MSs of Royal Canadian Air Force officer explaining map in briefing room, drawing "V" on blackboard. AERIAL LS over airport, snow on ground, airplane strut visible in foreground. MS of airmen leaving flight room in flying gear. CS of airman wearing parka, signalling skywards with asdic-type lamp. CS of man's feet, winter garb. CSs of airman in winter parka. Interior shot of four airmen putting on flying suits in dressing room. HAMLS of starboard side of ship at sea as seen from crow's nest. HAMS of two sailors wearing parkas, breaking ice along railing. MSs of six Royal Canadian Navy sailors greasing nose of torpedo on deck of ship.