Full title reads: "RADAR".
Various shots of the radar locators operating by day - American operators. Various shots of the cartoons and diagrams explaining the working principal of radar. Several shots of WAAFS and radar operator at work in plotting room of an air H.Q. Girls at work.
Radar locating van at night, Antiaircraft guns firing at night. Enemy plane caught in searchlight beam. The blazing enemy plane crashing at night.
Diagrams of the radar operation at sea. Frontal shot of cruisers at sea. Close up shot of naval guns. Radar locators on cruisers. Naval guns firing at night.
American flying boat in flight. Diagrams explaining how, with help of radar, planes can find and bomb enemy target at any weather. Air shot of convoy at sea.
Very close shot of Flying Fortress in flight at night with engine ablaze. Close up shot of the pilot of blazing plane sending the help radar signal. Plane crashing in sea, very good close shots. Several shots of the crew showing their emotions. The crew tumbling from blazing plane into a dinghy. American Flying boat by night. Radar locators working at night.