▁over wh el med ; ▁with ▁only ▁one ▁or ▁two ▁search light s ▁or ▁rad ars ▁available ▁per ▁" cell ", ▁the ▁system ▁was ▁able ▁to ▁handle ▁perhaps ▁six ▁inter ception s ▁per ▁hour . ▁By ▁flying ▁all ▁of ▁the ▁bom bers ▁over ▁a ▁cell ▁in ▁a ▁short ▁period , ▁the ▁vast ▁majority ▁of ▁the ▁bom bers ▁fle w ▁right ▁over ▁them ▁without ▁ever ▁having ▁been ▁pl otted , ▁let ▁alone ▁attacked . ▁German ▁success ▁against ▁the ▁R AF ▁pl um met ed , ▁reaching ▁a ▁nad ir ▁on ▁ 3 0 / 3 1 ▁May ▁ 1 9 4 2 , ▁when ▁the ▁first ▁ 1 , 0 0 0 - b om ber ▁ra id ▁attacked ▁C ologne , ▁losing ▁only ▁four ▁aircraft ▁to ▁German ▁night ▁f igh ters . ▁ ▁In ▁ 1 9 4 2 , ▁the ▁Germ ans ▁first ▁started ▁deploy ing ▁the ▁initial ▁B / C ▁low ▁U H F - band ▁version ▁of ▁the ▁L ichten stein ▁rad ar , ▁and ▁in ▁extremely ▁limited ▁numbers , ▁using ▁a ▁ 3 2 - d ip ole ▁element ▁Mat rat ze ▁( mat tr ess ) ▁anten na ▁array . ▁This ▁late ▁date , ▁and ▁slow ▁introduction , ▁combined ▁with ▁the ▁capture ▁of ▁a ▁Ju ▁ 8 8 R - 1 ▁night ▁f ighter ▁equ ipped ▁with ▁it ▁in ▁April ▁ 1 9 4 3 ▁when ▁flow n ▁to ▁R AF ▁Dy ce , ▁Scotland , ▁by ▁a ▁defect ing ▁Luft wa ffe ▁crew , ▁allowed ▁British ▁radio