Royal Huisman project 403, PHI, has departed from the shipyard’s newbuild facilities in Vollenhove...


Royal Huisman project 403, PHI, has departed from the shipyard’s newbuild facilities in Vollenhove...

…and is on her way to Royal Huisman Amsterdam to start sea trials.

The 58.5m / 192ft motoryacht PHI on her way to Royal Huisman Amsterdam


Developed and constructed below 500GT, PHI is by far the longest motoryacht in this category, based on current Classification rules. PHI is a magnificently sensuous motor yacht from the drawing board of Cor D. Rover, who has based the general concept, exterior design and interior layout on many in-depth conversations with the owner over a period of years. Relating inside and outside 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. The PHI philosophy and deck levels are subsequently focused on three themes: the galaxy, the ocean surface and the underwater world.

PHI’s (still mostly secret!) interior design and styling are defined by the London-based studio Lawson Robb. Her naval architecture is by Van Oossanen Naval Architects. Their specially developed Fast Displacement XL hull form allows this yacht to be long and sleek, yet still remain under the 500 GT mark. “Rather than just building a large yacht on a so-called shipyard ‘platform’ to enjoy the pleasures of being at sea, the owner of PHI wanted to build a yacht with a profound underlying story, a deep-rooted knowledge that runs through all aspects of the yacht, from her exterior appearance all the way to internal experience.”


“With such a powerful vision, a demand for the absolute highest level of quality available anywhere and such difficult engineering challenges, Royal Huisman were clearly the best partner to build the boat.”

Guy Booth –  Owner’s representative and project management

 “I am convinced that only a sailboat builder has the know-how and ambition to execute miracles on a square inch, and Royal Huisman is the epitome of this watchmakers skill.”

Cor D. Rover – PHI’s general concept, exterior design & interior layout

Read much more about PHI’s design philosophy in the press release dated 14 December 2020 “PHI: the world’s longest motoryacht below 500GT” at this website: News > Announcements [click here]

PHI is ready to shine

One of this year’s highlights was the launch of motoryacht PHI. Owner’s Representative Guy Booth commented: “All of us involved in the creation of PHI feel a sense of privilege to have had the opportunity to contribute to this innovative project. The co-operation between the owner’s team, the architects, the designers and everyone at Royal Huisman has been exceptional. We can be justifiably proud of what we have achieved.” Read more in the press release dated 22 July 2021 “PHI is ready to shine” at this website: News > Announcements [click here]

Complementing motoryacht PHI will be a 36m / 118ft shadow vessel, PHI Phantom, which is constructed at Alia Yachts. Carrying the same DNA as her bigger “beauty queen” sister, PHI Phantom is the hard working sibling. Both will have Cor D. Rover styling and a patented Van Oossanen Fast Displacement Hull, but her “make-up” will be a no-filler-matt-finish (albeit in the same color scheme as her big show-off sister).

“PHI would need to be a 90m project in order to deliver the same functions on board one yacht”

A report into the support vessel concept: “Are two boats better value than one?”

From The Superyacht Owner Report: “PHI Phantom has been built to carry a 12m / 39ft and 14m / 46ft tender, an 8m / 26ft sailing boat, six jet skis, a car and 60,000 litres of surplus fuel for the mothership, as well as bicycles, motorbikes, spare parts and a vast amount of storage and refrigeration.” Read much more in the article “Are two boats better value than one?” at this website: News > Inhuis [click here]