Page 57: of Marine Technology Magazine (January 2015)

Rope Luf? ng Crane and a traditional Knuckle Boom Crane,

MacArtney for Chinese Research Vessel offering a low overall construction weight, high lifting height

MacArtney delivered and large capacity at outreach. a MERMAC R40 RA winch to the Hunan Uni- versity of Science and

Flexible Control from Rexroth

Technology, Xiangtan,

Rexroth has developed a

China. The order was re- new control solution that alized in cooperation with is suitable for both simple (Photo: Geotek)

SeaTech China in its role and complex winch and as exclusive MacArtney crane drives. Designers product and system representative on the Chinese market for can generate new systems underwater technology. The winch was procured with support quickly and ? exibly with from the 863 state high tech research and development plan it. The control system and will be installed onboard the RV Ke Xue (pictured), an from Rexroth can easily advanced multi-purpose research vessel in China. The sup- be connected to the customer’s system using prede? ned inter- plied MERMAC R40 RA winch is among the ? rst electric faces. Numerous hardware variants in the form of an extensive driven winch systems with AHC to enter service in China. The modular system allow the designer maximum ? exibility and purpose of AHC is to keep a load, held by a vessel, motionless reduce costs and errors during commissioning by means of with regards to seabed, independent of the wave motion, al- a simple “plug-and-play” interface. In the software, for ex- lowing operators to sustain subsea equipment operation, even ample, the designer can access standardized modules for con- during adverse weather conditions and higher sea states. AHC trol functions. Integrated security features ensure compliance is enabled by using the data from a motion reference unit to with the required safety level. The modular structure of the detect vessel displacement (heave, pitch and roll). A control software makes using the control system very ? exible, in both unit on the winch system then calculates and executes the ac- simple and complex applications. Modi? cations, enhance- tions necessary for the winch system to respond to- and com- ments, and the interface to the customer’s system can be tested pensate for the movement.

and adjusted by the designer directly on a test stand provided.

Huisman for Maersk Subsea Vessels

In December 2014, Huisman won a contract from COSCO (Dalian) Shipyard for the delivery of four customized 400mt

Rope Luf? ng Knuckle Boom Cranes and two 100mt Knuckle

Boom Cranes onboard four new subsea support vessels (SSVs) for Maersk Supply Service. The ? rst vessels, Marin Teknikk design MT 6027, are scheduled for delivery in Q4 2016.

The contract between COSCO (Dalian) Shipyard and Huis- man contains an optional scope for two 400mt Rope Luf? ng

Knuckle Boom Cranes for two additional vessels. Huisman’s sister company SMST will deliver the two 100mt Knuckle

Boom Cranes with options for four more cranes. The compo- nents for the four Rope Luf? ng Knuckle Boom Cranes will be built at the Huisman facilities in China, the Netherlands as well as in Czech Republic. They will be transported to the COSCO Shipyard in Dalian, China for ? nal installation, commissioning and testing onboard. Huisman said the new patented Rope Luf? ng Knuckle Boom Crane is especially designed for subsea in- stallations in increasingly deeper water and offshore construction in severe weather conditions. The active heave compensated (AHC) cranes combine (Photo: Huisman) the bene? ts of a normal www.marinetechnologynews.com

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