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The term Seawaymax refers to vessels which are the maximum size that can fit through the canal locks of the St. Lawrence Seaway, linking the inland Great Lakes of North America with the Atlantic Ocean.
Seawaymax vessels are in length, wide, and have a draft of and a height above the waterline of . A number of lake freighters larger than this size cruise the
Ship sizes
{{Ship measurements Ship types Saint Lawrence Seaway Ship measurements +
The term Seawaymax refers to vessels which are the maximum size that can fit through the canal locks of the St. Lawrence Seaway, linking the inland Great Lakes of North America with the Atlantic Ocean.
Seawaymax vessels are in length, wide, and have a draft of and a height above the waterline of . A number of lake freighters larger than this size cruise the Great Lakes
The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes in the mid-east region of North America that connect to the Atlantic Ocean via the Saint Lawrence River. There are five lakes ...
and cannot pass through to the Atlantic Ocean
The Atlantic Ocean is the second-largest of the world's five oceans, with an area of about . It covers approximately 20% of Earth's surface and about 29% of its water surface area. It is known to separate the " Old World" of Africa, Europe ...
. The size of the locks limits the size of the ships which can pass and so limits the size of the cargoes they can carry. The record tonnage for one vessel on the Seaway is 28,502 tons of iron ore while the record through the larger locks of the Great Lakes Waterway is 72,351 tons. Most new lake vessels, however, are constructed to the Seawaymax limit to enhance versatility by allowing the possibility of off-Lakes use.
See also
*Canso Canal
The Canso Canal is a short canal located in Nova Scotia, Canada.
Canal location
The Canso Canal is in the Strait of Canso, on the eastern side of the Canso Causeway, a rock-fill causeway which opened in 1955 to carry a 2-lane highway and a sing ...
, a Seawaymax passage in Nova Scotia
* SS ''Edmund Fitzgerald'', the first ship constructed close to Seawaymax size
* Cargo ship#Size categories
References
External links
Ship sizes
{{Ship measurements Ship types Saint Lawrence Seaway Ship measurements +