Canal de Saint-Marc (18°55'N., 72°50'W.), entered between Pointe de Saint-Marc and Ile de la Gonave’s N side, is a sparsely surveyed, rather deep water passage, having on its steep-to insular mainland side, for a distance of 17 miles to Pointe du Trou Forban, a rugged and mountainous terrain that rises rapidly close inland. The SE portion of the passage shelves rapidly between Pointe du Trou Forban and Ile de la Gonave SE extremity, where above and below-water dangers extending well into the passage from each point, considerably narrows its navigable width. Currents through the passage reportedly set NW.

Location