Royal Canadian Navy signal school: two HASs, LSs of ratings on parade ground. Cut to thousands of men racing across parade ground. Shots of Morse code class, of practice in Aldis lamp communication, in Morse key technique, and of instruction in radio fundamentals. Shot of sailors practicing semaphore communication from rocking stand. Sequence on Women's Division of the Navy marching in single file past the camera, practicing semaphore, Aldis lamp communication, etc. Cuts to LAS of women practicing from elevated stand and of message flags. LAS, MLS of large flag mast, men on cross spars, against cloudy background. Longer shot of mast. MCSs of women practicing Aldis lamp communication.