CU of hull of freighter moving past camera as it enters lock. MS of gates closing behind freighter. LS of lake freighter moving in canal towards camera. HAS of bow of freighter as it enters flight lock at Thorold. LS of ship in canal as heavy railway tilt bridge goes down in foreground, locks visible in background. HAMS of hatches of lake freighter moving slowly past camera in canal. Shot of giant counterweight of lift bridge coming down behind network of beams and girders. HAMS of lift bridge coming down, lake freighter visible in background, Port Colborne entrance to Welland canal and Lake Erie in distance. Shot of bridge, traffic passing as freighter moves away in background. Front HAS of "Coverdale" moving in canal towards and underneath camera. Rear shot of ship moving away down canal. Two LSs of lake freighter on Great Lake. MLS of city, PAN across water to shore opposite city. LS of city. Three LSs of steaming freighters under way. BOATING MLS of lighthouse. Two MSs of freighter moving slowly by Ogilvie Flour Mill. Shots of stern of ore carrier during mooring operations. Several shots of ore unloaders in action. Shots of Soo Rapids, Algoma Steel Plant in Sault Sainte-Marie in distance. Shots of ships in canal at Port Colborne, at Thorold. BOATING SHOT of Great Lake waters, channel marker.