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Ship canal
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A ship canal is a canal especially constructed to carry ocean-going ships, as opposed to barges. Ship canals can be enlarged barge canals, canalised or channelized rivers, or canals especially constructed from the start to accommodate ships.
For a canal to qualify as a ship canal, it must have a minimum depth of at least 5 metres (16.4 feet), although many are much deeper.

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Encyclopedia
A ship canal is a canal especially constructed to carry ocean-going ships, as opposed to barges. Ship canals can be enlarged barge canals, canalised or channelized rivers, or canals especially constructed from the start to accommodate ships.
For a canal to qualify as a ship canal, it must have a minimum depth of at least 5 metres (16.4 feet), although many are much deeper. The purpose of a ship canal is:
- To create a shortcut and avoid lengthy detours.
- To create a navigable shipping link between two land-locked seas or lakes.
- To provide inland cities with a direct shipping link to the sea.
- To provide an economical alternative to other options.
Important ship canals (by length)
Navigability
The standard used in the European Union for classifying the navigability of inland waterways is the European Agreement on Main Inland Waterways of International Importance (AGN) of 1996, adopted by The Inland Transport Committee of the United Nations Economic Commission for Europe (ECE), which defines the following classes: (This table is incomplete.)
| Class | Tonnage (t) | Draught (m) | Length (m) | Width (m) | Air Draught (m) | Description |
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| Class III | 1,000 | | | | | | | Class IV | 1,000–1,500 | 2.5 | 80–85 | 9.5 | 5.2–7.0 | Johann Welker | | Class Va | 1,500–3,000 | 2.5–2.8 | 95–110 | 11.4 | 5.2–7.0–9.1 | Large Rhine | | Class VIb | 6,400–12,000 | 3.9 | 140 | 15 | 9.1 | | | Class VII | 14,500–27,000 | 2.5–4.5 | 275–285 | 33.0–34.2 | 9.1 | |
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