Inside the Craftsmanship of GranOcean Power Catamarans: A Behind-the-Scenes Look

At the GranOcean Power Catamaran shipyard, Eric, co-owner and chief designer, offered an exclusive walkthrough of the W-60 power catamaran in production. This rare, behind-the-scenes tour reveals the meticulous build process and design philosophy that sets GranOcean apart in the world of offshore cruising vessels.

Structural Integrity First

Eric begins by emphasizing GranOcean’s foundational philosophy: cohesive connectivity between all components. The W-60 Power Catamaran, like all GranOcean yachts, is engineered with transverse bulkheads that extend from port to starboard. These bulkheads run the length of the vessel, providing critical structural strength from the forward sections all the way to the cockpit.

The main deck and lower deck soles are vacuum-infused panels that connect seamlessly into the deck structure. This one-piece approach ensures the boat flexes and moves as a unified body, dramatically reducing creaking and stress-related noises that often plague lesser-built boats.

High Bridge Deck Clearance

Next, Eric explains the importance of high bridge deck clearance in catamarans. This feature prevents wave slamming in rough seas, enhancing both comfort and speed. The hull itself is fully V-shaped from bow to stern, reinforcing that this is a powerboat built from the ground up—not a sailing catamaran retrofit.

Tender Lift vs. Fixed Platform

Viewers get a unique side-by-side comparison of two W-60s—one equipped with a tender lift and the other with a fixed foredeck platform. This flexibility reflects GranOcean’s semi-custom approach to meet each owner’s needs and preferences.

A Legacy of Design Excellence

Eric shares how GranOcean began as a custom yacht builder in 2001, with Eric joining as a draftsman on a gentleman’s trawler project. The yard’s commitment to seaworthy design has carried through every project since. Alongside his partner Scott, GranOcean transitioned into the power catamaran market through a series of custom builds, eventually launching their signature W Series.

To ensure top-tier performance, GranOcean assembled a dream team of specialists. Eric led the vision and layout design, but brought in:

  • Howard Apollonio for expert hull lines and powerboat design.
  • Gurit (formerly High Modulus) for structural engineering, ensuring strength without excess weight.
  • Freiback for interior styling and material palettes, giving clients elegant customization options.

They’ve also adopted CFD modeling (Computational Fluid Dynamics) in partnership with Steenson Marine of New Zealand to fine-tune hull performance under real sea conditions.

Customization Through Technology

One of the most impressive tools in GranOcean’s arsenal is their 3D design software. It allows clients to visualize the boat inside and out—even see how sunlight casts across the cockpit throughout the day. From printer cabinets to layout shifts, every custom request is modeled to ensure function and comfort on the water.

Partnership with Catamaran Guru

Eric recalls how he reconnected with Stephen and Estelle of Catamaran Guru. Initially inviting Stephen aboard as a friend for feedback, their relationship evolved into a strategic partnership. Today, Catamaran Guru supports GranOcean clients with after-sales service and helps deliver exceptional owner experiences on the water.

Looking Ahead: Expansion and Innovation

With demand growing rapidly, GranOcean plans to move into a new, purpose-built facility by year’s end. The new site will house advanced tools, dedicated build stations, and increased production capacity—ensuring that more exceptional yachts hit the water faster.

From the ground-up powerboat design to elite craftsmanship and thoughtful customization, GranOcean is redefining what a semi-custom power catamaran can be. With a clear philosophy, world-class collaborators, and a customer-first mindset, they’re not just building boats—they’re building legacies.

Ready to Build Your Dream Yacht?

Whether you’re curious about GranOcean’s design process or want to explore semi-custom options for your own power catamaran, our expert team is here to help.

👉 Contact us today to start your journey with Catamaran Guru.

author avatar
Estelle Cockcroft Catamaran Guru Co-Founder
Estelle Cockcroft is a seasoned sailor, catamaran expert, and co-founder of Catamaran Guru. With over 70,000 NM sailed and 30+ years aboard, she empowers new cruisers with expert advice on liveaboard life, yacht ownership, and ocean adventures.

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