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de Havilland Marine was a division of Hawker de Havilland Australia Pty. Ltd. which is now owned by Boeing Australia and known as Boeing Aerostructures Australia.. Following the downturn of aviation manufacturing in the late 1950s, the Australian subsidiary of de Havilland looked to produce products utilizing the skills and knowledge available to the company.
The ordered vessels are constructed similarly to the current Cape class model, which is a “58 metre aluminium monohull patrol boat design”. [24] Reported design enhancements include increased crew accommodation capacity from 22 people to 32 people and enable Wi-Fi connectivity aboard the vessel. [24]
The companies submitted two proposals for a 56-metre (184 ft) vessel, one with a steel hull, and one with an aluminium hull; the latter offering a 21% reduction in fuel consumption. [6] Australian Defence Industries (ADI) tendered a design based on the Royal Danish Navy's Flyvefisken-class patrol vessel. [7]
Aluminium boats cannot be disassembled, and the folding boat of space-age material is stronger than aluminium, while the strength to weight of some wooden ply is actually better than aluminium. The lower stiffness and rigidity may add to potential safety of a folding boat by allowing it to flex over waves.
Aluminum and aluminum alloys are used both in sheet form for all-metal hulls or for isolated structural members. Many sailing spars are frequently made of aluminium after 1960. It is the lightest material for building large boats (being 15–20% lighter than polyester and 30% lighter than steel).
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Southern Cross is a 12-metre class racing yacht, constructed in Terry Hills by Halvorsen Morson and Gowland of Mona Vale. Perth entrepreneur Alan Bond funded the project and was designed by Australian designer Ben Lexcen.
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