Japan

Oshima Shipbuilding Co Ltd

The worlds largest yacht support vessels

SuperYacht Times takes a look at the largest yacht support vessels that are currently in operation from across the globe.

The world’s largest yacht support vessels

World's largest yachts by volume 

SuperYacht Times brings you an in-depth look at 20 of the world’s largest yachts by volume, all exceeding 9,000 GT.


The 20 largest yachts by volume in the world 

<a data-gid="gid://syiq/Company/6616" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Karmarine Shipyard (Company)">Karmarine Shipyard</a> has completed the transformation of the 1982 semi-submersible support yacht AS&nbsp;Super Servant 3, built by <a data-gid="gid://syiq/Company/6615" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Oshima Shipbuilding Co Ltd (Company)">Oshima Shipbuilding</a>.&nbsp; She left the Turkish yard as a “world-girdling” expedition motor yacht with an exterior styled by <a data-gid="gid://syiq/Company/5291" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Bozca Design Ltd (Company)">Bozca Design</a>, an array of standout features and new insignia. <img src="https://photo-assets.superyachttimes.com/photo/216914/image/large-421ef462ee71c88e89274b2f33a0a07c.jpeg" data-gid="gid://syiq/Photo/216914"><a data-gid="gid://syiq/Yacht/11924" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="OK146.0m (479'0&quot;)Oshima Shipbuilding Co Ltd1982">OK</a>, as she’s since been named, is unorthodox, to say the least. She has a length of 146 metres and a beam of 32.01-metres, which is most concentrated on her aft deck that boasts an impressive 3,300 open space. In her previous life, she was used as a ship to transport yachts, hence this large open flat deck. <a data-gid="gid://syiq/Company/6616" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Karmarine Shipyard (Company)">Karmarine Shipyard</a> took full advantage of this deck, as it is not only spacious – providing accommodation for 70 different toys, including a 46-metre sailing yacht, multiple tenders, buggies, amphibious vehicles and a sea plane – but can also be partially submerged. <img src="https://photo-assets.superyachttimes.com/photo/216915/image/large-9dad241a60f86c63ed920ede35a70deb.jpeg" data-gid="gid://syiq/Photo/216915"><a data-gid="gid://syiq/Company/6616" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="Karmarine Shipyard (Company)">Karmarine Shipyard</a> enhanced her internal strength so that <a data-gid="gid://syiq/Yacht/11924" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="OK146.0m (479'0&quot;)Oshima Shipbuilding Co Ltd1982">OK</a> can handle both stern and side loading. Her submerging ability allows her to carry a wide range of tenders and toys, it also allows the vessel to transform into an “island concept”. <img src="https://photo-assets.superyachttimes.com/photo/216918/image/large-f404d9899fe2e64eb1816d04e4ba0d6f.jpeg" data-gid="gid://syiq/Photo/216918">Some of <a data-gid="gid://syiq/Yacht/11924" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="OK146.0m (479'0&quot;)Oshima Shipbuilding Co Ltd1982">OK</a>’s standout features include a glass-wrapped sun deck Jacuzzi, an outdoor cinema, a tennis court and a botanic garden. She also features not one, but four large aquariums. Some of her more practical features include a car ramp, a 40-tonne crane and a vertical wind turbine. <img src="https://photo-assets.superyachttimes.com/photo/216913/image/large-73f750c61f98e2b306202dfe48622147.jpeg" data-gid="gid://syiq/Photo/216913"><a data-gid="gid://syiq/Yacht/11924" href="#managed-by-system" rel="noopener noreferrer" target="_blank" title="OK146.0m (479'0&quot;)Oshima Shipbuilding Co Ltd1982">OK</a> can accommodate up to 20 guests, who’ll benefit from staterooms that have panoramic 360-degree views. <img src="https://photo-assets.superyachttimes.com/photo/216916/image/large-dd5c2b9dcfbe057c82d67dcac3439533.jpeg" data-gid="gid://syiq/Photo/216916">

146m semi-submersible explorer yacht OK

Karmarine Shipyard has completed the transformation of the 146m semi-submersible support yacht OK.