Tonnage
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Tonnage is a measure of the capacity of a ship, and is commonly used to assess fees on commercial shipping. The term derives from the taxation paid on tuns or casks of wine. In modern maritime usage,
Traditional English wine cask units
Watercraft
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A watercraft or waterborne vessel is any vehicle designed for travel across or through water bodies, such as a boat, ship, hovercraft, submersible or submarine.
A dinghy
A 17th-century sailing raft in Paita harbour (Peru).
A container ship in the Suez Canal
A Severn-class lifeboat in Poole Harbour, Dorset, England.