GX Superyachts has launched Merinos, the first yacht of its GX42 series.
The 42.1-metre aluminium superyacht went into the water at Tuzla, in Turkiye, after construction at SES Yachts. She is finishing outfitting and sea trials before a public debut at the Monaco Yacht Show, 23 to 26 September 2026.
The launch gives the brand what it did not have when it appeared at Monaco in 2024: a finished yacht that visitors can walk through, instead of renderings and calculations.
A new brand finally has something physical to argue with
GX Superyachts was created by the team behind Greenline Yachts, which has worked with hybrid propulsion in smaller leisure boats for more than fifteen years.
The GX range is planned from 24 to 56 metres. Merinos is the first 42-metre model and the first serious attempt to move that hybrid and energy-management experience into the superyacht market.
Marco Casali of Too Design did the exterior and the interior. Naval architecture is by NAMES, led by Francesco Rogantin.
The raised pilothouse keeps the profile low while holding 353 gross tonnes of internal volume. The beam is 8.5 metres, the draught 1.9.
Those numbers sit between two owner preferences. She is large enough for five guest cabins, generous exterior decks and long-range cruising, and small enough to stay a private family boat rather than a floating institution.
The real promise is silence at anchor
Merinos combines diesel-electric hybrid propulsion, lithium battery storage and solar generation. Up to 27 kW of panels are built into the hardtop, and the yard says the system can carry hotel loads and selected zero-emission modes, cutting the hours the generators have to run.
Worth being precise about the language. A 42-metre aluminium motor yacht is a substantial engineered object, with the material, energy, maintenance and infrastructure that implies. What Merinos offers is selected zero-emission modes and fewer generator hours, which on a boat of this size is a real engineering achievement.
The credible luxury argument is quieter time on board. Fewer generator hours at anchor means less vibration, less mechanical noise, fewer exhaust smells across the aft deck and the boats nearby.
An owner understands that immediately. It changes sleep, swimming, meals on deck and the relationship between the yacht and the bay it is sitting in.
A technical claim becomes persuasive when it improves the day rather than the emissions calculation.
The published figures are still the builder’s figures
GX Superyachts has stated that the hybrid system delivers up to 100 nautical miles of electric running at six knots, publishes a maximum range of 11,571 nautical miles at the same speed, and says the batteries and solar can carry hotel loads at anchor for at least 48 hours without a generator. Launch reporting gives Merinos a maximum speed of 16 knots and a cruise of 12.
All of it needs qualification.
Range, battery endurance and generator use depend on speed, sea state, temperature, hotel load, air-conditioning demand, battery condition and how many people are on board. A figure achieved at six knots describes almost nothing about a passage at cruising speed.
Sea trials have started. Independent consumption data has not been published. Monaco will show a finished yacht, not an operating history.
The launch proves GX can build the boat. The season has to prove how close real use comes to the specification.
The interior is built for long stays, not photographs
Merinos sleeps ten guests in five cabins.
The owner’s suite sits on the main deck and opens onto a private foredeck terrace. A full-beam VIP on the lower deck has a fold-down balcony, and three further cabins complete the accommodation.
Outside there is a large upper deck with dining, lounge seating, a bar, sunbathing space and a Jacuzzi. At the stern, fold-down sections extend the beach club, served by a hydraulic swim platform.
The layout does not try to turn every deck into a reception room. It favours long periods on board, easy movement between inside and outside, swimming access, and a family group that can spread out without breaking into separate camps.
Casali’s interior uses walnut, leather, lacquer and stone with curved architectural details. Large windows cut the sense of enclosure, and the restrained palette is meant to stay liveable over weeks rather than perform for the first photoshoot.
Monaco is the first real examination
Merinos is scheduled to appear at the Monaco Yacht Show, 23 to 26 September, at Port Hercule.
The show expects around 120 superyachts by opening day, a large share of them 2026 deliveries. Merinos arrives into a crowd of new boats rather than a stage of her own.
That is useful. Owners, brokers, captains, naval architects and rival yards can compare build quality, engineering access, finish, deck circulation and machinery-room execution across the same four days.
The hybrid system will draw the attention. The yacht will still be judged on noise, vibration, service routes, storage, crew operation, stability and the quality of the joinery. Technical ambition buys no exemption from ordinary superyacht standards.
What is still unconfirmed
- the delivery date after trials and outfitting;
- verified consumption and range in normal cruising;
- the price;
- whether Merinos will ever go on the charter market;
- the owner’s cruising programme;
- long-term servicing for the hybrid and battery systems.
GX Superyachts confirmed in 2025 that the first yacht had been sold to a European owner, so this is not a speculative build waiting for a buyer. A second GX42 has been reported in the order book for 2027, which suggests the yard intends a repeatable series rather than a single technical demonstrator.
Luxury.it perspective
Merinos is interesting because her best luxury feature may be an absence.
Less generator noise at anchor photographs badly. It also improves nearly every hour spent on board, which a glass pool does not.
GX Superyachts still has to prove the numbers at sea and show that a hybrid system stays manageable across years of ownership, not one summer.
The launch is the threshold that matters. The brand has moved from ambition to a 42.1-metre yacht heading for Monaco under her own name.
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