▁f ighter ▁to ▁in fil tr ate ▁the ▁bom ber ▁stream . ▁The ▁position , ▁alt itude , ▁and ▁general ▁direction ▁was ▁then ▁broadcast . ▁The ▁information ▁was ▁received ▁by ▁other ▁night ▁f igh ters , ▁who ▁navig ated ▁to ▁the ▁bom ber ▁stream ▁by ▁themselves . ▁In ▁Z ah me ▁Sau , ▁the ▁German ▁night ▁f igh ters ▁were ▁track ed ▁and ▁radio - control led ▁by ▁means ▁of ▁Y - Ver fahren ▁( Y - Control ). ▁Sch n au fer ▁did ▁not ▁make ▁any ▁claims ▁during ▁Operation ▁G om or rah . ▁Their ▁next ▁success ▁came ▁when ▁he ▁and ▁Fre ym ann ▁shot ▁down ▁a ▁Lanc aster ▁on ▁ 1 0 / 1 1