Sea Raider X: from 66m idea to ISA's biggest yacht yet

Delivered on 20 July 2026, the 67-metre Sea Raider X is confirmed as the new flagship for ISA Yachts, featuring a prominent 6.5-metre panoramic pool and a versatile, full-beam beach club. The vessel marks a significant expansion for the Italian shipyard, with exterior design by Vallicelli Design and interiors by Enrico Gobbi – Team for Design.

Sea Raider X started life as a 66-metre idea. She left ISA Yachts shipyard in Ancona a 67-metre flagship, and according to Boat International and SuperyachtTimes, the largest yacht ISA Yachts has ever built.

The Italian shipyard, a brand of Palumbo Superyachts, delivered the new ISA Gran Turismo 67M on 20 July 2026, four decks plus a bilge deck of black-painted steel hull under silver aluminium superstructure. She's now working through final preparations for her world premiere at the Monaco Yacht Show in September, where she'll be shown for the first time.

Her story goes back further than the delivery date suggests. According to YachtBuyer, ISA announced the sale of a bespoke 66-metre project to a European owner back in March 2023. As the brief developed, the boat grew, eventually settling at 67 metres and becoming the platform for what's now the Gran Turismo 67M line. Rather than adapting an existing hull to a new owner's wishes, the commission effectively became the prototype for ISA's largest Gran Turismo yet, a yacht built specifically around bigger social spaces and a more ambitious beach club than the range had carried before.

That growth shows most in the main deck's aft end, which ISA describes as the most significant innovation on board. The entire area's been rebuilt around a 6.5-metre panoramic swimming pool, with two fold-down side terraces that fold the lounge out into an unusually generous stretch of open deck. Integrated staircases run straight down from there to the aft platform and beach club below, so the flow between decks reads as one continuous space rather than a series of separate rooms.

Below decks, the beach club does double duty. A 7.5-metre-plus tender launches through a side-opening hatch straight from the garage, and once she's away, the whole covered aft section, hammam, bar, gym and all, opens out into a full-beam entertainment area that effectively doubles the beach club's usable footprint. It's a solution built for owners who want the tender garage to earn its keep as living space the moment it's empty, rather than sitting as dead volume between outings.

The Gran Turismo tag marks ISA's sportier design language, and Sea Raider X wears it plainly. The black hull and silver superstructure set up a deliberate visual contrast, and that same contrast plays out structurally: flowing, organic deck lines running up against the bold, diamond-shaped geometry of the transom and sundeck superstructure. A "frame" element ties the two languages together, running from the wheelhouse roof back to the aft bulwark of the main deck, and it's the detail ISA points to as the clearest link back to the rest of the Gran Turismo family.

Vallicelli Design drew the exterior lines, a studio with a long-running relationship with ISA stretching back over a decade of projects. Interiors are the work of Team for Design – Enrico Gobbi, fitted for up to 14 guests across seven cabins, with a full-beam owner's suite set forward on the main deck for maximum privacy and light. Naval architecture stayed in-house at ISA. Running the yacht takes 13 crew plus her captain, across eight cabins, a ratio that reflects just how much of the guest-facing volume has gone into those reworked social spaces rather than crew quarters.

Power comes from twin MTU 16V 4000 M65L diesels, delivering a combined 6,092hp on conventional twin-screw propellers, according to YachtBuyer, which also lists her gross tonnage at 1,149GT and beam at 10.5 metres. None of those figures come from ISA's own release, so treat them as well-sourced rather than confirmed by the yard directly.

ISA isn't stopping at 67 metres. The yard already has a 100-metre superyacht in build, due for delivery in 2029 and designed to take over as fleet flagship once she's launched. Sea Raider X's run at the top of ISA's range, in other words, comes with an expiry date built in from the start, which makes her Monaco debut this September less a victory lap than a preview of how far the yard plans to keep climbing.

Find out more about the ISA Yachts Gran Turismo.