Air Raids Warning Centre (00/04/1943), (107 ft): shot of sign "Air Raid Warning Centre", in French and in English, small lights flashing (frame line problem). Shot of Command Post Centre man in helmet with throat mike, speaking in mike. Cut to arm band "Control Officer - Command Post Centre". LAS, MCS of face as he talks. (Frame line problem). HAS of very large table map of Saint Lawrence Valley, uniformed women moving markers on the map. Closer shots of same. (Frame line problem).