33 CFR §161.45

1. (a)The VTS area consists of the navigable waters of the St. Marys River and lower Whitefish Bay from 45°57′ N. (De Tour Reef Light) to the south, to 46°38.7′ N. (Ile Parisienne Light) to the north, except the waters of the St. Marys Falls Canal, and to the east along a line from La Pointe to Sims Point, within Potagannissing Bay and Worsley Bay.
2. (b)Reporting Points.