Dynamically-positioned, 48,000 DWT heavy lift transport and installation vessel for the offshore wind industry. The design combines the benefits of a semi-submersible transport vessel with a large, 3,000 mt lifting capacity main crane. Can perform heavy lift crane operations with the main deck submerged.

Vessel type

Heavy lift

Built by

China Merchants Heavy Industry (CMHI), China



Owned by

Offshore Heavy Transport AS

Designed by

Ulstein Design & Solutions B.V.

Principal dimensions

216.3 m
56 m
Draught (max):
submerged max 27.6 m
Speed (max):
13 kn
100 POB

Note: Subject to selected variant configuration


Propulsion thrusters:
3 x 5,500 kW
Retractable thruster:
1 x 3,000 kW
Tunnel thrusters (fwd):
3 x 3,000 kW
Liebherr main crane:
3,000 mt
Deck strength:
30 t/m²
Positioning system :
DP 2
Class :

The first vessel (with options for up to another 3 units) will be constructed by China Merchant Heavy Industry (CMHI) and available for construction and installation activities from early 2021.

The vessel’s capabilities match the future requirements of the offshore wind industry, allowing her to transport and install up to 10 x 1,500t ultra-large jacket foundations or 11 x 2,000t XXL monopiles plus transition pieces for the largest anticipated Wind Turbine Generators.

Please contact us for more information

Ulstein Design & Solutions B.V.

Cornerstone Building (6th floor)
Rotterdam Airportplein 32
3045 AP Rotterdam
The Netherlands

Tel: +31 10 475 00 11