Aluminium marine alloys were developed and today about 50 per cent of outboard motors are made of aluminium. Fast ferries, with speeds of 35-50 knots, are revolutionising transport over short sea routes. These structures are weight-critical, and aluminium is the preferred material. A modern ferry can use up to 400 tonnes of aluminium. Users report that aluminium craft have been in service for over 30 years with no signs of metal fatigue.
Low maintenance is also a significant feature of aluminium vessels.
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