Golden ratio

Royal Huisman’s latest superyacht project Phi emerges from the shipyard’s shed for the first time.

17 October 2019


The radical, fast displacement, sub-500GT superyacht has finally shown off her hull lines at Royal Huisman’s shipyard in Vollenhove, The Netherlands. The narrow and fuel-efficient hull was rolled out of her construction hall for the scheduled turning.

Four cranes performed the seamless manoeuvre placing Phi upright, after which she was rolled back inside to proceed with construction and outfitting.

Phi features exterior design from the drawing board of Cor D. Rover, interior design by Lawson Robb and naval architecture by Van Oossanen Naval Architects. Relating to the ”sectio divina” or the Golden Ratio, Phi is the formula that governs the continuation of dimensions and shapes in natural proportions throughout the design.

Phi was created as a result of many hours of deep conversation, over a period of years, between the experienced Owner and Cor D. Rover. Utilising the especially developed Fast Displacement XL hull form from Van Oossanen, allows this yacht to be 55-metres and still remain under the 500 GT mark.


Images taken on the day reveals a design of a completely bespoke exterior, which incorporate numerous technically innovative features.

The team working on Phi has been very aware that a major area of focus is the challenge to install comprehensive machinery and technical systems within the relatively low volume of a long, slender hull. A hull designed to meet high performance objectives which includes simplicity in operation and maintenance. Consequently, the Owner appointed Royal Huisman to call upon their technical expertise in this specific area.

Phi is scheduled for delivery in 2021 and once launched will be supported by a matching 36-metre shadow vessel, also designed by Cor D. Rover + Van Oossanen Naval Architects and currently under construction in Asia.


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