Canal boats could haul vastly larger loads than could turnpike transports.
A canal boat is a flat-bottomed craft used to transport cargo. Narrowboat, a specialised craft designed for use on England's, Scotland's, and Wales' narrow canals. Widebeam, a canal boat with a beam of 2.16 metres (7 ft 1 in) or more and built in the narrowboat style.
Authorities such as the Canal and River Trust, Scottish Canals, and the authoritative magazine Waterways World have adopted the single term "narrowboat" to refer to all boats built in the style and tradition of commercial boats that could fit through the narrow canal locks.
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