Huisman has won a four-crane order from Siem Industries for two offshore subsea construction vessels under construction in China, with deliveries scheduled for 2029 and 2030.
The Huisman crane order covers two 400-tonne knuckle boom cranes with below-deck winches and two 50-tonne auxiliary knuckle boom cranes. Each vessel will receive one crane of each capacity, with both specified by Siem Industries as active heave-compensated (AHC) subsea cranes.
The equipment will be manufactured at Huisman‘s production facility in Zhangzhou, Fujian Province, while the vessels are being built at Fujian Mawei Shipbuilding in Fuzhou, China.
According to Huisman’s official announcement on 29 October 2026, the 400-tonne cranes will have a maximum lifting capacity of 400 tonnes in a single-fall configuration and a hook travel of up to 3,000 metres for deepwater operations.
The main cranes will feature full-load AHC using Huisman‘s proprietary secondary controlled drive system. This configuration is designed to compensate for vessel movement during offshore lifting operations.
The 400-tonne units will also feature a high-lift mode for raising heavy loads to greater heights. According to the manufacturer, the design allows large objects to be lifted at the crane’s full rated capacity with the knuckle extended.
Additional features include Huisman‘s fifth-generation motion controller for lifting accuracy and a LiDAR-based active collision avoidance system.
The manufacturer also lists load peak shaving and lift-off boost modes, which are intended to extend the cranes’ operational weather window.
For electrical operation, the cranes are designed to reduce power fluctuations on the vessel’s grid. Huisman also specifies compatibility with electrical power grid solutions and an eco-mode operating function.
The award follows Siem Industries‘ order for two offshore subsea construction vessels, announced on 26 October 2026.
The vessels were designed by Sirius Design & Integration in cooperation with Siem Industries and Fujian Mawei Shipbuilding. Each vessel will measure approximately 145 metres in length and 27 metres in beam.
According to Siem Industries, the design focuses on operational flexibility and energy efficiency, with the vessels intended to support a range of offshore construction and subsea activities across the energy sector.
Huisman chief executive David Roodenburg described the contract as a continuation of the company’s longstanding business relationship with the Siem companies.
The two vessels are scheduled for delivery in 2029 and 2030, respectively.
