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 yachts, 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 yacht above 80m, Lurssen remains the benchmark. The yard does not build to type; every hull is bespoke. Recent deliveries in this category include support yachts 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 yacht 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 yacht 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 yachts. 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.