“It’s a captain’s dream to run a support vessel,” says captain Matthew D’Offay.

Damen Yachting

If you are the proud owner of a multimillion-dollar megayacht, you might soon find yourself commissioning a second yacht, not out of extravagance but practicality. Shadow vessels, also known as support yachts, travel alongside the main yacht carrying helicopters, specialist crew, medical facilities and anything else that does not fit within the sleek silhouette of the mothership. Yacht buyers use shadow vessels when they don’t want to commission larger yachts and endure the headaches that come with that extra length.

The concept began as something of an afterthought, but it has been gaining traction in recent years. No longer simply garages for overflow, shadow vessels have evolved into comprehensive platforms used for scientific research, treasure hunting and more. “The definition of the yacht support as a mini ecosystem that follows the mothership is quite accurate,” says Enrique Tintoré, product manager of the design & proposal department at Damen Yachting, the Dutch shipyard that dominates the support yacht market. Every support vessel has a unique purpose, but some are more ambitious than others.

Take the Damen Yachting support yacht Gene Chaser as an example. It was on this support yacht that a super-sensitive rapid-result Covid-19 test was born. Dr. Jonathan Rothberg, biotech entrepreneur and owner of the yacht-support duo Gene Machine and Gene Chaser, uses his shadow vessel as a floating laboratory. As well as Covid tests, “the Gene Machine is the reason there’s portable MRI in the world right now,” Rothberg confirms.

According to yachting data platform SuperYacht iQ, 34 support yachts were delivered between 2015 and 2025, compared with just 10 in the decade prior. Before 2019, most of the support yachts in the fleet were former commercial vessels that were converted and given a new lease on life. Now, though, purpose-built supports have seen a sharp uptick in demand. When you take Damen’s commercial branches into consideration (which are responsible for several conversions) the Dutch giant accounts for about a third of all shadow vessels in the fleet.

The trend is clear: Support yachts are no longer a niche curiosity but a fixture at the top end of the market. Submarines, seaplanes and helicopters are standard on board these platforms, but requests can get creative. Damen has built support yachts with everything from dog-walking decks to temporary soccer fields for children.

Tintoré adds that the versatility of these vessels, combined with their engineering and range, makes them natural companions to explorer yachts. Owners use them to go farther, stay longer and do more. For yachts exploring remote regions, they have become almost essential, housing security teams, helicopter pilots, scientific staff and specialist guides.

Helicopter operations are particularly crucial for yacht owners exploring the farthest reaches of the planet, and support yachts are able to turn that dream into reality. Certain Arctic regions mandate a strict two-helicopter minimum rule, and the challenge of refueling and storing a helicopter means that “it’s a luxury to have [helicopter operations] on another vessel that’s always ready to go,” says broker Charles Carveles of Edmiston.

Carveles has sold several of the world’s biggest support yachts. Helicopter operations aside, “the support yachts usually run ahead of the main yacht to set up tenders, load gear" or prepare landing sites. "It all leads to a better guest experience and greater safety.”

While purpose-built support yachts still have a luxury edge, there is a distinct philosophy between the two. “Gene Machine [the mothership] is the Four Seasons,” jokes Rothberg, “and Gene Chaser [the support yacht] is the Holiday Inn.”

That ethos makes support yachts a favorite among crew, too. “It’s a captain’s dream to run a support vessel,” confirms captain Matthew D’Offay of Emotional, a Damen Yachting-built yacht support vessel. Managed for private yacht charter with TWW Yachts, the yacht is a “badass toy,” says D’Offay. “We don’t have teak or stainless [steel] to worry about, just toys and big machines. Maintenance is simple; a full washdown takes a day or less.” The appeal, he believes, is broader than most guests realize.

For busy yachts, support vessels also double as relief platforms: places where crew can rest and rotate out, ensuring optimized schedules and improved morale over long seasons. Tintoré explains that owners with a long-term vision for crew welfare see the value immediately. “Crew from the main superyacht can use the support vessel to disconnect for a few days before going back on duty."

Demand for quality shadow vessels is fierce. According to Carveles, support yachts Game Changer, Wayfinder and U81 each sold in under 80 days, in every case to the first or second interested party. “In fact, all three of those boats sold without the buyers ever even visiting them. If you have a good, well-priced support yacht, it’s like gold dust in today’s market,” says Carveles. “These clients increasingly need them rather than just want them.”

Yacht owner Carl Allen represents another case where the support yacht was purchased without him stepping on board. “I saw [my would-be yacht] Axis from a distance,” he says. “I didn’t even go on it. I just told them we want to buy it.” Allen uses his yacht to search for submerged historical wrecks, leading dives and exploration trips, and considers himself a modern-day treasure hunter.

Other unconventional uses include big-game sportfisherman and founder of loanDepot Anthony Hsieh, who uses his support yacht to pursue record-breaking game fish across the Pacific alongside a fleet of up to 11 other fishing vessels.

Interestingly, the line between mothership and support yacht is blurring, and sometimes being rolled into one single platform. Many younger owners are turned off by the idea of what Tintoré calls “full luxury,” and they value the practicality, flexibility and informality that support yachts can offer. “That’s how [support yachts have] slowly transitioned to sometimes being used as a standalone,” says Tintoré.

Though still a small segment compared with the broader superyacht fleet, the trajectory of the support yacht category is unmistakable. What began as a practical solution has matured into something more thoughtful. For some owners, like Rothberg, it is a laboratory. For others, like Allen, it’s a vehicle for pursuing his wreck-diving dreams. For others, it’s a mobile base for adventure and philanthropy.

Whatever the mission, the shadow vessel has become a companion to the world’s most ambitious yachts and, increasingly, a destination in its own right. As deliveries rise and capabilities expand, the definition of what a support yacht should be is becoming harder to pin down. The only constant seems to be that owners continue finding new reasons to have one.