Inside Deep Blue: Lürssen’s 134m Superyacht Build

Lürssen’s 134m Diesel-Electric Superyacht Deep Blue Launched Quietly

In June 2025, Deep Blue slipped into the water at Lürssen’s Bremen facility with no public statement and no grand reveal.

At 134.2 metres, she’s now one of the largest superyachts in the world, and one of the most significant global launches of the year. This project was kept highly secretive during its build – construction began in 2021 under wraps. The vessel first emerged as a hull in July 2023 before final assembly and outfitting. The official launch at Lürssen’s Vegesack facility in Bremen drew widespread attention

The most remarkable thing?
Almost nothing has been shared.

**134m Superyacht Specs: What We Know About Deep Blue So Far:**

Builder: Lürssen
Design: Espen Øino (unconfirmed), Zuretti (interior, unconfirmed)
Length: 134.2 m
Beam: 19.8 m
Gross tonnage: 9,000 GT
Propulsion: 8 MTU gensets powering 4 electric motors (diesel-electric)
Drive: Twin azimuth thrusters
Launched: Bremen, June 2025
Delivery: Expected Q4 2025

Lürssen remains one of the most recognised names in high-end yacht building, combining deep technical expertise with decades of experience. The launch of Deep Blue was timed to coincide exactly with Lürssen’s 150th anniversary, a testament to the yard’s enduring legacy.

They’re not only known for their launches. They’re also among the most established yacht refit companies in the world, trusted with some of the industry’s most complex overhaul projects.

Diesel-Electric Power: Built for Silence and Range

Deep Blue runs on a diesel-electric system — eight MTU generators powering four electric motors, pushing twin azimuth drives.

Lürssen indicated that this project incorporates new technologies aimed at more efficient, “smart” operation of a yacht this scale . The choice of diesel-electric propulsion is a key part of that strategy: by decoupling the engines from the propellers, the yacht’s power management becomes far more flexible and efficient, reducing fuel burn and emissions for a given speed or electrical load. The diesel-electric setup, combined with modern exhaust treatment, helps ensure compliance with the latest environmental regulations (such as IMO Tier III for NOx emissions).

This isn’t about novelty. It’s about quiet, consistent operation.

What this gives the owner:

Better torque control
Reduced engine room footprint
Lower vibration throughout the vessel
Quiet cruising at low speeds
More efficient long-distance performance

Industry observers note that Deep Blue signals a broader shift: even owners of the largest superyachts now prioritise eco-conscious features and intelligent engineering alongside luxury. This yacht has been widely described as a forward-thinking build.

Deep Blue is expected to reach a top speed of around 20 knots (approx. 23 mph) . Her cruising speed is likely a bit lower (perhaps in the mid-teens knots for efficiency), which, coupled with massive fuel tanks, should give Deep Blue a transoceanic range well over 4,500 nautical miles before refueling . This would enable globetrotting voyages, allowing the yacht to cross the Atlantic or Pacific and remain at sea for extended periods.

The setup is designed for discretion. Not just in sound, but in operational footprint.

Espen Øino’s Design? Strong Signs — But Still Unconfirmed

Lürssen has not revealed the exterior design studio responsible for Deep Blue — a deliberate choice that has fuelled industry speculation. Two names consistently surface: Espen Øino and Nuvolari–Lenard. Both are long-time collaborators on Lürssen’s flagship projects and have the portfolio to match a yacht of this size and profile.

While the true authorship remains unconfirmed, the styling choices strongly reflect the work of either studio — with sleek proportions, layered functionality, and visual drama evident across the entire exterior.

A Reversed Colour Concept

One of the most talked-about design elements is the yacht’s unconventional livery. Instead of the typical dark hull and pale superstructure, Deep Blue features a bright white hull crowned by a metallic deep-blue superstructure. This reversal draws the eye upward and gives the vessel a distinctive silhouette — further emphasised by panoramic dark-glass windows and a black-finished central mast that hosts navigation domes in a minimalist arrangement.

Tiered Terraces and Infinity Pool

The aft deck is a showcase of outdoor architecture. From the beach club at sea level to the stepped lounge terraces above, the design creates both vertical drama and usable space. At the top tier sits a large infinity-edge pool with curved ends — a focal point for recreation that visually anchors the rear profile.

Helipad Forward, Privacy Maintained

On the foredeck, a flush helipad offers touch-and-go helicopter access for guests and owners, without interrupting the clean exterior lines. Its position allows efficient use while maintaining privacy and deck flow elsewhere.

Symmetrical Aft Staircases

From the swim platform, twin sweeping staircases — port and starboard — lead up to the main deck. This classical design move adds symmetry and formality, and provides a graceful transition from tenders to the main outdoor areas.

Built for Presence and Use

Despite her immense volume, Deep Blue avoids the boxy profile of some large yachts. Instead, the use of long sheer lines, tapered geometry, and layered decks helps soften the scale. Every exterior element serves dual purposes — aesthetic cohesion and functional outdoor living.

Interior by Zuretti? Silence May Be the Best Clue

No official confirmation. No teaser images. No media walkthrough.

Zuretti is the most likely interior designer, based on project associations and past collaborations.

But this kind of silence usually tells you everything.
No press often means it’s for private use only — no charters, no visibility, no compromises.

Interior Grandeur Aboard Deep Blue (As Understood by Industry Insiders)

With an interior volume nearing 9,000 GT, Deep Blue offers palatial living spaces distributed across multiple decks. Although the interior designer has not been publicly confirmed, every element points to an ultra-luxurious brief — balancing functionality, privacy, and indulgence in every zone.

Guest Accommodation and Layout

Deep Blue is expected to host up to 24 guests in high-spec staterooms, with more than 40 crew members onboard to operate the vessel and manage hospitality. Given her scale, it’s likely that guest cabins — including VIP suites and a sprawling owner’s apartment — span multiple decks. Some observers have suggested that even the main deck may house guest accommodations, which is typical for yachts in this size class. Interiors are anticipated to feature high ceilings, bespoke furniture, fine materials, and curated artwork, all tailored to the owner’s specifications.

Pools and Beach Club

The yacht includes multiple pools, with a large infinity-edge pool positioned on the upper aft deck, offering panoramic views. Additional pools and jacuzzis are distributed throughout the decks. At the stern, a full beach club at sea level serves as a sun lounge during the day and transitions into a stylish waterfront nightclub environment in the evening. This area provides direct access to the water for swimming and water sports.

Spa, Gym and Beauty Salon

A full-service spa and gymnasium are integrated into the yacht’s interior. These facilities allow guests to enjoy massages, beauty treatments, and workouts without leaving the vessel. There’s also a professional skincare and hair salon onboard, offering personal grooming and pampering throughout extended voyages.

Entertainment and AV Integration

Deep Blue includes a dedicated cinema room, equipped with high-end projection and surround-sound systems for an immersive theatre experience. Throughout the vessel, advanced AV systems and satellite communications keep guests connected. High-speed Wi-Fi and streaming services are available in all guest areas, enabling everything from movie nights to onboard parties.

Helipad and Water Toys

A certified helipad is positioned on the foredeck, enabling helicopter arrivals and emergency evacuations. The yacht also carries a fleet of tenders and recreational toys, housed in concealed garages forward and aft. While exact details are undisclosed, it’s likely that the yacht includes custom limo tenders, RIBs, jetskis, and possibly a submarine or sailing dinghies, in keeping with vessels of this calibre.

Guest Comfort and Accessibility

Deep Blue is equipped with both at-anchor and underway stabilisers, ensuring comfort regardless of sea conditions. All guest spaces are fully air-conditioned and climate controlled, with environmental consistency across every zone. A guest elevator services the interior, allowing convenient access between the beach club, accommodation decks, and sundecks. From grand foyers to private lounges, every interior space has been crafted to the highest standards of finish and functionality.

**Who Owns Deep Blue? Rumours Still Circulating**

As is common with high-profile superyachts, the ownership of Deep Blue is shrouded in secrecy. Lürssen and involved parties have not disclosed the owner’s identity. However, there are unconfirmed rumors in yacht-watching circles pointing to a billionaire from India or China as the client behind.

AIS tracking is disabled. No registered flag has been confirmed.
No known tenders or chopper movement gives anything away.
This may be one of the most private launches of the past decade.

**Why Deep Blue Reflects a Change in Owner Priorities**

Deep Blue isn’t a showpiece. She reflects a different kind of owner — one who values silence, simplicity, and long-range independence.

Reports indicate Deep Blue is undergoing final sea trials and outfitting tweaks in the North Sea, with delivery to her owner expected in autumn 2025 . Once handed over, she will embark on her maiden voyages, instantly becoming one of the most notable yachts on the oceans. With her blend of size, luxury, and advanced technology, Deep Blue is poised to be a headline-making flagship for years to come.