Delta Marine’s ‘Project Invader’...

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Delta Marine’s ‘Project Invader’...

Yard Updates

Her steel hull and deck recently were recently topped off by a composite superstructure.

JUNE 2012

Delta Marine's 65.5m (215ft) ‘Project Invader’ has an ice-strengthened steel hull with a maximum 13.1m (43ft) beam, but aluminium and composite superstructure. Her steel hull was recently transported from Delta’s satellite metal hull facility for final fit out at its main yard, which is located just five minutes from the private-jet centre at Boeing Field and 10 minutes by car from downtown Seattle, Washington. The move was a two-day affair. The 725-tonne hull was shipped by barge via the Duwamish waterway. Once at Delta, and tide permitting, the hull was rolled ashore and ready to receive the superstructure. Measuring 42m (139ft) long by 7m (21ft) high and weighing more than 62 tonnes (138,000lbs), the structure was lifted on using three 500-tonne cranes.
Not only is the size of this pre-outfit superstructure module remarkable, but so is method in which it was constructed. Utilizing finite element analysis and considerable experience, the Delta Design Group ‒ responsible for naval architecture, space planning and exterior styling ‒ engineered this project using combination of composite materials, steel and aluminium.
Owing to a particularly tight delivery schedule, Delta Marine designed the build sequence to take place both from the top down and the bottom up simultaneously. This allowed its composite crew to begin laminating the superstructure module while the steel yard was completing the hull.
Her interior design and decoration is the responsibility of Diane Johnson Design/Johnson, Wen, Mulder & Associates. The classic scheme majors on walnut burl and mahogany veneers, raised panelling, beamed overheads, and fluted columns.
Powered by twin Caterpillar 3516 diesels and carrying over 190,000L (50,000 US gals) of fuel, her effective range is around 5,000nm at 12 knots. The maximum speed is 16.8 knots.
The owner’s project management team is led by John Posgay of Even Keel.
She is being built to Lloyd’s classification and LY2.
Up to 50m (164ft) Delta Marine builds its motoryachts entirely out of composites, but has been building its biggest projects with steel hulls and GRP superstructures since its biggest project to date, the 73.2m (240ft) Laurel, launched in ‘05. Beyond 'Invader', it also has a similarly engineered 63m (207ft) explorer project under construction.
The operation presently delivers on average 1.5-2.5 yachts a year. Plus it does the odd refit project – for instance, it recently rebuilt a 70ft Delta-built explorer.
Delta Marine’s chief naval architect is Jay Miner.

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© Phil Draper