Which shipyards actually build purpose-built shadow vessels?

Six or seven yards build the majority of the world's purpose-built support vessels, with another handful active in conversion work. The working set for the 2025-2026 build season is Damen Yachting in Vlissingen, Astilleros Armon in Spain with the Shadowcat brand and Incat Crowther, Lurssen in Germany for fully custom hulls above 80m, Lynx Yachts in the Netherlands with the YXT range, Echo Yachts in Australia, and ROAM in the USA at the smaller end. Shadow Marine originated the offshore supply vessel conversion route.

How long does a support vessel take from contract to delivery?

It depends entirely on which end of the market you are buying. Lurssen and the large Damen hulls are running 36 to 48 months from contract, with the wider Damen Yacht Support range quoted at 24 to 36 months. Lynx and ROAM can deliver in 18 to 24 months, and the 48m Shadowcat ToyBox can be built at Armon in 18 months. Conversions of offshore supply vessels are the quickest route at 12 to 18 months. The build window is one of the four questions that sets your shortlist.

What size shadow vessel suits a 50m mothership in the Mediterranean?

For a 50m Mediterranean programme, look at the Lynx YXT range, a smaller Damen, or Shadowcat rather than the top of the Damen range. Lynx covers 24 to 40m and is sized to follow motherships of 50 to 80m, in aluminium, with garage and crane launching for tenders and chase boats up to 14m. ROAM covers 24 to 40m for programmes that do not justify a Damen YS 4508 commitment. The 48m Shadowcat ToyBox is sized for 50 to 70m motherships.

What are the specifications of the largest Damen Yacht Support hull?

The YS 7512 is Damen's current flagship at 75m, with 12.6m beam, 1,900GT and accommodation for 45 people including a helicopter hangar. The Yacht Support range now spans 45 to 75m, and the smaller YS 4508 at 45m and YS 5009 at 55m are the workhorses of the category, the 5009 delivering across more than a dozen hulls. Damen's philosophy is commercial DNA: proven offshore hull platforms, finished to yacht standard above the waterline and kept simple below.

Shadow Vessel Builders | Support Vessels

The shadow-vessel and support-vessel market is small, concentrated, and remarkably specialised. Six or seven shipyards build the majority of the world's purpose-built support vessels, with another handful active in conversion work from commercial offshore hulls. The list below is the working set as of the 2025-2026 build season, with notes on what each yard does well and where the gaps are.

Damen Yachting (Vlissingen, Netherlands)

The largest single producer of purpose-built support vessels by volume. Damen's Yacht Support range now spans 45 to 75m, with the YS 7512 the current flagship at 75m, 12.6m beam, 1,900GT, and accommodation for 45 people including a helicopter hangar (Wikipedia: Yacht support vessel). The smaller hulls, YS 4508 (45m) and YS 5009 (55m), are the workhorses of the category, with the 5009 in particular delivering across more than a dozen hulls.

The Damen build philosophy is commercial-DNA: built on proven offshore hull platforms, finished to yacht standard above the waterline, kept simple below. The result is a robust, serviceable, relatively quick-build platform (24 to 36 months from contract) at a price point well below custom. Damen also builds the SeaXplorer expedition range (55, 75, 90, 100m) for owners wanting expedition-spec rather than support-spec hulls.

Astilleros Armon (Spain) and Shadowcat

Armon, partnered with the Shadowcat brand and naval architects Incat Crowther, has delivered three purpose-built support vessels since 2019, including the 66m M/Y Hodor (2019), the 48m sub-500GT catamaran ToyBox, and the 69.2m monohull Shadowolf (Shadowcat / Onboard Magazine). The catamaran configuration is unusual in the category and gives Shadowcat a distinct fuel-economy and deck-area profile compared with the Damen monohull range.

Shadowcat's strength is configurability. The 48m ToyBox can be built in 18 months at Armon and is sized for 50 to 70m motherships; the 69.2m Shadowolf is sized for 90m+ programmes. The naval architecture is consistent across the range, which simplifies operation and crew transfer between hulls.

Lurssen (Germany)

For owners commissioning a fully custom expedition or support vessel above 80m, Lurssen remains the benchmark. The yard does not build to type; every hull is bespoke. Recent deliveries in this category include support vessels for several large mothership programmes, with build budgets and lead times that put them in a different bracket from the Damen and Armon volume offerings. Lurssen's broader yacht output is documented in the list of yachts built by Lurssen.

Lurssen's edge is engineering. The yard's expertise in large naval and government craft translates directly into a support-vessel programme that needs robust helicopter, fuel, and stabilisation systems on a long-range hull.

Lynx Yachts (Netherlands)

Lynx's YXT (Yacht Xtended Tender) range was one of the first to position the support vessel as a deliberate design type rather than a converted commercial hull. The range covers 24 to 40m, sized to follow motherships of 50 to 80m. Lynx hulls are typically aluminium, with garage and crane-launching facilities for tenders and chase boats up to 14m.

The Lynx product is a different proposition from the Damen YS range: lighter, faster, more refined finish, less working autonomy. For Mediterranean and Caribbean programmes that don't need expedition autonomy, Lynx is often the right answer.

Echo Yachts (Australia)

Echo built the 84m trimaran White Rabbit in 2018 as a support vessel and tender platform combined. The yard is small and bespoke; the engineering on the trimaran platform is genuinely distinctive. For owners wanting a Pacific-region build with a non-monohull configuration, Echo is on the shortlist.

ROAM (USA)

At the smaller end of the market (24 to 40m), ROAM offers fully customisable shadow-vessel hulls aimed at programmes that need shadow-vessel function at a sub-Damen price and lead time (ROAM). The product sits between a large chase boat and a small support vessel and is often the right answer for 50m+ motherships that don't justify a Damen YS 4508 commitment.

Conversion specialists (Shadow Marine, others)

A material part of the market is conversions of offshore supply vessels (OSVs) and platform supply vessels (PSVs) into support vessels. Shadow Marine (now part of the Damen-affiliated landscape via various intermediaries) was one of the originators of this approach. The conversion route trades finish and refinement for capacity and cost: a 70m OSV converted to support-yacht standard can be delivered for €10m to €25m all-in, against €50m+ for a new build, but the result is industrial in feel and operationally heavier on crew and fuel.

For owners with a working brief and a tolerance for industrial aesthetic, conversion is worth genuine consideration. For owners with a guest-facing brief, new build is almost always the right answer.

How to choose

The shortlist for any new support-vessel project comes down to four questions:

What is the mothership length and operating profile? A 50m mothership in the Mediterranean does not need a Damen YS 7512. A 90m global-programme mothership cannot get away with a 38m Lynx YXT.
What is the toy and equipment load? Helicopter, submarine, expedition vehicles, chase boats all consume garage and deck space. A toy inventory drives the hull dimensions before anything else.
What is the operating geography? Polar work pushes toward Damen SeaXplorer or Lurssen custom. Mediterranean and Caribbean push toward Lynx, smaller Damen, or Shadowcat. Global circumnavigation pushes toward Lurssen or large Damen.
What is the build window? Lurssen and large Damen are now 36 to 48 months from contract. Lynx and ROAM can deliver in 18 to 24. Conversions can deliver in 12 to 18.

Read shadow yachts, helicopter support vessels, and expedition support yachts for how each builder's strengths map to specific use cases. Talk to us when you're ready to put numbers on the brief.