ISA's Sea Raider X Is the Yard's Biggest Build Yet, at 67m

What is Sea Raider X, and who built her?

Sea Raider X is a 67-metre motor yacht ISA Yachts built at its Ancona shipyard for a European owner who commissioned her directly, and she is now the largest yacht the Italian builder has ever completed.

ISA Yachts announced the project in March 2023 as a bespoke commission built around a specific owner's brief: take the sporting hull lines the yard's Gran Turismo line is known for and scale them up to a much larger yacht's volume, guest capacity and amenities. The result carries a black-painted steel hull and a silver aluminium superstructure across four decks plus a bilge deck, with exterior styling from Vallicelli Design Studio and interiors by Enrico Gobbi's Team for Design. Naval architecture and structural engineering were developed in-house at ISA, which the yard's parent, Palumbo Superyachts, has increasingly kept internal across its range rather than commissioning it out.

She touched the water in May 2026 and was formally delivered to her owner on 30 July 2026, then went straight to her public debut at the Monaco Yacht Show in September, moored for the show at Port Hercule. Her gross tonnage is not fully settled between sources: YachtBuyer's database lists 1,149 GT, while BOOTE Magazin's delivery coverage puts her at 1,186 GT. Both figures sit comfortably clear of the 500 GT threshold that pulls a yacht into the full SOLAS commercial-vessel rulebook, so the gap is a reporting discrepancy rather than a regulatory one, but neither source has corrected the other and ISA's own press material does not state a figure. She is classed by RINA, Registro Italiano Navale, the same society that classes the bulk of ISA's fleet, though neither ISA nor the other titles covering her state her flag. Her debut also lands inside one of the Monaco Yacht Show's biggest editions yet: organisers count around 120 superyachts at Port Hercule for the 2026 show, 43 of them newly delivered this year, so Sea Raider X shares her premiere week with more freshly built competition than any previous edition.

How does Sea Raider X compare with ISA's previous biggest yacht?

ISA's previous flagship was the 66.4-metre Okto, launched in 2014, so Sea Raider X only overtakes it by 0.6 metres after a twelve-year gap, but she arrives backed by a shipyard group now building far more, and far bigger, than it was then.

Giuseppe Palumbo, sole director of Palumbo Superyachts, has described the growth behind that gap as deliberate rather than opportunistic: "This growth is the result of a long-term industrial vision ... we have consistently invested in people, engineering, production facilities and product development." The group's order book now runs to roughly EUR 1 billion across 25 yachts under construction between its Ancona and Savona yards, spanning 20 to 100 metres, with five deliveries scheduled in 2026 alone, Sea Raider X among them alongside an 80-metre ISA custom, an ISA Viper 130 and an ISA GTO 70.

The same order book already carries an ISA GT 100-metre project, which would nearly one and a half times Sea Raider X's length inside a few years of her delivery. Palumbo has been candid about what changes at that scale: "Delivering a 45-metre yacht and a 100-metre yacht involves very different challenges," he has said, while maintaining that the yard's approach stays fixed on "precision, quality and absolute attention to the owner's vision" regardless of size. Sea Raider X is best read as the proof build for that jump: the first time ISA has carried its Gran Turismo styling and in-house engineering past the 60-metre mark, ahead of a hull nearly double the length.

What features does Sea Raider X's 67 metres actually buy?

The extra length over ISA's earlier flagships goes into a full-beam owner's suite, a 6.5-metre panoramic pool and a beach club with its own hammam, bar and gym, features that a 45 to 50-metre Gran Turismo simply has no volume for.

Sea Raider X sleeps 14 guests across seven cabins, including a full-beam owner's suite on the main deck, and carries 13 crew in eight cabins. The main deck pool runs 6.5 metres, panoramic rather than a plunge tub, and the beach club at the stern adds a hammam, a bar and a gym to the usual swim platform. A side-opening hatch launches the main tender, over 7.5 metres long, without needing the crane-and-davit arrangement smaller yachts rely on, and fold-down terraces on the main deck extend usable outdoor space at anchor well past what the hull's own beam provides.

None of that is unusual on a 67-metre yacht on its own; boats this size from Benetti, Sanlorenzo or Heesen carry comparable beach clubs and owner's decks as a matter of course. What is specific to Sea Raider X is that ISA is delivering it on a hull styled by the same studio, Vallicelli Design, that draws the yard's much smaller sporting models, so the boat reads as a scaled-up Gran Turismo rather than a displacement yacht with sporty detailing added afterward. Whether that translates to genuinely different handling at 67 metres than a from-scratch displacement design would, is not something a delivery-week press release can answer.

What hasn't ISA published about Sea Raider X?

ISA's own materials do not state her engines, top speed, cruising speed or range, and every performance figure circulating for her comes from a third-party database rather than the yard.

YachtBuyer's fleet listing puts twin MTU 16V 4000 M65L diesels aboard, rated at 3,046 hp each for a combined 8,170 kW, driving twin screw propellers, and gives her a beam of 10.5 metres. None of that appears in ISA's own delivery announcement or in BOAT International's or BOOTE Magazin's coverage of it, which means a buyer or a broker citing those numbers is relying on YachtBuyer's own data entry rather than a yard-confirmed spec sheet. Speed, range and fuel capacity are not published anywhere found for this piece.

That gap is normal for a yacht delivered to a private owner rather than built for sale; ISA has no brokerage listing to fill in and no sea trial report to publish, because Sea Raider X was never going to be tested by an outside title. She also has no sister ship yet, no resale history, and no price attached to weigh against comparable 67-metre yachts from established yards, because she was never for sale in the first place. For ISA, her value as a company asset is less about this single boat and more about proving, in public at Monaco, that it can carry its own design language up past 60 metres before its first 100-metre hull leaves the yard.