How do you store compressed liquid hydrogen on a superyacht at the equivalent of minus-423 degrees Fahrenheit?

This was the toughest question Dutch builder Feadship faced as it set out to create Project 821, the world’s first hydrogen-cell superyacht. “The aim has been to develop a new, clean technology not just for this project, but for the world,” says Jan-Bart Verkuyl, Feadship director and CEO at Royal Van Lent Shipyard.

Hydrogen fuel cells offer great promise for combustion-free cruising, with only electricity and water as their byproducts. But unlike with vehicles and spacecraft, the technology is new to recreational yachts. Weight isn’t the problem because hydrogen is light, but safely storing it on a vessel requires a double-walled cryogenic tank in a dedicated room. According to Feadship, it takes eight to 10 times more space to store hydrogen than the energy equivalent in diesel fuel.

Project 821’s size, at 390 feet long, made it a good candidate to test the technology. The tank on board holds about 4 tons of hydrogen, with the system able to provide a week’s worth of silent operation at anchor, or navigating at 10 knots while leaving harbors or cruising in protected marine zones.

All of that was achieved in addition to the kind of luxury that Feadship clients demand. The yacht’s design is by RWD, with owner representation by Edmiston. It has the most hull openings of any Feadship to date, with 14 balconies. Guest amenities include an elevator and a library.

“We have now shown that cryogenic storage of liquefied hydrogen in the interior of a superyacht is a viable solution,” Verkuyl says. “Future innovations on fuel cells and onboard reforming of methanol to hydrogen are on the near horizon.”

New Horizons

There were no regulations for hydrogen storage and fuel-cell systems on a superyacht, so Feadship, along with Edmiston and Lloyd’s Register, developed appropriately scaled equipment, protocols and safety regulations as part of the build.

Record-Setter

Project 821 is also the largest motoryacht ever launched in the Netherlands. It is about the same length as Feadship’s Launchpad, but with 30 percent more volume.

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Alia Yachts in Turkey is planning for the debut of its all-aluminum, fully custom, 148-foot yacht SAN at the Monaco Yacht Show at the end of September.

SAN is designed by Sinot Yacht Architecture & Design, with naval architecture by Lateral Naval Architects. Power is courtesy of Volvo Penta and a quad setup of IPS drives.

According to the Alia shipyard, SAN has a fully open main deck from the stern to the bow, framed by sole-to-ceiling glass windows with sliding doors forward and aft.

“This design offers an unparalleled sense of openness and a seamless connection to the sea,” the yard stated in a press release. “SAN integrates indoor and outdoor spaces harmoniously, allowing for a straight walk from aft to forward and providing panoramic views through the expansive glass around the salon.”

Exterior deck furniture is designed to be multifunctional, so owners and guests can use it for any variations they want during dining, cocktails or sunbathing. Additional space can be found for relaxing far aft by lowering the bulwarks to expand the sunbathing area.

Belowdecks are four guest staterooms along with the owner’s stateroom.  

“SAN is a striking and innovative superyacht that highlights our strengths as a truly custom builder,” Gökhan Çelik, president of Alia Yachts, stated in the press release. “It’s projects like SAN that attract the best clients from all over the world, reinforcing our reputation as a leading custom yacht builder.”

Where is SAN right now? According to the shipyard, the yacht has completed sea trials and been delivered to its owners. Look for SAN to appear at the Monaco Yacht Show at the end of September.

Take the next step: go to aliayachts.com

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Dutch yacht and superyacht builder Holterman Shipyard recently debuted its Xtreme X-65 model at the Hiswa te Water boat show in Lelystad, Netherlands. The yacht will soon be delivered to its new owner for cruising in Northern European waters and Norwegian fjords.

According to an emailed news release from Holterman, the X-65 boasts steel construction for its hull and supestructure, spacious storage areas, innovative exterior elements and an interior featuring a double-height lower salon-cum-office. Its interior layout –tailored to its owner’s requests– includes a split-level living area and aft galley equipped with seating. 

A roomy dining area at main deck level overlooks an atrium-style lower salon with an office area and TV lounge. The centerline helm sits at the forward end of the salon and overlooks the lower lounge. Additionally, the lower salon’s TV lounge converts into an extra double berth to accommodate extra guests.

“The owner really wanted that lofty lower saloon area where he could have an office for work – the plan was that he could work while cruising and as a result extend his trips and cruises on the boat,” said exterior designer Bernd Weel in the release.

Bernd Weel Design is the studio behind the design of all Holterman’s Xtreme range of yachts. Trimm Design was responsible for the X-65’s naval architecture and Kitty van der Kamp worked on the yacht’s interior design.

Bernd said in the release that the X-65’s design was inspired by similar Xtreme models. The long glass recess in the hull and superstructure are very similar to those found on the X-78, and the line of the top on top of the bulwark is similar across all Xtreme models.

The X-65 has an adaptable layout and is highly customizable. The rest of the lower deck is split between a grandiose full-beam master stateroom with an en suite head amidships and a generous forward VIP stateroom with access to a second head and shower.

An aft garage, comparable to the yacht’s larger siblings, creates a stowage area for electric scooters, bicycles, water toys and other gear and equipment. The foredeck has seating and a dinette, plus forward-facing seats that convert to a sun pad. 

The X-65 has twin 300 hp Volvo-Penta D6 diesels engines and is reportedly capable of 12-knot top hop. The vessel has an 18-foot-4-inch beam, a 4-foot and about an 88,620-pound displacement.

The X-65 blends luxury and performance to be capable of tackling ambitious long-range cruising adventures.

 “He had a dream to cruise the Norwegian fjords, and for that you need a really robust boat, which the 65 is – she has a steel, round-bilge hull, which is not only incredibly strong but which also offers a low center of gravity which means she will be a very stable and comfortable boat,” Weel said.

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Ocean Alexander debuted its Puro series earlier this year at the Palm Beach International Boat Show with the line’s first model, the 35P. The 35-meter yacht was designed in collaboration with Italian designer Giorgio M. Cassetta and naval architect Andrea Agrusta of NavalHead, also in Italy.

Puro is one of four series that the builder offers, and Ocean Alexander says it wanted this line to have global appeal. Hence, the yacht has a number of options and features that can allow owners to customize the way it looks, and that can be used differently in various destinations or cruising scenarios worldwide.

Multifunctional features on the foredeck include a hot tub with a lounge pad whose center section slides on tracks, allowing it to be used as a sun pad and U-shaped settee. Alfresco dining is on the bridge deck and in the cockpit, giving owners and guests multiple options for making the most of the view in any anchorage or underway.

Raising the transom door reveals a seaside sunken beach club with direct access to the hydraulic swim platform, along with lounge seating and stowage. Owners can choose to have a traditional tender garage instead.

Interior styling options include two palettes: the warmer Nautique style that evokes a sense of comfort with mahogany finishes and light neutral tones, and the tranquil Sereno, which has more gray tones.

Furniture placement helps define the salon’s social zones, with an L-shaped settee and square coffee table to port, positioned across from a sofa to create a conversation space. Formal dining is forward with an oval table. Up a level, the Sky Deck has an L-shaped settee to port and a bar to starboard, as well as a day head forward.

Accommodations include a main-deck master along with four staterooms belowdecks for eight guests. The two VIP staterooms are amidships to port and starboard, each with queen-size berths and en suite heads. The forward two en suite guest staterooms mirror each other with side-by-side twin berths that convert to queens.

Power for the 35 Puro is a pair of 2,000 hp MAN V-12 diesels, which push the nearly 114-foot trideck motoryacht to a reported 17-knot top speed. Ocean Alexander expects the 35P to have a 2,100-nautical-mile maximum range cruising at hull speed, allowing more than enough distance to explore in style.  

Take the next step: oceanalexander.com

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“The Riva 110 project is a promise of style, design and performance to reach levels never seen before,” Riva says. “Through the collaboration between Officina Italiana Design, the studio founded by Mauro Micheli together with Sergio Beretta, the Ferretti Group Product Strategy Committee, and the Engineering Department, Riva 110 promises to be a magnificent and beautiful flybridge yacht, as well as larger than ever before.”

When Riva introduced its former flagship model the 110 Dolcevita, the builder expanded on the exterior design and flowing lines of the 100-foot Corsaro. Allied Marine currently has Tasty Waves, a 2020 Riva 110 Dolcevita, listed for $10.95 million. 

“[Tasty Waves is] a masterpiece of luxury performance, meticulously crafted for the discerning yachtsman,” Allied Marine says. “This stunning vessel has been kept inside an enclosed building full-time.” 

The flybridge has an open-air after section that has a lounge area set up with an L-shaped settee and two lounge chairs. Forward, under the hardtop, a U-shaped dinette sits to starboard across from a two-stool bar. A companion bench seat forward to port is adjacent to the two-seat upper helm station. 

On the foredeck if one sunpad is not enough there’s a second abaft the first. Aft of the second sun pad is a U-shaped settee in case you’re looking to enjoy cocktails at sunset. 

The cockpit is mostly shaded by the flybridge overhang and has room for up to eight people to enjoy alfresco dining at the U-shaped transom settee and fixed dining table. 

Tasty Waves has a conventional salon, which has the lounge area aft and the formal dining space amidships. The main deck interior is bathed in natural light thanks to nearly sole-to-ceiling windows lining the room. Lounge seating includes a double length L-shaped sofa to port. 

Sleeping accommodations include the main deck master stateroom and four additional staterooms belowdecks. The on deck master has a centerline berth and an en suite head. Amidships, the four en suite staterooms belowdecks split the centerline with two cabins forward and two aft. The three-cabin crew quarters is forward, in the bow. 

Twin 2,638 hp MTU 16V 2000 M96L diesels give this 110-footer a 26-knot top hop and a 23-knot cruise speed. It’s worth noting that the engine warranty was recently extended 36 months, or up to 4,500 hours. 

Some other notable features on board Tasty Waves include: 

• Dual Starlink systems 
• Zero-speed stabilizers
• FLIR night vision camera 
• Yacht Controller
• Backup Viasat system for satellite internet

Where is Tasty Waves located? The yacht is currently lying in Fort Lauderdale, Florida. 

Take the next step: contact the listing agent, William Blackwell, +1 561.789.8617, William.BlackwellJr@AlliedMarine.com 

Quick Specifications

• Length Overall: 110’
• Maximum Beam: 23’10”
• Fuel Capacity: 4,042 gallons
• Draft: 6’6”

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