<P> Inland canals have often had boats specifically built for them . An example of this is the British narrowboat, which is up to 72 feet (21.95 m) long and 7 feet (2.13 m) wide and was primarily built for British Midland canals . In this case the limiting factor was the size of the locks . This is also the limiting factor on the Panama canal where Panamax ships were limited to a length of 289.56 m (950 ft) and a beam of 32.31 m (106 ft) until 26 June 2016 when the opening of larger locks allowed for the passage of larger New Panamax ships . For the lockless Suez Canal the limiting factor for Suezmax ships is generally draft, which is limited to 16 m (52.5 ft). At the other end of the scale, tub - boat canals such as the Bude Canal were limited to boats of under 10 tons for much of their length due to the capacity of their inclined planes or boat lifts . Most canals have a limit on height imposed either by bridges or by tunnels . </P> <Ul> <Li> Europe <Ul> <Li> Canals of France </Li> <Li> Canals of Amsterdam </Li> <Li> Canals of Germany </Li> <Li> Canals of Ireland </Li> <Li> Canals of Russia </Li> <Li> Canals of the United Kingdom </Li> <Li> Great Bačka Canal (Serbia) </Li> </Ul> </Li> <Li> North America <Ul> <Li> Canals of Canada </Li> <Li> Canals of the United States </Li> </Ul> </Li> </Ul> <Li> Europe <Ul> <Li> Canals of France </Li> <Li> Canals of Amsterdam </Li> <Li> Canals of Germany </Li> <Li> Canals of Ireland </Li> <Li> Canals of Russia </Li> <Li> Canals of the United Kingdom </Li> <Li> Great Bačka Canal (Serbia) </Li> </Ul> </Li> <Ul> <Li> Canals of France </Li> <Li> Canals of Amsterdam </Li> <Li> Canals of Germany </Li> <Li> Canals of Ireland </Li> <Li> Canals of Russia </Li> <Li> Canals of the United Kingdom </Li> <Li> Great Bačka Canal (Serbia) </Li> </Ul>

What is the main difference between a river and a canal