#seaway__sea_lane__sealane__ship_route__trade_route__traderoute  a lane at sea that is a regularly used route for vessels
  supertype:  #lane  a well-defined track or path; for e.g. swimmers or lines of traffic
  subtype:  #Saint_Lawrence_Seaway__St._Lawrence_Seaway  a seaway involving the Saint Lawrence River and the Great Lakes that was developed jointly by Canada and the United States; oceangoing ships can travel as far west as Lake Superior

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