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A similar technology is carbon-fibre composites. These are generally too expensive (and too light) for displacement boat hulls but are found widely today in aircraft and automotive parts like wing assemblies, monocoques and body panels where strength and light weight are important,<ref>DPS Composites, http://www.dpscomposites.com/</ref> or in super yachts like the aforementioned Juan K Super Maxi. The Maxi is a high-speed sail boat, not a displacement boat, so light weight is important.
== Steel ==
Steel hulls are made of plates of Lloyd’s approved marine quality steel. The steel is pre-primed at the steel mill. Plates are precision laser cut, using computerized design instructions called cutting files. Cutting files minimize wasted steel, and ensure a good fit. Deck plating is typically from 5/32-in to 1/4-in (4-6 mm), and hull plating is from 1/4-in to 5/16-in (6-8 mm) in thickness.
== References ==