The Montreal-Lake Ontario Navigation System is a crucial waterway that connects the city of Montreal in Quebec to Lake Ontario in Ontario, Canada. This system includes a series of locks, canals, and channels that facilitate the movement of ships and cargo between the St. Lawrence River and the Great Lakes. It plays a vital role in trade and transportation, allowing larger vessels to navigate through the region. The navigation system consists of several key components, including the St. Lawrence Seaway, which was opened in 1959. This seaway enables ships to travel from the Atlantic Ocean to the interior of North America. The system is maintained by the St. Lawrence Seaway Management Corporation and is essential for economic activities, supporting industries and communities along its route.