Sequence showing cruise ship "Rapids King" navigating rapids on Saint Lawrence River, including HASs of rapids from ship's deck, passengers watching from railing. Shots of cruise ship entering canal lock, "Rapids Prince" moving by and past camera, passengers at railing. BOATING SHOTS alog shore of Saint Lawrence River, MLS of lock down canal. MS of captain at wheel of ship in cabin. HAS of passengers standing in bow of ship, watching rapids. MS of rapids in river. [titles interspersed]