The Dutch superyacht sector witnessed a significant operational development this week as Damen Yachting initiated sea trials for its latest maritime behemoth. Known as Project Tanzanite, this 120-metre vessel has officially departed the shipyard’s facilities in Vlissingen to begin rigorous testing protocols in the North Sea. For the shipbuilding community and the Ultra High Net Worth market, this transition from the outfitting quay to open water represents a pivotal moment in the lifecycle of a custom superyacht.
The initiation of sea trials is the first time the vessel’s complex engineering systems are subjected to real-world operational loads. Following the yacht’s recent float-out within the dock at the Amels main shipyard, the technical teams have now shifted their focus to performance validation. This phase serves to verify the naval architecture, propulsion efficiency, and dynamic positioning capabilities of the 6,083 Gross Ton (GT) platform. The North Sea, known for its challenging conditions, provides an exacting environment for these crucial tests.
The Journey of a Full Custom Build
Project Tanzanite is an Amels Full Custom build, a classification that denotes a completely bespoke project engineered from the keel up to meet specific owner requirements. This stands in contrast to the shipyard’s Limited Editions range, which utilizes pre-engineered platforms. The scale of this project required a dual-location construction strategy. The steel hull was originally fabricated at Damen’s facility in Galati, Romania. It arrived in the Netherlands in June 2023 for the complex outfitting phase.
Since its arrival in Vlissingen, the vessel has undergone extensive structural and technical integration. The move to sea trials signals that the propulsion, power generation, and navigation systems have reached a state of operational readiness. Damen Yachting, responsible for the naval architecture, utilizes this phase to ensure that the theoretical calculations regarding stability and speed align with the physical reality of the vessel in motion.
Design Authority and Privacy
The exterior aesthetics of Project Tanzanite are the work of Espen Øino, a designer synonymous with the world’s largest and most capable superyachts. Øino’s studio is known for creating balanced, proportionate profiles that disguise the immense volume of gigayachts. While the specific exterior styling cues remain largely under wraps, the sheer size of the vessel suggests a design focused on long-range cruising capabilities and substantial onboard amenities.
Consistent with the high-level privacy requirements of the 100-metre-plus market segment, all details regarding the interior design remain confidential. The "Full Custom" nature of the project implies that the interior arrangement will be entirely unique. It is standard for projects of this magnitude to employ a separate, world-class interior design studio to curate the guest spaces, though the identity of this partner has not been disclosed. The interior volume of 6,083 GT provides a vast canvas for luxury accommodation, likely featuring expansive saloons, specialized wellness areas, and multi-deck owner suites.
Industrial Scale and Human Capital
The construction of a 120-metre superyacht is an industrial undertaking that impacts the wider maritime economy. Damen Yachting has indicated that the final phase of the build will involve a workforce of more than 1,000 people. This figure includes the shipyard's direct employees as well as a network of specialized co-makers and subcontractors.
Managing a workforce of this size requires precise logistical coordination. These craftsmen and women are responsible for the final layers of the build, including the installation of delicate interior joinery, the commissioning of audiovisual and IT networks, and the application of the final exterior paint system. The shipyard has scheduled the delivery of Project Tanzanite for 2026, meaning the team faces an intensive year of work following the conclusion of the current sea trials.
Project Oversight and Management
The complexity of Project Tanzanite necessitated the involvement of a dedicated external management team. Deeside Maritime has been responsible for overseeing the build and construction process for the past two years. In the superyacht industry, project managers act as the owner's technical representatives. They monitor the shipyard's progress, ensure adherence to the contractual specifications, and manage the financial aspects of the build.
Deeside Maritime will continue to play a central role through this final phase. Their presence during sea trials is critical, as they will validate the performance data against the owner's requirements. Any adjustments or refinements identified during the trials will be managed under their supervision before the yacht is accepted for final delivery.
Implications for the 2026 Market
The launch of Project Tanzanite reinforces the continued strength of the Dutch superyacht manufacturing sector. Damen Yachting’s ability to execute a Full Custom project of this magnitude alongside its portfolio of support vessels and explorer yachts highlights the facility's diverse industrial capacity.
As the vessel progresses through its sea trials, industry analysts will be monitoring its performance characteristics closely. The yacht represents one of the largest projects currently under construction in the Netherlands. Its eventual delivery in 2026 will add another significant entry to the global fleet of yachts exceeding 100 metres.
For now, the focus remains on the North Sea, where engineers and crew are putting the machinery through its paces. The successful completion of these trials will pave the way for the final outfitting sprint, bringing the vision of the owner and the design team closer to reality.
Stay tuned to NAVIS for further updates on Project Tanzanite as it approaches its delivery date.
