Airplane-to-airplane radio is demonstrated at North Island, Calif., when radiotelegraph messages are sent and receives a distance of about two miles between the airplanes of Lt. W.A. Robertson and A.D. Smith and Lt. H.A. Dargue and Capt. C.C. Culver.
Northrop Grumman recently delivered the first production-version of a new upgraded, jam-resistant airborne navigation system for the Air Force's F-22 Raptor and Navy’s E-2D Advanced Hawkeye aircraft.