H2S ya gudanar da gwajin farko a ranar 23 ga Afrilu, 1942, tare da radar da aka saka a cikin Halifax bom,'' V9977 '.
Tabbas, mafi rikitarwa na jumla ita ce "H2S ya gudanar da gwajin gwajinsa na farko a ranar 23 ga Afrilu, 1942, tare da radar da aka sanya a cikin jirgin saman Halifax, an shigar da na'urar bincike a cikin ciki na jirgin sama ta amfani da matsayin da aka yi a baya ta tsakiyar hasumiya, wanda a wancan lokacin ba a taɓa shigar da shi ba. "