Yacht Conversions · The Restomod Method

Commercial vessel to expedition yacht. Twenty years inside the work.

Xplorer Yachts is the practice of Paul M. Madden — 25 years inside the world's premier shipyards, hundreds of commercial-vessel inspections, and a working list of 40+ conversion-grade platforms currently tracked across Europe and the Americas. This is what we do.

The Method

Why a converted commercial vessel is the better expedition yacht.

The luxury yacht market has spent the past two decades selling a white-yacht aesthetic to owners who actually want to go to sea. The conversion thesis is straightforward: the boats built to a commercial class standard go where the boats built to a brochure cannot. Then we restore the hull and modify it for owner-grade expedition service — the Restomod method.

  1. Heavier hull plate. Commercial vessels are built to commercial class — thicker steel, deeper frames, ice strengthening as a routine specification. White yachts are built to MCA LY2 with lighter plate optimised for marina life. The structural difference cannot be retrofitted.
  2. Documented ice class. Most conversion candidates carry DNV, Lloyd's, or ABS ice notation from new. That certification carries forward through the conversion. A clean-sheet new-build owner pays for that class designation; the conversion owner inherits it.
  3. Serious range. 6,000–10,000 nautical miles of range is standard on commercial-vessel platforms. White yachts of equivalent length typically run 4,000–5,500 nm. Range is fuel capacity, and fuel capacity is hull volume.
  4. Documented heavy-weather operations. The donor vessel has typically spent its career operating in 50-knot conditions in the North Sea or the South Atlantic. The stability characteristics are not modelled — they are operated.
  5. The 20–40% rule. A 75–80m new-build expedition yacht runs $100M+. The equivalent conversion runs $20–40M all-in. That ratio is the entire reason the conversion path exists.
Conversion Platforms

The donor vessels that become expedition yachts.

A short taxonomy of the commercial vessel categories that consistently make the best conversion candidates.

01
OSV / PSV Conversions

Offshore Supply Vessels & Platform Supply Vessels.

The most prolific category. Ulstein UT-designs, VS-class, and Norwegian-built PSVs. Diesel-electric propulsion with azimuth thrusters. Working stern decks that convert into beach clubs. 60–90m typical. Built to serve oil majors in the North Sea, the South Atlantic, and the Gulf of Mexico in conditions that would close a white yacht's deck for the day.

02
Research Vessel Conversions

Ice-class research and survey platforms.

Built to support marine science programmes in polar waters. Heavy ice class, large laboratory volumes that convert into owner accommodation, helideck and submersible support facilities built in from the keel. Government and university surplus is the main source.

03
Government Tonnage

Patrol vessels, SAR vessels, customs cutters.

Ex-military and ex-government tonnage from decommissioning programmes. Often diesel-electric, often ice-class, often built to a higher specification than any commercial equivalent. Project C-242 — the 225ft Spanish-built SAR vessel currently in our portfolio — is a classic example.

04
Yacht Support & Shadow Vessels

Conversions as shadow vessels for larger yachts.

Smaller and less ambitious conversions, but a real category — an OSV or ex-fishing vessel converted as a shadow vessel for a larger yacht. Helideck, tender garage, dive ops, additional crew, sub support. We track these as a parallel workstream.

The Process

From inquiry to sea trials.

  1. Operating profile. Where will the vessel be in February? In July? At-anchor or on passage? Crew complement? Guest count? Helideck? Ice class? The vessel works backwards from the chart and the calendar.
  2. Platform sourcing. We maintain a working list of 40+ commercial vessels in Europe and the US currently available for conversion. We have personally inspected most. We have surveys on several. Platform selection is matched to the operating profile.
  3. Engagement letter and retainer. A fixed retainer covers Phase 1: technical qualification, market scan, yard outreach, travel. The retainer credits against any commission earned on a subsequent transaction.
  4. Restomod design. Grant Maughan, VPLP, or the design studio that fits the platform. Hull lines preserved; deckhouse, interior, propulsion smoothing, and outfit specified to owner spec.
  5. Yard tender and contract. Yard selection with the commercial yards that have the skills the work actually requires. Contract negotiation against yards Paul has personally represented. Owner's-representative agreement governs the build phase.
  6. Build supervision and class engagement. Weekly owner reports during the build, in-yard supervision, class society engagement, change-order management, and the snag-list discipline that determines whether a delivery date is real.
  7. Sea trials and delivery. Trials, delivery acceptance, post-delivery snag-list management, and the post-delivery relationship. We stay on after delivery as long as the owner wants us to.
Frequently Asked

Yacht Conversion — questions we hear.

  1. What is a yacht conversion? A yacht conversion takes a commercial vessel — typically an OSV, research vessel, ice-class supply ship, or government tonnage — and re-engineers it as a private expedition yacht. The hull, propulsion, and class certification are retained; the deckhouse, interior, propulsion smoothing, and outfit are upgraded to owner-grade specification.
  2. How much does a yacht conversion cost? Commercial-to-yacht conversions typically deliver expedition capability at 20–40% of new-build replacement cost. A 75-metre new-build runs $100M+; an equivalent conversion runs $20–40M all-in.
  3. What is a Restomod yacht? Borrowed from the classic-car world — restore the proven hull, modify it for modern expedition service. Xplorer Yachts uses the term to describe its yacht conversion practice.
  4. How long does a conversion take? Typically 18 to 24 months from signed acquisition to sea trials. New-build expedition yachts of equivalent size run 36 to 54 months.
  5. What types of commercial vessels make the best conversions? Offshore supply vessels (OSVs), platform supply vessels (PSVs), ice-class research vessels, government patrol vessels, and Coast Guard tonnage. Thick plate, deep frames, documented ice class, redundant propulsion, serious range.
  6. Who handles the design work? Grant Maughan Design is our most frequent collaborator on Restomod design; VPLP Design works with us on wind-propulsion and clean-sheet work. We bring in additional studios as the platform and brief require.
  7. Where are conversions done? We have active engagements in Turkey, Louisiana, Argentina, and France. The right yard for a conversion is almost never the same yard that builds white yachts — commercial yards have the skills and the cost basis the work requires.
  8. Do you broker the donor vessel acquisition too? Yes. Acquisition commissions are paid by the seller; Restomod project-management fees are paid by the owner under a separate owner's-representative agreement. The structure is disclosed in writing on every engagement.
Active Conversion

Project C-242 — ice-class SAR vessel, $25M all-in.

A 2012 ice-class diesel-electric SAR vessel currently in our portfolio — the platform, the engineering, and the working economics of a serious Restomod. Walkthrough video and full brochure on request.

View Project C-242 Request Conversion Brief