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Sea Eagle II: The inside story of the world’s largest aluminium sailing yacht

Yachting World

  • June 17, 2020

Rupert Holmes talks to the build and design teams behind the 81m Royal Huisman flagship Sea Eagle II, which recently completed her sea trials off the coast of the Netherlands

Royal Huisman has an enviable track record of producing superlative sailing superyachts , with hundreds of projects completed to date. Yet the latest vessel to leave the shipyard is extraordinary even by these standards. She is the world’s largest aluminium yacht and is one of the top ten biggest sailing yachts ever built. 

Sea Eagle II is a magnificent 81m/266ft three-masted Panamax schooner, created by the same Dykstra and Mark Whiteley Design collaboration that produced the stunning 56m/186ft Royal Huisman ketch Aquarius just over a year ago. 

Her very experienced owner has sailed all his life and spent a lot of time at sea. “ Sailing around the world in the weekends is a phrase often used to outline his days on board,” says Royal Huisman project manager Arjo Spans. He is also a repeat client – the original Sea Eagle is a 43m/143ft Frers/Rhoades Young design launched by the Dutch yard in 2015. 

worlds-largest-aluminium-sailing-yacht-81m-royal-huisman-sea-eagle-II-launched-aerial-view-credit-Tom-Van-Oossanen

Sea Eagle II is due to be delivered to her owner in July 2020. Photo: Tom Van Oossanen

Initially the brief for the new boat was for a more classical yacht, similar to the 79m/259ft three-masted gaff schooner Athena , which Royal Huisman built for Silicon Valley mogul Jim Clark in 2004. However, the owner quickly realised he would prefer a more modern yacht: a fast-looking hull shape with straight lines, long waterline and plumb bow. The concept of Sea Eagle II was born. 

“Having worked with him to build the original Sea Eagle , we understood the owner’s priorities from the start,” says Spans. “These are: low maintenance, functionality, and safety, including ease of moving around the yacht, even when heeled at sea.

“For each of the key aspects of the boat he asked for three proposals, he would then choose one of them and leave us to implement it,” Spans adds. “He put a huge amount of trust in the shipyard and in our craftsmanship.”

Article continues below…

3 masted sailing yacht

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royal-huisman-116-power-cat-concept-aerial-view

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The scale of this yacht is nothing short of astounding. The sleek hull lines belie the 4m/13ft freeboard and the two-tier deckhouse, including a half-raised bridge, looks entirely in proportion. The main deck-level accommodation has a huge expanse of glass, with the 360º view interrupted only by minimal mullions. There are also acres of cockpit space, with room left over for a long sweep of uncluttered aft deck.

Mark Whiteley was responsible for developing the interior and refining the exterior styling. He created a simple and modern style for the interior, with straight lines. Lacquered Alpi walnut wall panels, brushed natural oak floors and dark stained wenge trims are complemented by light colour leather handrails and upholstered wall panels.

Part of the brief was for the yacht to be able to host business meetings – the forward part of the superstructure therefore includes a large saloon with expansive seating, plus a 16-seat table for formal dining.

worlds-largest-aluminium-sailing-yacht-81m-royal-huisman-sea-eagle-II-launched-aft-deck-credit-Rondal

The largest winches are capable of a tremendous 18-tonne pulling load. Photo: Rondal

A technical challenge 

Dykstra Naval Architects drew a narrow and efficient hull shape with a maximum beam of only 12.4m/40ft, while displacement has been kept down to a relatively light 1,050 tonnes at full load. The final shape was achieved following extensive computational flow dynamics (CFD) calculations, velocity prediction programming (VPP), and testing in both tow tanks and wind tunnels. These all helped to determine sail balance, keel position and predicted rudder angles.

The plumb bow is balanced by a modest, but graceful, stern overhang, with a contemporary, relatively wide transom at deck level. Twin knuckle lines extend aft from near the bow, merging into one amidships and then forming a chine aft. Right aft the hull has negative curvature on the flare below the chine, which gives interesting reflections in the gleaming paintwork.

The lead naval architect, Dykstra’s Erik Wassen, told me he introduced the knuckle lines to give the hull “a bolder and more interesting shape.” The owner liked the concept and Mark Whiteley helped to refine the detail. Wassen describes the underwater shape as being: “a very modern round bilge shape, with a nice slender hull that gives good sailing capabilities.” Appendages are a conventional fin keel and balanced rudder.

worlds-largest-aluminium-sailing-yacht-81m-royal-huisman-sea-eagle-II-launch-hull-credit-Priska-van-der-Meulen

Photo: Priska van der Meulen

The latter presented an interesting technical challenge, according to Wassen. Initially they looked at fabricating the rudder stock in steel, but that alone would weigh three tonnes. Screening a number of alternatives led to a decision to use carbon for the stock, with a foam core section clad in a relatively thin composite skin for the blade. 

The result is what it’s producer, Royal Huisman’s sister company Rondal, believes to be the biggest ever carbon rudder, weighing only 1,250kg, which helps to keep weight out of the ends of the boat. The weight saving here also enabled the intended fore and aft trim to be achieved with the ballast in its optimal location.

The rudder includes load sensors to record and verify torque, side forces and bending moment while sailing. “There is not much load data available for rudders of this size of sailing yacht, so it’s very conservatively engineered,” says Spans. Fibre-optic sensors are incorporated to enable a database to be created that will help with designing future composite rudders for very large yachts.

Due to the distance of the helm stations from the rudder, the steering is via an electric-hydraulic system, which means there’s no feedback from the helm. The plan is to investigate whether data from the sensors can be used in a feedback system to give a more natural feel to steering the boat under sail. 

Structural engineering

This is one of the most interesting elements of yacht design, yet is all too often under appreciated. Extensive modelling showed a couple of unexpected problems that needed clever solutions during Sea Eagle II ’s design and engineering. 

Instead of the hull flexing smoothly under load, like an I-beam, the presence of a forward intermediate deck introduced hard spots in this area, resulting in stress concentrations at the forward end of the superstructure. This required a lot of design work to create a smooth transition of stress from the lower deck to the intermediate one and then on to the upper deck.

worlds-largest-aluminium-sailing-yacht-81m-royal-huisman-sea-eagle-II-cad

Structural engineering was extensively modelled for Sea Eagle II

The roof of the superstructure also posed a challenge, in that the inside surface of a beam needs to become shorter as it flexes. But the original plan for the aluminium roof wasn’t able to accommodate this, with the result the modelling showed stresses concentrating in the corners of the mullions and in the glass itself. 

The solution was to avoid welding the top of the mullions to the roof, opting instead for a flexible joint that allows for movement when necessary. Wassen likens it to the joints in large buildings that need to be included to allow for thermal expansion and contraction.

Whiteley also helped to refine the exterior styling. In addition to the detail of the knuckles, his input helped to refine the shapes – particularly curves and softening corners – in the superstructure.

worlds-largest-aluminium-sailing-yacht-81m-royal-huisman-sea-eagle-II-launched-rigging-detail-credit-Crea-Fragma-Rondal

COVID-19 restrictions meant her delivery date had to be pushed back by 3 months. Photo: Crea Fragma / Rondal

Panamax rig

The requirement to be able to clear the Bridge of the Americas at the Pacific end of the Panama canal called for the schooner rig with three equal masts. All are of carbon and are made by Rondal, with integrated sail handling systems and Carbo-Link carbon standing rigging.

Each mast has in-boom furling, while the aft two have staysails for use when reaching. The tank and wind tunnel testing was used to verify different headsail options, particularly to determine the differences between a large blade jib versus a large staysail or yankee.

“Obviously you have better windward performance with a large blade,” says Wassen, “but as soon as you bear away the yankee is much more forgiving in trimming, so we decided that made more sense.” A further advantage is that when the yankee is part furled the sheeting point remains the same. 

worlds-largest-aluminium-sailing-yacht-81m-royal-huisman-sea-eagle-II-launched-mast-detail-close-up-credit-Rondal

Rondal’s Integrated Sailing System consists of the three carbon Panamax masts with furling booms, hydraulic boomvangs, headsail furling systems, deck winches and equipment, captive winches and continuous solid carbon standing rigging by Carbo-Link, all equipped with load sensing capabilities. Photo: Rondal

In addition, a blade jib requires much higher sheet loads to maintain leech tension. Even though Sea Eagle II is a three-masted yacht, the yankee sheet loads are still predicted to reach 18 tonnes – but this still allows standard-size captive winches to be used, rather than larger custom-made units.

The Panamax limitation obviously poses the question as to whether sail area needed to be compromised to fulfil this criteria. However, this is clearly not the case for Sea Eagle II . Hull speed is close to 20 knots and the yacht is clearly capable of surfing at much higher speeds, despite being designed as a pure cruiser. This role, of course, suggests keeping heel angles to a maximum of 10-15°. 

Nevertheless, the VPP figures suggest potential boat speeds of 17-18 knots in 16 knots of true breeze with a true wind angle of 70°. “As soon as you can ease the sheets a little bit, we have a lot of sail area,” says Wassen, “so on a beam reach, I wouldn’t be surprised if a steady 20 knots is possible.” 

Specification

LOA: 81m (266ft) Air draught: 62m (205ft) Hull: Aluminium Guest accommodation: 11 Crew accommodation: 14 Exterior styling: Dykstra Naval Architects and Mark Whiteley Design Naval Architecture: Dykstra Naval Architects Interior design: Mark Whiteley Design Classification: Lloyd’s MCA (LY-3)

First published in the April 2020 edition of Supersail World.

Welcome aboard the sailing yacht Atlantic

All about one of the most awesome classic yachts of all time, the three mast schooner Atlantic. Long time holder of the world record for the crossing of the Atlantic Ocean under sail, this one hundred and eighty-five foot schooner originally designed by William Gardner in 1903 has been relaunched and is sailing once more.

The Atlantic is currently in the western Mediterranean, and available for luxury sailing yacht charters.

Schooner Atlantic luxury yacht charter Unicorn logo

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3 masted sailing yacht

Iconic yachts: The story of the 88m sailing yacht Maltese Falcon

Tom Perkins created one of the most sensational three-masted sailing yachts of the past 100 years when he built the 88 metre Maltese Falcon with Perini Navi .

Launched in 2006, the project took nearly six years to complete. With radical unstayed masts made of 'weapons-grade' carbon fibre, computerised sail and mast control system, M a ltese Falcon, and in particular its FalconRig, was hailed as a triumph of design, development and engineering.

The great idea of the clipper rig is that a huge sail area, 2,415 metres square, in this case, can be spread over 15 sails, thus greatly reducing the loadings. On Maltese Falcon there are a total of 25 sails, giving her 10 spare.

One of the most exciting aspects of Maltese Falcon is the yacht's upwind performance. "We sail as close to the wind as any yacht, of any design, that has more than one mast," Perkins previously said. He went on to describe the mast and sail control system as 'almost trivial' in its simplicity. "I can teach any sailor how to handle the yacht in five minutes," he said. "To the best of my knowledge, this is not the case with any other big boat with reel winches."

The superyacht's 'luxury machine' interior - a marriage of industrial chic and high tech - was designed by Ken Freivokh around Tom Perkins' striking modern art collection , and features leather, glass, wood and steel. The layout includes a master suite and five further guest cabins, and the crew of 16 is accommodated in eight cabins.

Her long and relatively narrow hull was designed be very fast through the water, and her very long waterline 78 metres assures stability against heeling. The sails, made by Robbie Doyle, are stored on individual in-mast mandrels and set and furled using a complex but brilliant system that makes use of a large number of electric motors within the masts and on the yards.

In 2009, Perkins sold Maltese Falcon to hedge-fund manager Elena Ambrosiadou. The yacht is now available for charter with SuperYachtsMonaco from €460,000 a week.

More about this yacht

Similar yachts for sale, yachts for charter, more stories, most recent, from our partners, sponsored listings.

Sandeman Yacht Company

William Gardner 3-Masted 185 ft Topsail Gaff Schooner 2010

yacht

Designer William Gardner
Builder Van der Graaf, Netherlands
Date 2010
Length overall 216 ft 0 in / 65.84 m
Length deck 185 ft 0 in / 56.39 m
Length waterline 135 ft 0 in / 41.15 m
Beam 29 ft 0 in / 8.84 m
Draft 16 ft 3 in / 4.95 m
Displacement 310 Tonnes
Construction Steel hull
Gross Tonnage 268 Tons
Engine Yanmar 6AYM–ETE 555 kW
Location Mediterranean
Price POA

These details are provisional and may be amended

BROKER'S COMMENTS

ATLANTIC was the ultimate classic yacht - winner of everything that was worth winning in her day. This wonderful re-creation by Ed Kastelein is the crowning glory of three such projects he has undertaken. Chartered for the last three years by an important shipping magnate, she is now for sale. This is an absolutely outstanding yacht.

Interested in ATLANTIC in more detail.

Enquire About ATLANTIC Download PDF Specification

Captain's Comments

ATLANTIC has been world cruising since 2014 under Captain Jim Thom. Among countless amazing experiences, he recalls some special moments when her charms and abilities shone through to even the most experienced of captains... “An impression that really stands out was one I and the crew of ATLANTIC had when sailing back directly from New Zealand to Panama: 7000 miles in 31 days. We left in April and sailed south of Easter Island between 35 and 39 degrees, piggy-backing and skirting the low pressure systems as they swept across the South Pacific - a lot of reaching and broad reaching. We weren't racing by any stretch; we were actually sailing very conservatively. At one stage we even had to heave-to for 36 hours because there was no wind: we just parked the boat, 2000 miles from New Zealand and 2000 miles from Easter Island. The albatross that had been following us for the past couple of days also just landed and sat in the water next to us till the breeze came back! “When it did come we really took off, averaging 12 knots for 16 days and that included sailing into the trade winds where they aren't so strong. What ATLANTIC showed us was that with her long, narrow, easily driven hull shape she would just hurtle along. There were days when we were doing 14-15 knots all day. I would come up on deck to see if everything was OK, check the weather, the size of the waves and if the crew were alright. They were a young bunch and I would find them simply chatting away as they steered, talking over their shoulders while driving along. I would say, 'Please just look in the right direction'. But that was the level of confidence they had in this boat. I told them they didn't know how good this was: 'I know you are enjoying yourselves, but this is the sail of my life and the sail of your life as well; you just don't know it yet!' “I went down below to see how everyone was getting on. At this point we were hurtling along in fairly good sized waves, but the guys in the crew mess were watching TV or reading books as if they were home. The boat felt completely solid. That trip to me epitomised what ATLANTIC is. She has these incredibly long legs and this very good sea-keeping hull shape with a beautiful fine entry. She just ate up the miles relentlessly without straining any muscles. That was our strongest feeling of her. "The other abiding sensation of the yacht was of strength. Strength of the hull and strength of the rig. When we had the rig serviced in New Zealand the riggers were amazed at the strength and the redundancy in the rigging. They said the masts were so strong they didn't need shrouds! That they would never come down. And that was our feeling as well when we were sailing. It was all so rock solid. She gives this great sensation of strength and ability, and mile-eating speed, and comfort when you are under sail."

History Notes on the original ATLANTIC

Commissioned by New York Yacht Club member Wilson Marshall, ATLANTIC was launched in 1903. She was designed by William Gardner, one of America's foremost designers of large yachts. From the moment ATLANTIC went to sea, it was clear that she was an exceptionally fast and beautiful schooner. When a yacht in 1903 hits twenty knots during her sea trials, she is a promising yacht, but even then nobody could imagine two years later this yacht would set a record that would stand unmatched for almost a century. Nevertheless, whilst Wilson Marshall wanted ATLANTIC to be the fastest schooner on the water, he felt there was no reason to compromise on comfort. Unlike contemporary racing schooners, ATLANTIC was equipped with every imaginable luxury. Fitted out with the finest mahogany panelling, she had two steam driven generators to power electric lights, refrigerators and a large galley. On deck her halyard winches and primary sheet winches were also steam driven. She had two double and three single staterooms, a lobby, a large full beam saloon, a dining room, a chart & gunroom, three large bathrooms and in the deckhouse there was a comfortable observation room. She had retractable chimneys, so while under sail the below deck steam heating, lighting and refrigeration systems could keep running. ATLANTIC's fo'c'sle accommodated her thirty-nine strong crew and officers, who would live aboard throughout the year. During her first season ATLANTIC proved fast, winning both the Brenton Reef and the Cape May Cup hands down, but it was only in 1905 she made the headlines by winning the Kaiser's Cup, a Transatlantic race from Sandy Hook to the Lizard. Referred to as "The last Great race of Princes", the entries for this race included all the yachts that the rich and powerful from Britain and America could send to sea. The legendary Captain Charlie Barr, who had already successfully defended the America's Cup three times, was hired to skipper ATLANTIC. Charlie Barr's determination to win was as legendary as his skills for driving the largest of yachts to the very limit. And win, he did, sailing 3006 miles in 12 days, 4 hours, 1 minute and 19 seconds. ATLANTIC's 24-hour record was 341 miles, an average speed of 14,1 knots. Uncountable attempts were made to break this record but it would hold firm until 1998, the longest standing speed record in the history of yachting. . ATLANTIC's story continued for another seventy-seven years with ownership passing through the likes of Cornelius van der Bilt and Gerald Lambert. She was used as a mother ship for other racing yachts like Vanity, for America's Cup defenders and the J-Class Yankee on her voyage to England. Her guest book included the rich and famous of the world. Simply put, she is the most famous and beloved racing schooner of all time. Although after World War II ATLANTIC would never sail again, she refused to give up her existence. Somehow she was saved from the scrap yard on three different occasions, broke loose from her moorings, to sail back to sea without a man aboard and ended up used as a houseboat, a restaurant and a floating dock at a fuel station. Finally, on 30th of January 1982, she was broken up at Newport News Boat Harbor, Virginia.

Construction

- Hull by Van Der Graaf BV, Hardinxveld Giessendam, Holland - Classification: Built to Class BV - Compliance: 1 1 charteryacht/s.mach1 + charteryacht/s.mach + MCA - Gross tonnage: 268 - Welded steel hull - Teak superstructure - Teak deck and caprail

Deck Equipment and Ground Tackle

- All custom deck hardware by Absolute Projects, Lisbon, Portugal - All Harken all bronze winches - 6 x B74.3STBBB 3-speed, self-tailing, manual - 2 x B74.2STBBB 2-speed, self-tailing, manual - 10 x B980.2STBBB 2-speed, self-tailing, manual - 4 x B980.3PTBBB EL 3-speed, plain top, electric 400v - 4 x B1111.3PTBBB EL 3-speed, plain top, electric 400v - Windlass Thomas Reid R2262 400V 4-speed with warp capstans - 2 x 600 Kg custom traditional style anchors, 2 x 100 m 24 mm chain and stoppers

Accommodation and Domestic Equipment

General - Teak and mahogany joinery - Accommodation for up to 12 guests - 3 x Double and 3 x twin en-suite staterooms - Mavé air-conditioning system with 2 x 98 k BTU 400V chillers, fan coils with individual temp and speed controls throughout - Crew accommodation for up to 12 From aft - Access from deck to double captain’s en suite cabin to port - Twin guest cabin en suite with upper and lower berths - Access via raised deck saloon to guest accommodation To port - Large owner’s double bed cabin to port en suite with bathtub To starboard - 1 x Guest cabin en suite with upper and lower berths - 1 x Guest cabin en suite with two single berths - Main saloon, full beam - 2 x Double en suite guest cabins with two single berths Crew space forward - Full beam, modern, professional galley - Ironing/laundry/stowage for linen to port - Crew mess to starboard - Six crew cabins sharing two bathrooms. - Siemens galley appliances - All electric, includes 8 rings, two ovens, refrigerators and freezers - Rhima commercial dishwasher

Rig, Spars and Sails

Masts and spars - Nedal BV custom aluminium masts finished in cream Awlgrip - Steel bowsprit finished in cream Awlgrip - Hollow laminated Alaskan sitka spruce booms and gaffs by Ventis Standing rigging - 7x7 galvanised steel by De Ruiter Running rigging - by Lancelin, France Sails by Baltic Sails - Fore and fore-topsail - Main and main-topsail - Mizzen and Mizzen topsail - Staysail - Jib - outer ijb - jib top

Mechanical Electrical and Tankage

Propulsion - Yanmar 20l Diesel main engine 6AYM-ETE 555 kW at 1,840 rpm - Consumption approx 94 kg per hour at rated load - Yanmar reduction gear YXH 240-1, i=3.03 - Vulcan elastic coupling; Polyflex mounts - West Mekan 4 blade variable pitch propeller, 100 EHWS 340 - Halyard wet exhaust system - Technische Bureau Meyer custom hydraulic steering - Veth electric bowthruster VT-80 50Kw Tanks - 2 x Diesel bunker tanks integrated, total 12,000 litres - 2 x Diesel day tanks integrated, total 1,000 litres - Emiliana Serbatoi 24V Diesel lift pump & manual pump - 2 x Fresh water tanks integrated, total 12,000 litres - A.M.F.A. fresh water pump, Duo A95 24 – 400V & 24V - 5 x Thermor ACI water heaters 400V 150l storage type Water systems - Desalator watermaker D200/400 2 total 480 l/hour - 2 x Black water tanks: integrated, total 4,000 litres - 2 x Grey water tanks: integrated, total 4,000 litres - 3 x Integrated grey water sump tanks, total 600 litres Electrical/pumps - AC 230/400 V 50Hz with distributed neutral IT - European Standard - Genset 1: Yanmar 6HAL2-Nx, Stamford UCM274F2 alternator, 115kVA - Genset 2: Yanmar 6CHL-TNx, Stamford UCM224F2 alternator, 50 kVA - Trafotek shore power isolating transformer 3PUK300/330 – 400V 62.5kVA (limited 63A) - Forani & Pecorari bronze centrifugal bilge pump, CM50 400V 5.5kW - Forani & Pecorari engine mounted bronze centrifugal clutch bilge pump, CM50 400V 5.5kW - G&R black & grey water pigtail pumps, MV64 400V - A.M.F.A. Duo A95 24 fresh water pump, 400V & 12/24V DC isolated from hull - Prestolite 24 V 140 A service alternator with Balmar MC624 regulator and isolator - Victron Atlas 24 V 100 A 3-phase service charger with isolator - 2 x Victron Multi+ 24 V inverter chargers, output totalling 120A - 24V 2000 Ah lead-acid traction service (house) battery, est. autonomy 8 hrs - Victron Skylla safety charger 24V 30A - 24 V225 Ah Sealed Lead Acid safety battery, est. autonomy 8 hrs - 24 V 25 Ah sealed lead acid radio battery est. autonomy 8 hrs - Kentec independent addressable fire alarm system (IMO) throughout - Eaton-Moeller bilge alarm system incorporating tank alarms and WTD indicators - A.M.F.A. Marina ZZ 30mm 24V diaphragm sump pumps - 9 x Actana 24V electric toilets with ceramic bowls, fresh water flush

Navigation, Communications and Electronics

- Simrad RA 80 (IMO) colour radar, 6kW - Simrad MX510 (IMO) GPS with MX575A DGPS compass - McMurdo Nav7 GMDSS 3 band Navtex receiver - Simrad Mini-C TT3000 GMDSS Inmarsat (telex/printer/reserve battery) - KVH Trakphone FB250 Inmarsat (tel/fax/internet) - Simrad AI50 Class B AIS - Simrad VHF, RS87, EXB: DSC-D/ATIS (2 station) - Icom water resistant handheld VHF - Simrad IS20 networked indicators, wind, rudder, depth and speed - PC Based chart plotter to compliment Admiralty paper charts - Norselight NLC48 nav lights, backed-up supply, control and alarm - Panasonic KXT616 PABX intercom, extensions throughout vessel - Brother MFC9440 networked laser colour copier/scanner/printer/fax

- 3 x Zodiac 12 person automatic release life rafts - Sillinger 6.5 m RIB with Mercury 115 HP - 2 x Entel HT649 GMDSS VHF portable - Simrad  EG50 AUTO GMDSS EPIRB  with built-in GPS - ACR Pathfinder 3 SART - Fixed fire extinguishing in the engine room including 52l Novec ozone-friendly agent - WD40 50m³/ hour mobile diesel crash pump, couplings and hoses

Contact us to discuss ATLANTIC in more detail.

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These particulars have been prepared from information provided by the vendors and are intended as a general guide. The purchaser should confirm details of concern to them by survey or engineers inspection. The purchaser should also ensure that the purchase contract properly reflects their concerns and specifies details on which they wish to rely.

Sandeman Yacht Company

Brokerage of classic & vintage yachts.

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Koru Charter Yacht

NOT FOR CHARTER *

This Yacht is not for Charter*

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KORU yacht NOT for charter*

127m  /  416'8 | oceanco | 2023.

Owner & Guests

  • Previous Yacht

Special Features:

  • 2nd Largest sailing yacht in the World
  • Built for Amazon founder Jeff Bezos
  • Additional power source from kinetic energy generated by the sails
  • Large swimming pool main deck aft
  • Wealth of toys and accessories
  • 75m (247ft) support vessel ABEONA
  • Innovative kinetic energy recovery system to covert wave-induced motion for sustainable cruising
Sailing yacht KORU offers the last word in innovative design coupled with a wealth of luxurious amenities for the very best sailing experience for her guests.

The 127m (416'8") Oceanco sailing yacht KORU (previously known as Y721) represents one of the largest sailing yachts in the world, with an impressive internal volume of 3,300 GT and wealth of luxurious accommodation and amenities.

Commissioned by entrepreneur and Amazon founder, Jeff Bezos, the 3-masted schooner KORU, known throughout the build as Project Y721 replaces Oceanco’s BLACK PEARL  for second place in the world's largest sailing yacht rankings behind Nobiskrug's 143m (469ft)  sailing yacht A , and operates under the Cayman Islands' flag.

Exterior Design

Reportedly taking its design cues from the 93-meter Lurssen sail yacht EOS, the yacht features a midnight-blue hull with an elongated bowsprit and traditional canoe stern, with classic lines reminiscent of some of the finest schooners in the world. As expected from a tech entrepreneur, known for pushing boundaries and driving innovation, sailing yacht KORU is trialing a prototype for a new kinetic energy recovery system. This is based on a conversion of wave induced motion, heave, pitch and roll into electric energy, with initial tests showing early promise. With a nod to her green credentials, this will provide an additional power source for the yacht allowing for more enhanced sustainable cruising.

Interior Design

Oceanco's newest yacht is understood to have an internal volume of 3,300 GT and will undoubtedly offer a wealth of luxurious accommodation and amenities. Sailing yacht KORU benefits from full-length windows across her superstructure allowing plenty of light to infuse her elegant interiors. 

Guest Accommodation

With her wide beam the 127-meter sailing yacht KORU offers generous accommodation for her guests, equipped with the finest linens and state-of-the-art technology.

Onboard Comfort & Entertainment

Sailing yacht KORU is served by the 75-meter (247ft) Damen support vessel ABEONA  (ex-Wingman). This yacht will be equipped with KORU's larger toys, rumored to include a submarine for thrilling excursions beneath the waves a la Jules Verne, plus a helicopter and landing pad. She is also believed to house an array of PWCs, as well as a speed boat and a luxury car, as well as providing accommodation for additional crew and staff.

Although we have little information about the yacht's features, we do know that she will have an aft dip pool on her main deck, along with a further Jacuzzi on her sundeck and variety of alfresco social spaces. Pictures show that she also has a crow's nest attached to her central mast, offering lofty panoramic views for her more adventurous guests.

Access to sailing yacht KORU will be via folding side passerelles, discreetly hidden in the yacht's hull on either side. Rescue and work tender launches will likely take place further forward, as per regulations. Recent pictures show a large hatch opening in her lower deck aft, which may contain further tenders and toys, but may also double as a beach club. 

Performance & Range

KORU is a 3,300 GT sailing yacht, built with a steel hull and aluminium superstructure, with teak decks. She was built to Lloyds Register ✠ 100A1 SSC Yacht Mono, G6, ECO(IHM) ✠ LMC UMS classification society rules.

Length 127m / 416'8
Beam 16.8m / 55'1
Draft 4.3m / 14'1
Gross Tonnage 3,493 GT
Cruising Speed 15 Knots
Built
Builder Oceanco
Model Custom
Exterior Designer Dykstra Naval Architects
Interior Design Mlinaric, Henry & Zervudachi

*Charter Koru Sail Yacht

Sail yacht Koru is currently not believed to be available for private Charter. To view similar yachts for charter , or contact your Yacht Charter Broker for information about renting a luxury charter yacht.

Koru Yacht Owner, Captain or marketing company

'Yacht Charter Fleet' is a free information service, if your yacht is available for charter please contact us with details and photos and we will update our records.

Koru Photos

Koru Yacht

Koru Awards & Nominations

  • Yacht Style Awards 2024 Superyachts over 80m Nomination

NOTE to U.S. Customs & Border Protection

Specification

S/Y Koru

Length 127m / 416'8
Builder
Exterior Designer Dykstra Naval Architects
Interior Design Mlinaric, Henry & Zervudachi
Built | Refit 2023
Model
Beam 16.8m / 55'1
Gross Tonnage 3,493 GT
Draft 4.3m / 14'1
Cruising Speed 15 Knots
Top Speed 17 Knots

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Shenandoah of Sark

The 1902 classic 3-masted sailing yacht.

3 masted sailing yacht

YACHT SPECIFICATION SHENANDOAH OF SARK

3 masted sailing yacht

AUXILIARY MACHINERY & ELECTRICAL SYSTEM

Tank capacities (approximate), ancillary equipment, communication equipment, navigation equipment.

3 masted sailing yacht

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3 masted sailing yacht

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3 masted sailing yacht

Three-masted barque

  • Related ships

Robust and original

The three-masted Artemis is an astonishing example of nautical tradition. The ship was built in Norway in 1926 for whale fishing. Later on it was used as a cargo ship between Asia and South America.

The Artemis is sailing since 2001 on the North European waters to honour the glory of the Dutch sailing fleet! The Frisian Tall Ship Company bought the Artemis at the end of the last century and built it with a lot of love and a sense of detail back into a stunningly sailing ship. Now she crosses the seas to historic port cities or to one of the many nautical events.

Robust and original, that is the appearance of the Artemis. At the same time, the ship offers high comfort and luxury. It is precisely this combination that makes the ship unique and loved by international events and sea voyages. The barque has an attractive maritime salon with bar and a small hotel kitchen.

The Artemis can accommodate up to 120 people. Her guests can look forward to experienced and enthusiastic service staff and excellent catering. And of course, on a great nautical experience aboard on this unique three-master with a driven sailing crew, the most modern navigation equipment and fully prescribed safety equipment for the big voyage.

Welcome to the rich history of the Dutch sailing heritage. Welcome to the Artemis!

De masten van de Artemis staan vol in de zon en wind

the Netherlands

Speed under sail

Construction year

Visited sail amsterdam

Minerva vaart door de zee met een schip op de achtergrond

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3 masted sailing yacht

3 Masted Schooner

3 masted sailing yacht

Schooner – a sailing vessel with fore and aft sails on three masts. The foremast being shorter than the mainmast which is no taller than the mizzen mast. Originally gaff rigged, nowadays many carry bermudan sails.

In the photos above the Camper & Nicholson Schooner Creole , due to her sail configuration, is known as a staysail schooner, whereas Adix and Shenandoah are both gaff schooners.

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COMMENTS

  1. Top 10 largest sailing yachts in the world

    Maltese Falcon was built for the late American venture capitalist Tom Perkins.The iconic three-masted schooner is the fifth-largest sailing yacht in the world. Maltese Falcon's rig is made up of three unstayed, 'weapons-grade' carbon fibre masts, with a fully computerised sail and rotating mast system. The system has been dubbed a triumph of design, development and engineering and Maltese ...

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    The World's Largest Sailing Yachts might seem diminutive when compared to the record breaking, ... Launched in 2006 by Lürssen, a world renown super yacht builder, EOS is a 3-masted, Bermuda-rigged schooner. She has a beam of 13.5 meters (44 feet), a draft of 5.5 meters (18 feet) and weighs in at 1,500 GT. ...

  4. The best pictures of Koru ,the world's biggest sailing yacht

    In 2022, the 125.8-metre sailing yacht Koru made history when she hit the water at Oceanco's Alblasserdam facilities. Now successfully delivered, she is the flagship of the Oceanco fleet and the largest Dutch-built yacht in the world. BOAT rounds up the best pictures of the three-masted sailing yacht owned by Amazon founder Jeff Bezos...

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    Welcome aboard the sailing yacht Atlantic. All about one of the most awesome classic yachts of all time, the three mast schooner Atlantic. Long time holder of the world record for the crossing of the Atlantic Ocean under sail, this one hundred and eighty-five foot schooner originally designed by William Gardner in 1903 has been relaunched and is sailing once more.

  7. Eos (yacht)

    Yacht Eos moored in Dartmouth, UK, Feb. 2008 Eos at the Lürssen shipyard. The Eos is a three-masted Bermuda rigged schooner.The ship is one of the largest private sailing yachts in the world, and as of 2009 was owned by movie and media billionaire Barry Diller, [3] husband of fashion designer Diane von Fürstenberg.According to a 2007 article in Harper's Bazaar, Eos features a figurehead of ...

  8. ATHENA Yacht • Jim Clark $70M Sailing Superyacht

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  9. Iconic yachts: The story of the 88m sailing yacht Maltese Falcon

    Tom Perkins created one of the most sensational three-masted sailing yachts of the past 100 years when he built the 88 metre Maltese Falcon with Perini Navi. Launched in 2006, the project took nearly six years to complete. With radical unstayed masts made of 'weapons-grade' carbon fibre, computerised sail and mast control system, M a ltese ...

  10. John G. Alden 121 ft 3-Masted Gaff Schooner 2021

    View pictures & full details of WOLFHOUND, a 121 ft 3-MASTED gaff schooner classic yacht designed by John G. Alden and available for sale. ... Design #347 is a preliminary design that includes the final lines, two different rig and sail plans (a 2-masted and a 3-masted version), as well as a 3-masted accommodation plan. The 3-masted sail plan ...

  11. ATLANTIC sailing yacht for sale

    2010. Guests. 12 in 6 cabins. Price. POA. The largest three-masted classic racing schooner ever created, ATLANTIC is one of the finest examples of a classic reproduction yacht on the water today. A painstaking recreation of the William Gardner-designed winner of the 1905 Kaiser's Cup, she has been brought up to modern performance sailing ...

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    Sea Eagle II, designed by Dykstra Naval Architects and Mark Whiteley, features an impressive plumb bow and modern Panamax rig by Rondal.With an overall length of 266ft/ 81m, she is the largest yacht built at Royal Huisman's shipyard and joins another Huisman build - Athena - in the top 10 ranking of the world's largest sailing yachts.

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  15. Koru (yacht)

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  21. Artemis

    Robust and original. The three-masted Artemis is an astonishing example of nautical tradition. The ship was built in Norway in 1926 for whale fishing. Later on it was used as a cargo ship between Asia and South America. The Artemis is sailing since 2001 on the North European waters to honour the glory of the Dutch sailing fleet!

  22. 3 Masted Schooner

    3 Masted Schooner. Schooner - a sailing vessel with fore and aft sails on three masts. The foremast being shorter than the mainmast which is no taller than the mizzen mast. Originally gaff rigged, nowadays many carry bermudan sails. In the photos above the Camper & Nicholson Schooner Creole, due to her sail configuration, is known as a ...

  23. Schooner Buying Guide 2024

    Most will classify a ship as anything over 100 feet, and a boat, anything under 99 feet. The newly launched in 2023, 416-foot KORU by Oceanco is currently the largest three masted schooner sailing yacht on the water, while the smallest one can be as small as 18 feet and is classified as a day sailer only. Dona Francisca 2014 172′ CUSTOM Schooner.