The Wärtsilä Retractable Underwater Mountable Thruster (WST-RU) has been designed to meet the needs of large offshore vessels (OCVs) as well as semi-submersible rigs and drill ships.
With the power output of 5500kW it is typically designed for vessels that require thrusters that can be retracted during transit or while entering shallow waters. The thrusters can be mounted or de-mounted while the vessel is afloat. Additionally, the ability to retract and deploy the thruster enables an increased level of operational flexibility.
The thrusters feature a unique combination of retractable and underwater mountable functionality. The reliability of the thrusters is the result of robust drive line components, including the gears and bearing and the steering system. The thrusters are equipped with Wärtsilä Oceanguard anti-pollution face type seams, primarily due to their extended operating life in the challenging environments where these thrusters will operate and VGP 2013 compliance.
The eight degree tilted propeller shaft solution is a feature of the Wärtsilä Underwater Mountable Thruster that reduces the interaction between the thrusters and hull significantly, thereby enhancing the dynamic positioning performance of the vessel.
In combination with Wärtsilä PCMS (Propulsion Condition Monitoring Service) downtime and maintenance costs can be minimized.