Turns out I was wrong, we do have videos from the Percé trip. They are a little rough, but they give you a feel for the waters around “le rocher Percé” and Bonaventure island.
Famed for its pierced rock, an ancient outcrop probably once linked to Bonaventure island, Percé is as far east as you can go on the south bank of the St-Lawrence river. It is not quite the Atlantic, it’s the gulf of St-Lawrence, but that did not stop u-boats from hunting in those waters during WW2.