Oceanco Launches 364-Foot Superyacht Leviathan

The new diesel-electric superyacht was built around crew wellbeing, operational efficiency and a collaborative approach from concept to completion.
Oceanco Leviathan
Formerly known as Project Y722, Leviathan was commissioned by an experienced owner who placed crew wellbeing and operational efficiency at the forefront. Courtesy Oceanco

The Dutch shipyard Oceanco has launched Leviathan, a 364-foot diesel-electric superyacht built with a philosophy of purpose over tradition. Formerly known as Project Y722, the vessel was commissioned by an experienced owner who placed crew wellbeing and operational efficiency at the forefront of the design process.

From the earliest stages, crew members were invited to contribute insights on functionality and workflow, leading to design choices that reduce routine maintenance and free up time for guest services, scientific work and complex operations. Durable materials such as honed stone, natural wool carpets and composite capping rails replace more traditional, high-maintenance elements like teak decks and polished wood trim—changes aimed at improving efficiency without compromising style.

Oceanco Leviathan
Naval architecture was completed by Oceanco and Lateral Naval Architects, with interiors by Mark Berryman Design. Courtesy Oceanco

Naval architecture was completed by Oceanco and Lateral Naval Architects, with exterior styling from Oceanco and interiors by Mark Berryman Design. A glass panel etched with the names of more than 2,000 people involved in the build sits in the yacht’s main staircase, a nod to the project’s collaborative spirit. Leviathan will soon begin sea trials, with further details on her capabilities to follow.