inland waterways

A major part of all the world's shipping moves on inland waterways—rivers, canals, and lakes. Usually such shipping employs smaller, lighter vessels, although in some cases oceangoing ships navigate inland waterways, for example, the St. Lawrence Seaway route to the Great Lakes of North America. Containerization, lighter-aboard-ship, and barge-aboard-ship operations have facilitated the shipping of cargoes between oceangoing vessels and those of the inland waterways.