Various MSs of the Saint-Lambert lock, freighter moving through and up the Saint Lawrence Seaway, lift bridge descending, the Victoria Bridge and Montreal are visible in the background. Various shots of ship moving through lock, ZOOM INS and ZOOM OUTS. Shots, with jump cut, of lock gate closing, water boiling up from below. LAS of superstructure of ship moving past camera and lift bridge. Shot of stern and propellor wash. MLS of gates closing, PAN to freighter in lock. Shot of lift bridge rising, ship's screw churning water as ship prepares to move out. LAMLS of train speeding over lowered lift bridge. Shots of water rising over barrier across lock, of lock gates opening, barrier rising out of water, of freighter's bow moving past camera. Shots of stern moving past, of propellor wash.