The Prince Shoal Light Ship in the first half of the 20th century.
© Société d’histoire et de généalogie de Rivière-du-Loup, digital coll., F0056/1/459.
The Haut-fond Prince, a shoal at the mouth of the Saguenay, is one of the most difficult areas of the St. Lawrence River to navigate. The Prince Shoal Light Ship guided boats through this area from 1905 to 1964. After this, a real lighthouse, affectionately called “Toupie,” was built.