Spot the difference: Comparing Lürssen's four launches of 2025

It has been a busy and strategically pertinent year for Lürssen. The German yard expanded its capacity by acquiring the former Nobiskrug shipyard, positioning it for a surge in new-build and refit projects. Alongside investment moves, a handful of exciting yachts splashed – with the 134-metre Project Deep Blue already handed to her owner and the rest to follow in 2026.

The year saw Lürssen launch a series of owner-focused designs that show not only the powerhouses’ capability in mammoth builds but also new takes on distinctive features. From futuristic, glass-dominated profiles to the ultra-classic timeless lines, this year’s four launches – Project Deep Blue, Boardwalk, Project Cosmos and Ace 21 showcase Lürssen’s signature style and bold new standout designs. 

Using data exclusively from BOATPro, BOAT compares five of the shipyard’s headline-making superyacht launches from 2025 – yachts that hit the water for the first time this year, one of which has since been delivered...

Dimensions and profiles

Reading the lines 

At 134 metres, Project Deep Blue dominates Lürssens' most recently launched fleet. Similar to the lines of Lady Jorgia (ex-Apho) with her five-deck layers. By contrast, Boardwalk, measuring 117 metres, results in a different silhouette, with six decks in a traditionally balanced design.

Built for a Japanese owner, Project Cosmos, at a slightly smaller 114 metres, has an impressive 18.7-metre beam and is instantly recognisable from the rest with her explorer-inspired lines. Her continuous upper-level glazing and glass dome atop the forward deck lend a futuristic feel. Finally, Ace 21, the smallest of Lürssen’s 2025 launches at 78 metres, highlights the yard’s signature elongated bow and clean lines in a more compact form.

Exterior differentiators

In the details

Setting herself apart from the rest with her distinctive paint job is Project Deep Blue, the eye-catching blue-painted overhangs and unconventional lower-deck glasswork stand out thanks to a design from the drawing boards of Winch Design, with subtle references to previous Lürssen lines. From colourful to classic, Boardwalk's crisp white palette across six decks is a design by Frank Woll.

Marc Newson penned Project Cosmos' bold exterior (and interior), taking innovation a step further with a continuous glass band running along the upper decks and a dramatic dome taking centre stage – looking more like a futuristic research vessel than a traditional superyacht. Returning to the superyacht hallmarks is Ace 21. Her plumb bow, clean superstructure and uncluttered lines spanning five decks showcase Lürssen’s exterior profiles.

Interior styles and spaces

Behind closed doors

Project Deep Blue remains cloaked in secrecy, with details of her interiors largely undisclosed, but her multiple decks suggest a combination of possible amenities. Information is also limited on Boardwalk; however, her owner has been “deeply involved” in her design process, resulting in timeless interiors courtesy of Amy Halffman. Ace 21’s interiors across her five decks are also yet to be revealed.

On the more radical scale, the Marc Newson interiors on board Project Cosmos are integrated with the yacht’s striking exterior, connecting the large glass dome that houses the owner’s private study, terraces and observation lounge beneath the helipad at the bow in a cohesive, sculptural way.

Lifestyle-led spaces

Time on board

When all are delivered to their owners, life on board each Lürssen will differ depending on the amenities available as per the owner’s brief and ambitions. For this newly launched 2025 fleet, little has been divulged yet; however, the scale and expansive decks suggest variety in onboard experiences. For Project Deep Blue – already with her owner – features such as her two pools and a heli-capable bow are already evident, suggesting a focus on leisure and entertainment.

Similarly, lifestyle features that prioritise leisure are evident on Boardwalk. She hosts a large main pool, a sizeable beach club, a spa pool aft and a putting green. Commissioned by an experienced American owner, she also bears a name that hints at a connection to her possible successor, the 76.5-metre Feadship Boardwalk. Aft pool and Jacuzzi with private terraces and panoramic observation areas are found on board Project Cosmos. Having completed her sea trials in the summer, the yard is yet to uncover further details about Ace 21’s guest and owner spaces.

Propulsion and efficiency

Powering the future

Lürssen has recently been hailed for its shift toward more eco-conscious solutions for powering the fleet, and this year’s Project Cosmos launch is the standout in terms of propulsion innovation. She showcases next-generation systems, among the first equipped with 500 kW methanol fuel cell technology, offering a cruising speed of up to 7 knots for 1,000 nautical miles. For practical and explorer versatility cruising challenging conditions, she also has an Ice Class 1D rating.

Project Deep Blue hit the water from the yard’s new slipway, which accommodates her heavier load of around 9,000 GT; however, engineering details beyond her reliance on eight MTU diesel engines are not known. The propulsion and engineering specifications for Boardwalk and Ace 21 are expected to become clear once they are handed over to their owners next year. However, both are expected to reflect efficiency as well as performance.