Oceanco launches Leviathan, a 111m diesel-electric superyacht redefining purpose-driven design at sea

Oceanco has unveiled Leviathan, formerly known as Project Y722, a 111-meter (364-foot) diesel-electric superyacht conceived around purpose rather than convention. Commissioned by an experienced owner who prioritized crew wellbeing, operational efficiency, and human-centered design, the project reframes what large yachts can be when build choices are guided by how people actually live, work, and explore at sea.

While Oceanco is a privately held Dutch shipbuilder and not publicly listed, the launch lands at a moment when the global superyacht sector is recalibrating around function, sustainability, and multi-role capability. In recent years, owners have increasingly sought vessels that double as hospitality platforms, research outposts, and self-sufficient marine ecosystems. Leviathan’s crew-first design, hybridized power approach, and adaptable spaces echo that shift, signaling where demand is moving as next-generation buyers bring pragmatic expectations to ultra-custom builds.

Placing People at the Center of Superyacht Innovation

From the earliest design sprints, the owner and shipyard elevated crew input from “operator feedback” to “design mandate.” Crew were invited to help shape decisions typically made in isolation — from materials and surface treatments to traffic flow and backstage service routes. The brief was not to eliminate labor but to redirect it from repetitive polishing and refinishing toward higher-value work such as guest experience, complex logistics, and mission planning.

That philosophy shows up in the materials palette. Instead of maintenance-intensive elements like polished wooden cappings, teak decking, and large painted superstructure surfaces, Leviathan employs composite capping rails, composite decks, and full-height glass bulkheads that preserve a clean, modern aesthetic while cutting routine upkeep. Interior selections such as honed stone and natural wool carpets reinforce durability without sacrificing warmth, allowing teams to shift time into training, safety drills, and service refinements that guests actually feel.

How Collaboration Shaped the Vessel’s Technical Direction

The program was a multi-year collaboration across hundreds of disciplines, with naval architecture by Oceanco and Lateral Naval Architects, exterior design by Oceanco, and interiors by Mark Berryman Design. The owner engaged closely throughout, supported by YTMC as technical representatives and Y.CO on program management and future operations. To honor that collective effort, a glass panel inscribed with the names of more than 2,000 contributors now anchors the main staircase — a permanent, visible statement that this yacht was built by people for people.

Leadership voices across the project underscored the philosophy. Oceanco’s project director characterized Leviathan as a different model for design, ownership, and operations, while YTMC’s managing director highlighted the union of quiet comfort and structural strength. Y.CO’s co-founder framed the yacht as a working ecosystem designed to support world-class hospitality as comfortably as scientific activity — reflecting a market trend in which large yachts are expected to change modes without friction.

Narrative Specifications, Powertrain, And Habitability

Leviathan measures 111 meters in length with a beam of 17.8 meters (58 feet), creating generous volumes for guest areas, technical spaces, and crew facilities. The exterior profile integrates long, disciplined horizontal lines with expansive glazing, maximizing natural light and sightlines while visually lowering mass. The interior by Mark Berryman Design emphasizes tactile materials, storage intelligence, and workflow clarity so that the hospitality front-of-house and operational back-of-house can both run at peak efficiency.

A diesel-electric architecture underpins propulsion, aligning with the sector’s steady move toward hybridized and lower-emission solutions. While detailed performance metrics have not been disclosed, the architecture is designed to optimize hydrodynamics for range cruising, reduce noise and vibration, and support hotel loads with greater efficiency. The result is a platform that prioritizes calm interiors, predictable handling during extended passages, and the power flexibility needed for expedition tenders, dive support, or scientific payloads if the owner’s program calls for it.

Why a Crew-Centric Build Matters for the Next Wave of Superyachts

Elevating crew input during the design phase has practical and commercial implications. Owners increasingly benchmark experience quality not only by guest suites and amenities but by how rested, trained, and retained their crew are across multi-season programs. Material choices that reduce daily abrasion cycles or time-intensive varnish schedules translate directly into higher-touch service, quicker turnarounds between guest rotations, and better morale. For charter-capable yachts, these advantages can support premium day rates, fewer off-hire days, and a reputation for reliability in demanding itineraries.

This human-centered approach also intersects with ESG-driven expectations. Durable finishes reduce chemical use and waste associated with frequent refinishing; intelligent power management curbs fuel burn; and adaptable spaces future-proof the platform for evolving regulations and new technologies. In a market where value is increasingly tied to operational resilience and optionality, leviathan’s design intent reads as a hedge against both reputational and regulatory risk.

Historical Context Linking Design Philosophy to Sector Trends

A decade ago, many flagship builds expressed opulence through gloss — acres of teak, high-sheen brightwork, and heavily painted superstructures. As expedition hulls, shadow vessels, and hybrid powertrains gained traction, form began to follow function. Owners who cut their teeth in technology, logistics, and private equity brought an operator’s mindset to their fleets, asking whether the hours spent polishing might instead be invested in service, training, or exploration. Leviathan sits squarely in that lineage, taking the lessons of expedition-style practicality and applying them to a sleek, hospitality-forward platform.

At the same time, the supply chain supporting large yachts — from advanced composites to low-VOC coatings, vibration isolation, and smart glass — has matured. Designers can now specify materials that meet superyacht standards of finish without the maintenance penalties of legacy choices. That industrial evolution enables the kind of “effort redirection” that leviathan’s owner sought from day one.

Early Market Sentiment and Competitive Signaling in the 100m+ Class

In the 100-meter-plus segment, each launch is a signaling event watched by owners, captains, brokerages, and shipyards. Leviathan’s debut reinforces Oceanco’s positioning in large-format fully custom builds and suggests a continued pivot toward functional luxury — an area that has been outpacing the overall market as owners request multi-role capability without sacrificing design purity. For competitors, the message is clear: future flagships will be judged as much by maintainability, acoustic comfort, and crew workflow as by canopy pools and novel beach clubs.

For supply-chain partners and refit yards, the build philosophy hints at downstream demand for composite replacements, coatings that hold up under heavy service, and interior textiles that balance luxury with cleanability. Although Oceanco’s private ownership means there is no direct read-through to public equity flows, adjacent listed players in materials, marine electronics, and specialty manufacturing will be watching adoption patterns that leviathan could catalyze.

Sea Trials, Program Readiness, and Operating Profiles

Leviathan is slated to begin sea trials in the coming weeks, a phase that will validate integration across propulsion, power management, hotel systems, and noise-vibration baselines at a variety of loads and speeds. Trials also provide a proving ground for crew workflow: galley cadence against guest service windows, tender ops in marginal conditions, and turnarounds between activity modes. The yard and owner team typically use this window to fine-tune software parameters, adjust trim for target fuel curves, and lock in maintenance regimes before delivery.

Once operational, Leviathan is expected to split time between traditional high-season grounds such as the Mediterranean and Caribbean and extended-voyage programs where her powertrain efficiency and service design can be fully leveraged. Given the owner’s stated intent, the yacht could also support philanthropic work or research-adjacent missions, ranging from ocean health initiatives to logistics support for conservation partners, if and when the itinerary calls for it.

How Leviathan could Influence Future Large-Yacht Briefs

If Leviathan performs to plan, she will provide a case study that future owners and yards can point to when advocating for effort-redirecting materials, acoustically quiet machinery layouts, and crew-informed backstage design. The near-term influence will be most visible in specifications and owner briefs: fewer square meters of varnish, more intelligent glazing, modular service galleys that scale for events, and hotel systems tuned for low noise at anchor without sacrificing redundancy.

Longer term, expect regulatory frameworks around emissions and materials to tighten. Designs that already internalize durability, power flexibility, and maintenance-light finishes will adapt faster, protecting asset utility and resale potential. In that environment, leviathan reads less like an outlier and more like an early template for how the ultra-custom end of yachting remains aspirational while becoming measurably easier to operate.