Largest ships that can pass through the St. Lawrence Seaway
General characteristics
Tonnage
28,500 DWT
Length
740 ft (225.6 m)
Beam
78 ft (23.8 m)
Height
116.5 ft (35.5 m)
Draft
26.51 ft (8.1 m)
Comparison of bounding box of Seawaymax with some other ship sizes in isometric view.
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.[1]
CSL Laurentien, a Seawaymax-sized vessel
Seawaymax vessels are 225.55 metres (740.0 ft) in length, 23.80 metres (78.1 ft) wide, and have a draft of 8.08 metres (26.5 ft) and a height above the waterline of 35.5 metres (116.5 ft).[1] A number of lake freighters larger than this size cruise the Great Lakes and cannot pass through to the Atlantic Ocean. 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.[citation needed]
^ ab"Seaway Handbook". 2022. Retrieved 13 March 2023.
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...
categories include: Dry cargo Small Handy size, carriers of 20,000–28,000 DWT Seawaymax, 28,000 DWT the largest vessel that can traverse the St Lawrence Seaway...
Chinamax Handymax Handysize Maersk Triple E class Malaccamax Panamax Q-Max Seawaymax Suezmax Ultra Large Crude Carrier Valemax VLCC UNFAO defines a large fishing...
beam of 77.5 metres (254 ft). The similar terms Panamax, Malaccamax, and Seawaymax are used for the largest ships capable of fitting through the Panama Canal...
870 ft) long, with a minimum depth of 9.8 m (32 ft 2 in). It has a single Seawaymax lock to account for tidal differences; any vessel capable of transiting...
3 ft), and tonnage of 300,000 DWT. Similar terms Panamax, Suezmax and Seawaymax are used for the largest ships capable of fitting through the Panama Canal...
lakes. Most Great Lakes trade is of bulk material, and bulk freighters of Seawaymax-size or less can move throughout the entire lakes and out to the Atlantic...
considered separately. Categories occur in regional trade, such as Kamsarmax, Seawaymax, Setouchmax, Dunkirkmax, and Newcastlemax also appear in regional trade...
Canadian-flagged vessel on the Great Lakes in 25 years. Algoma Mariner is a Seawaymax vessel, designed to carry dry bulk through the Saint Lawrence Seaway and...
Panamax, Suezmax, Capesize List of Panamax ports Suezmax Q-Max Malaccamax Seawaymax "Vessel Requirements" (PDF). Panama Canal Authority. Archived from the...
1963 to 2013 under the flag of several shipping lines. She was built to seawaymax dimensions at the Collingwood Shipyards in Collingwood, Ontario for Canada...
Parkway for cyclists who wish to see the area in an alternative way. Seawaymax lake freighters often ply the Saint Lawrence Seaway. As is usual in inland...
primarily to transport iron ore and taconite pellets. Saltie – ocean-going, seawaymax vessels that access the Great Lakes through the Saint Lawrence Seaway...
facilities to be established. The Strait of Canso is completely navigable to Seawaymax vessels, and Port Hawkesbury is open to the deepest-draught vessels on...
MV Algonorth was a Seawaymax lake freighter built in 1970 and completed in 1971 by the Govan Division of Upper Clyde Shipbuilders Ltd. in Govan, Scotland...
facility. The dry dock is 747 feet (228 m) long and 98 feet (30 m) wide (Seawaymax capacity). There is usually 16 feet (4.9 m) of water over the sill of...
and was later scrapped in Aliağa, Turkey. Algolake was constructed to seawaymax dimensions. The bulk carrier is 222.5 metres (730.0 ft) long overall and...
was added, along with a bow thruster and the vessel was expanded to the seawaymax limitations. After the rebuild she was renamed Canadian Navigator. In...
vessel a new bow section, a new bow thruster and expanding the vessel to seawaymax dimensions. In 2003, the yard refitted the museum ship HMCS Haida. In...
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