LASs of royal yacht "Britannia" moving into lock, short PAN to Union Jack flag on forward jackstaff. Rear MCSs of New York State Trooper, "Britannia" superstructure in background. Various shots of the "Britannia" sailing up Saint Lawrence River, up seaway, up canals, into locks and out. Several MSs of upper decks of yacht sailing into locks. Shot of bow and waterline of slowly moving ship, PAN to hull, to side of lock, to people watching. HALS of "Britannia" and escort in Thousand Island section of river.