SOLUTION / PUBLIC SOURCE RECORD
TWIN X-STERN from Ulstein provides fuel savings and maximum manoeuvrability
- Published 29 June 2022; updated 30 September 2026; estimated reading time 3 minutes. Marked available; listed under Offshore wind / Operation and maintenance, Maritime / Ship design and ship’s equipment, and Energy.
- Ulstein’s TWIN X-STERN hull has two sterns and main propellers at each corner, allowing vessels to manoeuvre and hold position in rough seas without turning to follow weather changes. The article says the concept is commercially available on service vessels, including offshore-wind turbine service/maintenance vessels. Related features include walk-to-work (W2W) ramps, cranes and a propulsion concept.
- The page says Ulstein’s earlier X-STERN hull can require up to 60% less power than traditional designs, based on industry feedback. It separately describes TWIN X-STERN as providing significant energy savings, but does not quantify that model’s savings. Reduced wave motion is presented as improving crew comfort/safety and reducing vibration impacts on equipment. These are vendor claims, not independent comparative results in the article.
- The article says Ulstein introduced X-BOW in 2004 and TWIN X-STERN in 2015. It cites historic shipping-emissions and offshore-wind market projections; the USD 1 trillion offshore-wind outlook by 2040 was a cited forecast.
- Linked to SDGs 7 (Affordable and clean energy) and 9 (Industry, innovation and infrastructure).
- Contact: Kolbjørn Moldskred, Sales Manager, kolbjorn.moldskred@ulstein.com. Company: ULSTEIN DESIGN & SOLUTIONS AS, Osnesvegen 110, 6065 Ulsteinvik, Norway; ulstein.com. A phone-number reveal control is present.