50m Thanuja on sea trials after two-year rebuild at Serenity Yachts

7 images

All images courtesy of Katharina Raczek Design

First look inside 50m superyacht Thanuja following two-year rebuild and extension

1 April 2025 • Written by Holly Margerrison and Dea Jusufi

The interiors of the 49.9-metre yacht Thanuja have been released for the first time since her two-year rebuild at Turkish yard Serenity Yachts. Originally built at Concept Marine and launched as Greyzone, Thanuja was redelivered to her owner in time for the 2024 Mediterranean charter season.

Construction of the vessel began in 2021 and what started out as a refit ended up as a full-blown rebuild. The yacht was gutted and stripped down to bare metal and extended by eight metres with an entirely new interior and exterior layout, resulting in an increase in volume from 380GT to 440GT. The interior was rethought and redesigned by German studio Katharina Raczek Design (KRD) and included both new guest and new crew areas. Thanuja can now accommodate up to 10 guests in five cabins with further space for a crew of seven.

The master suite is a highlight of the refit – and of "particular importance to the owner" – arranged with a seating area, bar and coffee station, library wall and large cosmetic vanity in the en suite. According to the German studio, the owner's taste resulted in a pared-back approach to the interior design. The living spaces are now defined by clean lines and a selection of "tactile, sensual materials", including deep mahogany fixtures, bronze sculptures and shell marble details.

Structural changes, in addition to the eight-metre extension, included a new aluminium superstructure and a new steel hull block, with design completed by German design and engineering firm iYacht. The shipyard installed new stainless steel hardware and handrails with the teak decking entirely replaced, while the technical spaces were also redone with a new engine room, new equipment and new bow and stern thrusters. Pipes, cabling, engines and generators were all included in the rebuild effort.

Udo A. Hafner, CEO of iYacht commented on the project: "Thanuja holds a special importance for our studio. During the last 12 months, we have successfully delivered a wide range of projects, ranging from electric outboards to 50-metre superyachts, from sailing monohulls to power catamarans."

He continued: "Thanuja initially began as a simple refit but quickly evolved into a major conversion. Leveraging the extensive expertise of our studio, we were able to support the owner and the yard in every phase. As the project complexity grew, it required us to bring in additional expertise from different disciplines. We are proud to have been an integral part of this project, from the initial concept, exterior design, naval architecture."

The project was commissioned by a German owner who oversaw the design and engineering process together with David White and Zucker & Partners.

Thanuja is powered by a pair of MAN Engines and CAT C4.4 generator. 

Sign up to BOAT Briefing email

Latest news, brokerage headlines and yacht exclusives, every weekday

By signing up for BOAT newsletters, you agree to ourTerms of Useand ourPrivacy Policy.

More about this yacht

Concept Marine   50 m •  2012

Similar yachts for sale

Concept Marine   36.2 m •  10 guests  €4,500,000

Sponsored listings