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In page Canary Islands:

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Large ferry boats and fast ferries link most of the islands. Both types can transport large numbers of passengers, cargo, and vehicles. Fast ferries are made of aluminium and powered by modern and efficient diesel engines, while conventional ferries have a steel hull and are powered by heavy oil. Fast ferries travel in excess of 30 kn (56 km/h; 35 mph); conventional ferries travel in excess of 20 kn (37 km/h; 23 mph), but are slower than fast ferries.[citation needed] A typical ferry ride between La Palma and Tenerife may take up to eight hours or more while a fast ferry takes about two and a half hours and between Tenerife and Gran Canaria can be about one hour.[5]