ISA delivers Sea Raider X, a 67m flagship and the yard's largest
The yard's biggest, and a change of scale
Sea Raider X measures 67 metres, wears a black-painted steel hull under a silver aluminium superstructure, and spreads her layout across four decks plus a bilge deck. She was launched in Ancona on 8 May 2026 and has now been handed over after a summer of trials. In a yard history that runs back a quarter of a century, she is the largest yacht ISA has ever built.
The exterior lines are by Vallicelli Design Studio, the interior by Team for Design with Enrico Gobbi, and the naval architecture was drawn in-house. The accommodation runs to 14 guests in seven cabins, with a full-beam owner's suite set forward on the main deck. A crew of 13 plus the captain is housed in eight cabins.
A pool, a beach club and a side-launched tender
The social case for the boat sits aft. A 6.5-metre panoramic swimming pool anchors the main deck, and a beach club at the waterline carries a hammam, a bar and a gym. Opening side platforms fold out to widen the walkable surface once she is at anchor, the Gran Turismo line's stock move for turning hull volume into deck.
Stowage is built around a main tender of more than 7.5 metres, launched through a side hatch rather than lifted off a deck. That keeps the top decks clear for guests and reflects the choice, on a boat this size, to treat the tender as a garage problem rather than a crane one.
Why the owner cares
ISA sits inside Palumbo Superyachts, a group better known for refit yards and production-rooted builds than for one-off flagships. Sea Raider X is the evidence that it can deliver a full-custom 67-metre in steel, a different survey, flag and resale pool than the composite boats a tier down. For anyone speccing an Italian yacht above 60 metres, that is a new name on the shortlist.
The Gran Turismo badge traces back to the 66-metre Okto, still one of ISA's most copied profiles. Sea Raider X carries it up a size and into heavier displacement, which is the real signal here: the line that made the yard's reputation now tops out higher than it ever has.
What does Sea Raider X inherit from the Gran Turismo name, and what changed
Sea Raider X keeps the same design partnership that built the 2014 flagship Okto twelve years earlier, but the brief was to move the Gran Turismo language forward rather than reproduce it, and the numbers back that up: more tonnage, more beam and a bigger social deck.
Sea Raider X's lineage runs directly back to Okto, the 66.4 metre ISA delivered in 2014 to a hull and exterior from Andrea Vallicelli, the yacht that first put ISA's Gran Turismo idiom on the international radar and has stood as the yard's flagship ever since. The new boat keeps the same exterior partnership with Vallicelli Design Studio and the same interior house, Team for Design under Enrico Gobbi, while naval architecture was developed in-house at ISA rather than bought in. Reporting on the project has been consistent that the commission drew on the Okto relationship but was never meant to recreate that yacht. Delivered on 20 July 2026 out of the Ancona yard, four months after her May 8 launch ceremony, Sea Raider X now takes the flagship title outright at 67 metres, a metre and a half longer than the boat she replaces.
On paper the advance is real, not cosmetic. Sea Raider X measures 1,149 GT against Okto's smaller footprint, on an 11.5 metre beam and a listed maximum draft of 2.8 metres, spread across four full decks plus a bilge deck, in a steel hull with aluminium superstructure and teak decks, finished in the black-and-silver paint scheme ISA has used to sell the boat's line rather than hide it. Top speed and cruise are the two figures every outlet agrees on: 18.5 knots and 16 knots respectively off twin MTU diesels, though the shipyard has not put an engine model or a fuel figure into its own release, so any specific horsepower number circulating online should be treated with caution. Megayacht News is the one outlet that put a range figure to her, 5,500 nautical miles at a 12 knot cruise, a number worth flagging as reported rather than confirmed, since neither ISA nor Boat International has repeated it independently.
Where does ISA sit against Sanlorenzo, Rossinavi, Baglietto and Tankoa at this size
ISA is a heritage name founded in 2001, but its current chapter starts with the Palumbo Group's 2016 acquisition of the Ancona site, and Sea Raider X reads as a scale credential for a yard whose peers already deliver routinely above 60 metres.
ISA opened at Ancona in 2001, changed hands more than once, and was bought by the Palumbo Group in August 2016, a deal a local court had to approve before it closed. Palumbo has since run the same 35,000 square metre site, split across four industrial buildings with capacity to build up to 120 metres, as home to three brands at once: ISA, Columbus Yachts and Extra Yachts. Sea Raider X becoming the largest yacht the yard has built to date is a statement about this ownership era specifically, not just about ISA's history. Okto, the yacht she supersedes, was delivered in 2014 under the previous ownership structure but with the same Vallicelli-led design team, which is part of why ISA has been careful to frame Sea Raider X as continuity of design rather than a fresh start.
Measured against the other Italian names building at this size, ISA is the smaller-volume specialist. Sanlorenzo, running since 1958 out of La Spezia, and Rossinavi, since 1980 across sites between Viareggio and Pisa, both deliver more frequently in the 60 metre-plus bracket. Baglietto brings a 170-year aluminium heritage to the same waters, and Tankoa has built its newer reputation on hydrodynamic efficiency across a 50 to 90 metre custom range. ISA's answer is not volume, it is the sporty, curve-led Gran Turismo hull language none of those yards is chasing in quite the same way. A Gran Turismo 68M is already scheduled for 2028, which makes Sea Raider X a bridgehead rather than a peak, with her world debut at the Monaco Yacht Show in September 2026 the first real test of that positioning against the fleet at anchor.
What owners and crew report
The pool and beach club are the real differentiator on delivery
Coverage of the handover singles out the 6.5-metre main-deck pool and the waterline beach club with its hammam, bar and gym as the features that separate Sea Raider X from ISA's earlier flagships, not the length alone.
Skipper ONDECK's delivery reportThe tender arrangement is a deliberate trade-off, not an afterthought
Launching the main tender through a side hatch rather than craning it off the top deck is called out specifically as keeping the upper decks clear for guests - a choice that costs some garage flexibility for more usable outdoor space.
Megayacht News's coverage of the delivery
What is good, and what to watch
Strong points
- The largest yacht ISA Yachts has builtAt 67m she surpasses the yard's prior flagship, the 66.4m Okto (2014), a real step up in scale and in-house engineering rather than a rebadge of a smaller platform.
- Full-custom construction with genuine one-off flexibilityIn-house naval architecture, Vallicelli exterior and Team for Design interior give an owner flexibility that production and semi-custom yards can't match at this size.
- Unusually generous amenity spec for the bracketA 6.5m main-deck pool, full wellness beach club with hammam, bar and gym, and a 7.5m-plus side-launched tender are generous even for the 65-70m bracket.
- Design continuity is genuine, not marketingSame exterior house (Vallicelli) and interior house (Team for Design, Enrico Gobbi) as the 2014 flagship Okto, with naval architecture kept in-house.
- A second, larger Gran Turismo is already booked for 2028The 68M commitment means this delivery reads as movement into the bracket rather than a one-off flagship stunt.
What to watch
- A first-of-scale build with no track record yetSea Raider X is the debut hull of ISA's new Gran Turismo 67M model and the yard's first yacht past 66.4m in over a decade, so there is no history of how this specific platform performs or holds up.
- Newer to full-custom builds at this size than the established namesISA, a Palumbo Superyachts brand, is newer to consistent full-custom builds at 65m-plus than Feadship, Oceanco or Lurssen, each with decades of resale and performance history at this size - a factor that typically affects resale liquidity.
- Steel hull means a narrower resale pool than composite rivalsA standard steel-versus-composite trade-off at this size, not a defect specific to this build, but relevant to a buyer comparing against aluminium-hulled competitors of similar length.
- No independent sea trial exists yetEvery published performance figure currently traces back to the yard, not an independent test.
- No engine model, horsepower or fuel capacity in ISA's own releaseAny specific power figure seen elsewhere should be treated as unconfirmed.
- Guest and crew cabin counts vary between otherwise reputable sources7 cabins/8 crew cabins in ISA's own release and Boat International's news piece versus 5 staterooms in Boat International's own directory entry for what should be the same vessel, a discrepancy worth flagging rather than silently picking one.
Practical detail
| Price | No public price. Sea Raider X is a full-custom, one-off commission; Boat International, SuperYacht Times, YachtBuyer and Megayacht News all cover the delivery without a figure, and ISA's own delivery release names none - standard practice for a bespoke build at this level. |
|---|---|
| Annual running cost | No figure published for this hull. Broker rule of thumb puts annual running cost at roughly 10-15% of a yacht's value for a vessel this size, which needs a disclosed build value to convert into a number - one the owner has not disclosed. |
| Charter | Not available for charter. YachtCharterFleet lists Sea Raider X as a private yacht, marked not for charter, consistent with a full-custom flagship built for one owner's private use. |
| Comparable asking prices, 65-70m full-custom steel bracket | New-build commissions in the 60-70m range typically run from roughly USD 45m from a recognised yard up to USD 100m-plus for a fully specified build. Resale examples in the same class span a wide spread: a 65m Feadship (Seanna) at EUR 44m, a 70m listing at EUR 77.5m, and a 65m Royal Huisman new-build asking EUR 125m - yard reputation and specification move price at this size as much as length. |
| What is not published | The contract or build price, the build cost, and the exact delivery contract date. Coverage confirms delivery on 20 July 2026 ahead of a Monaco Yacht Show debut and that she is the largest yacht ISA has built, but no outlet has independent sea-trial figures beyond the yard's own quoted 18.5-knot top speed and 16-knot cruise. |
| Predecessor flagship | Okto, 66.4m, delivered 2014, same exterior design partnership |
| Build site | ISA Yachts, Ancona, Italy (Palumbo Superyachts) |
| Launch to delivery | Launched 8 May 2026, delivered 20 July 2026 |
| Configuration | Four decks plus bilge deck, 6.5m panoramic pool on main deck aft, beach club with hammam, bar and gym |
| Next flagship | ISA Gran Turismo 68M already announced for delivery in 2028 |
Questions this story answers
What happened?
ISA Yachts has delivered Sea Raider X, a 67-metre Gran Turismo that is the largest yacht the Ancona builder has put in the water in its quarter-century. The black-hulled steel flagship resets the top of ISA's line, with a 6.5-metre pool, a full-beam owner's suite forward and room for 14 guests. For a buyer weighing an Italian 60-metre-plus, she is a marker of how far a production-rooted brand can push into full-custom territory.
What is good about it?
The largest yacht ISA Yachts has built. At 67m she surpasses the yard's prior flagship, the 66.4m Okto (2014), a real step up in scale and in-house engineering rather than a rebadge of a smaller platform.
What should an owner or buyer watch?
A first-of-scale build with no track record yet. Sea Raider X is the debut hull of ISA's new Gran Turismo 67M model and the yard's first yacht past 66.4m in over a decade, so there is no history of how this specific platform performs or holds up.
What do owners and crew report?
Coverage of the handover singles out the 6.5-metre main-deck pool and the waterline beach club with its hammam, bar and gym as the features that separate Sea Raider X from ISA's earlier flagships, not the length alone. (Skipper ONDECK's delivery report)
Who reported this?
ISA Yachts, Robb Report, Skipper ONDECK, Yachting Magazine, Megayacht News, YachtCharterFleet, Boat International, Superyacht Times, YachtBuyer.
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