German shipbuilder Lürssen is on the verge of delivering a new superyacht: the 78-meter “Ace 21”, which has now successfully completed her first sea trials.
The initial tests took the vessel from Bremen-Nord into the Lower Weser and further into the German Bight in the North Sea. Very little is publicly known about the 78-meter-long and 13.3-meter-wide “Ace 21”, which is estimated to have a gross tonnage of around 2,500 GT. There is no confirmed information about the designer or the possible owner. What is known is that the steel hull and superstructure were built by Stahlbau Nord in Bremerhaven.

Hull construction by Stahlbau Nord
“Ace 21” was built in the covered Lunehalle at Stahlbau Nord (SBN), a subsidiary of the Rönner Group, located in the fishing port of Bremerhaven. In spring 2023, the steel hull was transferred onto the heavy-lift pontoon BHV Innovation and towed to the Neustädter Hafen in Bremen.
Once there, the pontoon was submerged in a specially deepened section of the harbor, allowing the yacht to float for the first time. The newbuild was then towed to Lürssen’s Lemwerder facility, where she was fully outfitted, painted, and completed over the past two years.
In May of this year, the snow-white yacht left the construction dock and has now completed her first round of sea trials. Delivery to the owner is expected later this year. According to unconfirmed reports, the yacht’s owner is an American entrepreneur in the pet food industry.

© C. Eckhardt
Signature Lürssen design
“Ace 21” features the signature elongated bow, expansive glass panels, and sweeping deck lines that define Lürssen’s design language. Spread across five decks, the yacht includes a large Jacuzzi aft, numerous outdoor lounge and dining areas, and steps leading down to a spacious beach club with an infinity pool as the centerpiece of the main deck.
Ace 21 is one of approximately ten yacht projects currently under construction across Lürssen’s various shipyards in Northern Germany. The company recently celebrated its 150th anniversary with the launch of the 134.2-meter Project “Deep Blue” at its Bremen-Aumund facility.