![2024 06 24 Olympic Boreas Yno 318 CR ULSTEIN 5](/imager/images/References/169908/2024_06_24-Olympic-Boreas-Yno-318_CR-ULSTEIN-5_c36ea0a7a48d13e5607f2ed20023a877.jpg)
![TWIN X-STERN, an ULSTEIN SX222 below view](/imager/images/Illustrations/63940/SX222_below_view_9c86a9026d28745fb551d23753ab0d7b.jpg)
TWIN X-STERN®
The TWIN X-STERN® is the latest addition to the innovative designs of X-BOW® and X-STERN® that enhance fuel efficiency and operability. Its unique features distinguish it from others, and its exceptional quality lies beneath the waterline.
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The game-changing advantages of TWIN X-STERN
Navigate the maritime frontier with TWIN X-STERN. Merging innovative design with eco-efficiency, it's the choice for forward-thinking shipowners.
- Enhanced fuel efficiency
- The TWIN X-STERN design, building on the legacy of the X-BOW® and the X-STERN®, offers improved operability and fuel efficiency, driving down operational costs.
- Sustainability edge
- With increasing emphasis on zero-emission marine operations by 2050, the TWIN X-STERN provides an eco-friendly approach, positioning shipowners and operators at the forefront of sustainable marine innovations.
- Unmatched operability
- The unique dual stern and bow design with main propeller units at each end ensures smoother motions, higher comfort, and increased operability, making it a preferred choice for complex marine operations.
- Superior manoeuvrability
- The TWIN X-STERN's innovative combination of thrusters and hull design offers enhanced manoeuvrability and the ability to maintain position effectively, which is vital for wind farm operations.
- Noise & energy savings
- This innovative design ensures a quieter operation for increased onboard comfort and leads to significant energy savings during operations, directly benefiting the environment and operational costs.
- Weather-Adaptive Performance
- With the TWIN X-STERN's excellent performance in either direction, there's no need to constantly adjust the ship's direction in response to changing weather.
![SX222 ULSTEIN v2 Nov22 Sea SB Fore](/imager/images/Vessel-Designs/1879/SX222-ULSTEIN-v2-Nov22-Sea-SB-Fore_c36ea0a7a48d13e5607f2ed20023a877.jpeg)
It's a 'win-wind' situation
As a shipowner or operator, there is a need to think about the lowest possible life cycle cost in the fleet. Cost-effectiveness related to fuel consumption has always been a concern for the shipowner. Still, there is also a growing unease concerning the environmental consequences—the commitment to achieve zero-emission marine operations by 2050 sets a new standard. Older vessels need to be upgraded, and new ships must be designed with a more sustainable approach.
Delivering on emission goals becomes a more significant criterion when contracts for wind farm operations are tendered. The TWIN X-STERN might be the competitive edge you need as an operator to win market shares in the offshore wind industry and take a sustainable responsibility. It's a 'win-wind' situation.
![TWIN X-STERN, an ULSTEIN SX222 below view](/imager/images/Illustrations/63940/SX222_below_view_3d56a3406a971d2257b1e82c5e6a7d54.jpg)
How to get a competitive edge
Standards and demands for efficiency, safety and green responsibility are changing, and marine operations are becoming increasingly complex. Keeping pace under such conditions can be demanding.
The TWIN X-STERNhas several characteristics, but the easiest way to describe it is as a ship with two sterns and main propeller units at each end.
The combination of thrusters and hull design results in lower energy consumption and reduced motions, and therefore, higher operability and comfort.
This concept dramatically improves manoeuvrability, motions and ability to stay in position. Qualities that make the TWIN X-STERN ideal for wind farm operations. Further, the concept allows for reduced noise, more comfort on board and the potential to save significant amounts of energy in operation.
By having excellent performance in either direction, you avoid having to turn the ship to follow weather changes.
According to the Commercial Director at Ulstein Design & Solutions, Lars Ståle Skoge, the TWIN X-STERN has considerable efficiency potential. A ship has to follow the weather when in operation, and turning the ship is traditionally required up to 50 per cent of the time. And this is where the TWIN X-STERN excels. By having excellent performance in either direction, you avoid having to turn the ship to follow weather changes.
TWIN X-STERN references
TWIN X-STERN stories
![2024 06 24 Olympic Boreas Yno 318 CR ULSTEIN 7](/imager/images/News/2024/169959/2024_06_24-Olympic-Boreas-Yno-318_CR-ULSTEIN-7_842a067f8292d132742e75517c7be97a.jpg)
Olympic Boreas CSOV – delivered and ready for offshore energy operations
The state-of-the-art 'Olympic Boreas' CSOV has been delivered to Olympic by Ulstein Verft on 25.07.2024. The vessel is the first of two sister vessels, based on the ULSTEIN SX222 design by Ulstein Design & Solutions AS.
![TWIN X-STERN, an ULSTEIN SX222 below view](/imager/images/Illustrations/63940/SX222_below_view_04d7d64faa982f5604458fe1630332ce.jpg)
Subsea and cable-laying: The next frontiers for the TWIN X-STERN
Aptly nicknamed ‘A 4-wheel-drive for the seas’, the ULSTEIN TWIN X-STERN is celebrated for its exceptional manoeuvrability. To date, this innovative feature has been incorporated into ten newbuilds, all designed for the walk-to-work market and measuring up to 90m in length. The next likely segments to adopt the TWIN X-STERN are subsea and cable-laying.
![03 06 24 318 Olympic boreas WEB 8897](/imager/images/News/2024/164888/03.06.24_318_Olympic_boreas_WEB-8897_2a1b0ce5c36cae953c32909d831b01f7.jpg)
Successful sea trial of the first CSOV for Olympic
10 June 2024: Yard number 318 from Ulstein Verft completed her sea trial this weekend. The state-of-the-art CSOV vessel includes sophisticated energy systems and the ULSTEIN TWIN X-STERN solution in a prototype combo.
![03 06 24 318 Olympic boreas WEB 8812 3 16 9](/imager/images/News/2024/166189/03.06.24_318_Olympic_boreas_WEB-8812_3_16-9_7aa11bbebba29c8c38cbea9dcd7fa9e9.jpg)
"Olympic Boreas" CSOV nominee for 'Ship of The Year 2024' Award
The Construction Service Operation Vessel (CSOV) "Olympic Boreas", set for delivery from Ulstein Verft in 2024, has been nominated for the 'Ship of The Year' award by the jury of the maritime magazine Skipsrevyen.
![Steel cutting yno 322 JP Morgan 6 cropped](/imager/images/News/2024/164300/Steel-cutting-yno-322-JP-Morgan-6-cropped_3d59ab31975ef59f39b7dbdabd77f8ab.jpg)
CSOV steel cutting ceremony for Ulstein Verft's yard number 322
Starting its journey from the drawing board to reality: On Thursday, 16 May 2024, the steel cutting ceremony was held at the Crist hull yard for Ulstein Verft's yard number 322. The CSOV vessel is based on a TWIN X-STERN platform and has been designed by Ulstein Design & Solutions AS.
![Ulstein Olympic Utdocking web 3](/imager/images/News/2024/150720/Ulstein_Olympic_Utdocking_web-3_a401ef1376ead2ee0975b3bd10f561c0.jpg)
Launch of first Olympic CSOV
On Saturday, 6 April, the CSOV Olympic Boreas was launched from the dock hall at Ulstein Verft, Norway. The vessel is based on the novel TWIN X-STERN solution, a '4-wheel-drive' solution for the seas.
![NB321 3569 steelcutting](/imager/images/News/2024/135099/NB321-3569_steelcutting_b3ecfea16a77a57bbe972b9c2f30e5cc.jpg)
Milestones for Bernhard Schulte Offshore CSOVs
The two Ulstein-designed CSOV newbuilds under construction for Bernhard Schulte Offshore have reached important milestones. The steel cutting and keel laying ceremonies for yno 321 and 320, respectively, were arranged at the Crist hull yard, Poland, on 30 January 2024.
![ULSTEIN SX222 CSOV design for J.P. Morgan](/imager/images/News/2024/128612/ULSTEIN-SX222-JP-Morgan-x4-web_a401ef1376ead2ee0975b3bd10f561c0.jpg)
Ulstein Verft: Two offshore wind farm CSOV newbuild contracts with J.P. Morgan
Ulstein Verft will construct two CSOVs based on the ULSTEIN SX222 design. The contracts have been entered into on behalf of institutional investors advised by J.P. Morgan Asset Management and include two additional options.
![Acta Marine Yno 1123 2](/imager/images/News/2023/142865/Acta-Marine-Yno-1123_2_a401ef1376ead2ee0975b3bd10f561c0.jpg)
Number 3 and 4: Keels laid for Acta Marine's CSOVs
Acta Marine’s TWIN X-STERN CSOVs reached a new milestone on 26 September 2023, when the keels of the last two vessels in the series were laid at the Tersan Shipyard.
![BS Offshore opts for two newbuilds of the ULSTEIN SX222 design](/imager/images/News/71486/BS-Offshore-opts-for-two-newbuilds-of-the-ULSTEIN-SX222-design_a401ef1376ead2ee0975b3bd10f561c0.jpg)
Ship newbuildings: BS Offshore orders two CSOVs from Ulstein
Bernhard Schulte Offshore returns to Ulstein Verft for the design and construction of two Commissioning Service Operation Vessels (CSOVs) of the ULSTEIN SX222 design. The contract includes options for four additional vessels.
![E book](/imager/images/Illustrations/65280/e-book_c357556ff2efea571a1e0db5c5b39a5c.png)
TWIN X-STERN E-book
In the e-book you can dive into topics such as:
- What is the ULSTEIN TWIN X-STERN?
- How does it work?
- What are the application areas?
And much more.
Redefining maritime efficiency
Experience transformative maritime efficiency with Ulstein's designs. We're setting new benchmarks in sustainable seafaring excellence by bridging fuel optimisation with heightened comfort and safety.
X-BOW®
The ULSTEIN X-BOW®, the inverted bow concept, redefined marine engineering. The bow concept was launched in 2005, together with the first shipbuilding contract, and gained immediate interest from shipowners. The X-BOW hull line design has been tried in most weather conditions.
X-STERN®
The X-STERN introduces the documented X-BOW® effect to the aft ship, harnessing the benefits of improved safety for crew and equipment, increased flexibility in operations and reduced fuel consumption.
TWIN X-STERN®
The TWIN X-STERN® is the latest addition to the innovative designs of X-BOW® and X-STERN® that enhance fuel efficiency and operability. Its unique features distinguish it from others, and its exceptional quality lies beneath the waterline.