Heesen joins 49.9-metre Project Grace hull and superstructure

Dutch Heesen Yachts has announced another milestone in the construction of the YN 21350, the 49.9-metre superyacht currently known as Project Grace
September 17 2025 4 minutes to read
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Heesen Project Grace

Project Grace is the first in the new 50-metre series of steel yachts with a fast displacement hull form (FDHF) 

According to the yard, joining the hull and superstructure became a culmination of almost a week-long operation. First, the steel hull was transported from Franeker in the northern part of the Netherlands, where Heesen’s partner for steel hulls is based, to the yard’s facility in Oss. Then, the yard’s engineering team installed the main engines, after which the hull and construction were joined. 

Heesen Project Grace transportation
Heesen Project Grace transportation

It's the first time Heesen has equipped a yacht with two MAN (IMO Tier III) engines of 882kW each, delivering a top speed of 15.5 knots and ensuring a range of up 3800 nautical miles at a speed of 12 knots.

“The new 50-metre Steel series gave us the opportunity to select the ideal engine for our brand-new platform. The MAN D2862LE438 was the clear choice, offering a power and efficiency profile that is perfectly calibrated for Project Grace's performance targets," said Peter van der Zanden, Head of the Design & Development / Engineering Department. 

Joining Project Grace hull and superstructure
Joining Project Grace hull and superstructure

The yacht’s exterior and interior were entrusted to British Harrison Eidsgaard studio. They tried translating the sporty aesthetic of aluminium yachts into steel form, retaining their elegance and bold shapes. 

Project Grace is neither radical nor extravagant, but elegant and timeless. Low bulwarks, sharp lines and vast expanses of glazing are all meant to ensure contact with the sea and a lot of natural light inside. 

For the interiors, Harrison Eidsgaard designers worked in close collaboration with the yard’s team, to make the layouts smart and ensure both the guests and the crew are in the optimal environments. As a result, common social areas are maximal and the crew can enjoy most comfortable work conditions. With a beam of 9.6 m, the yacht’s internal volume is 499 GT.

Project Grace design was entrusted to British Harrison Eidsgaard studio
Project Grace design was entrusted to British Harrison Eidsgaard studio

“Seeing the lines of this first 50-metre Steel yacht take shape is a powerful moment – it’s where the vision becomes a tangible reality. We are confident her iconic design will resonate strongly with a discerning owner,” commented Ruud van der Stroom, Heesen CCO.

There are six guest cabins, including the master suite on the main deck, as well as a VIP cabin and four double cabins below deck. There are also quarters for a crew of nine. 

There are various lounge areas aft and on the sundeck
There are various lounge areas aft and on the sundeck

At present, the shipyard keeps most of the details under wraps. All is currently known is that there is an infinity pool, exterior lounges on the sundeck, foredeck and aft, as well as bridge deck and main level saloons. Project Grace is currently offered for sale with a delivery scheduled for the first quarter of 2028, so the owner will still be capable of making some considerable individual changes to the project. 

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