1 ▁sets . ▁ ▁The ▁Luft wa ffe ▁also ▁used ▁single - eng ined ▁aircraft ▁in ▁the ▁night - fig h ter ▁role , ▁starting ▁in ▁ 1 9 3 9 ▁with ▁the ▁Ar ado ▁Ar ▁ 6 8 ▁and ▁early ▁Mess ersch mitt ▁B f ▁ 1 0 9 ▁models , ▁which ▁they ▁later ▁referred ▁to ▁as ▁Wil de ▁Sau ▁( w ild ▁bo ar ). ▁In ▁this ▁case , ▁the ▁f igh ters , ▁typically ▁F ock e - W ulf ▁F w ▁ 1 9 0 s , ▁were ▁equ ipped ▁only ▁with ▁a ▁direction ▁find er ▁and ▁landing ▁lights ▁to ▁allow ▁them ▁to ▁return ▁to ▁base ▁at ▁night . ▁For ▁the ▁f ighter ▁to ▁find ▁their ▁targets , ▁other ▁aircraft , ▁which ▁were ▁gu ided ▁from ▁the ▁ground , ▁would ▁drop ▁strings ▁of ▁fl ares ▁in ▁front ▁of ▁the ▁bom bers . ▁In ▁other ▁cases , ▁the ▁burning ▁cities ▁below ▁provided ▁enough ▁light ▁to ▁see ▁their ▁targets . ▁ ▁Mess ersch mitt ▁B f ▁ 1 0 9 G ▁variants ▁had ▁G 6 N ▁and ▁similar ▁models ▁fitted ▁with ▁Fu G ▁ 3 5 0 ▁N ax os ▁" Z " ▁rad ar ▁rece ivers ▁for ▁hom ing ▁in ▁on ▁the ▁ 3 - g ig ah ert z ▁band ▁H 2 S ▁em issions ▁of ▁R AF ▁bom bers ▁— ▁the ▁April ▁ 1 9 4 4 ▁combat ▁debut ▁of ▁the ▁American - des igned ▁H 2 X ▁bomb - a im ing ▁rad ar , ▁operating ▁at