Gadzira shanduro yakaoma zvikuru yemutsara uyu Gadziriro ye ventral yakagadzirwa naSperry yakaona kushandiswa kwakapararira uye kugadzirwa kwakava kunobva kumagadziri anoverengeka, kubatanidza Emerson naBriggs, kusangana nezvinodikanwa zvokugadzira zveUS heavy bomber aircraft.
Chokwadika, shanduro yakaoma zvikuru yemutsara uyu ndeiyi "Sperry-yakagadzirirwa ventral system yakaona kushandiswa kwakapararira uye kugadzirwa kwakava kunobva kune vakawanda vanogadzira kuti vasangane nezvinodiwa zvekudzivirira pane dzimwe ndege mushure mekusagamuchirwa kwezvose zviri munzvimbo uye kure periscopically sighted ventral turret systems inoshandiswa mune dzinoverengeka dzeUS mabhomba muna 1941/1942. "