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    Wärtsilä transverse thrusters WTT

    Transverse thrusters provide a side force that supports mooring operations and station keeping. Wärtsilä WTTs deliver superior hydrodynamic performance for high thrust - diameter ratio.

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    Wärtsilä transverse/tunnel thrusters WTT

    Transverse thrusters, also known as tunnel thrusters, bow thrusters or stern thrusters, provide a side force, or transverse thrust, to support mooring operations or station keeping.

    Wärtsilä WTTs have compact dimensions, yet they deliver high thrust. They are available in a range from 400 kW to 5500 kW and are an excellent choice for ships such as:

    • merchant vessels
    • cruise vessels
    • offshore support vessels 
    • offshore construction vessels.

    In auxiliary applications, transverse thrusters support the mooring or harbour operations of merchant cargo vessels. 

    When applied in Dynamic Positioning systems, transverse thrusters extend the DP capability of, for example, offshore supply vessels.

    Key benefits

    • Superior hydrodynamic performance for high thrust - diameter ratio
    • Robust, reliable and maintenance friendly design
    • Easy installation; high level of integration
    • Maintenance friendly design
    • Wärtsilä ProTouch controls with ergonomic levers and intuitive touch screen displays or push-button panels
    Access 3D models & drawings

      Application

      • Wärtsilä transverse thrusters are available in a range from 400 kW to 5500 kW for applications in numerous types of ships, including merchant vessels, cruise vessels, offshore support vessels, and offshore construction vessels.
      • Transverse thrusters, also known as bow thrusters, stern thrusters or tunnel thrusters, provide a side force, or transverse thrust, to support mooring operations or station keeping.
      • Transverse thrusters are available for auxiliary or AUX usage, which is mostly applicable with merchant vessels to support harbour manoeuvring and mooring operations. Where the transverse thruster is part of a dynamic positioning (DP) system, the rating for DP use applies.

      Merchant

      • Cost per kW - 15% reduced cost (CAPEX) per kW*
      • Environmental compliance - Compatibility with environmentally acceptable lubricants (EAL) - Ensures compliance with environmental regulations such as US EPA VGP2013 and DNV CLEAN DESIGN
      • Smaller footprint - Integrated hydraulics and fine filtration ensures longer lifetime for gear, bearings and other rotating components
      • User centric interface - ProTouch control system - bus connections for simplified installation and integration with other equipment control, monitoring and alarm systems 
      • Global support - Service and delivery available when and where you need it
      • Reliability - Robust design for reliable operations in demanding environments and low operational cost
      • Experience - over 1,250 Wärtsilä Transverse Thrusters delivered or on order in the Merchant segment, of a total of 3,250 units
      • Flexible Options – WTT are available in CPP and FPP giving you the option to select the right system to meet your needs.

      *Compared to a standard Wärtsilä Transverse Thruster with the same propeller diameter. The improvement may vary depending on configuration, fuel, vessel and currency.

      Options

      • Controllable or fixed pitch propeller upto WTT-40 type; CP propeller for WTT-45 and CT3500 types
      • Manoeuvring (AUX) or Dynamic Positioning (DP) application
      • Redundant pumps and/or lubrication filters
      • Compatible with environmentally acceptable lubricant (EAL) for EPA VGP 2013 compliance or CLEAN notation compliance
      • Face type seal or Air barrier seal for WTT-21 and up
      • Tailor-made tunnel with tunnel ends cut according to hull form and additional circular or longitudinal stiffeners
      • L-drive with intermediate shaft and separate E-motor foundation
      • De-mountable, low noise, horizontal drive variants
      • Package with electric motor and starter

      Technical info

      Range and dimensions

       TypeElectrical Frequency (Hz)
      		 Input Speed (rpm) 
      		 Maximum Power 1Propeller Diameter (D) (mm)
      		Length (L) 
      (mm) 
      		 Weight 2
      (kg)
        
      		Manoeuvring
      AUX/Merchant (kW)       		  Dynamic Positiong
      DP (kW)      		   
      CT/FT125 H 60
      50      		1780
      1480      		610
      510      		600
      500      		125015502800
       CT/FT150 H60
      50      		1780
      1480      		880
      735      		780
      650      		150018004150
       WTT-1160
      50      		1180
      980      		1100
      1100      		1000
      1000      		175019705750
       WTT-1460
      50      		1180
      980      		1450
      1450      		1300
      1300      		200021958000 
       WTT-1660
      50      		1180
      980      		1650
      1650      		1490
      1475      		2200211510100 
       WTT-2160
      50      		1180
      980      		2100
      2200      		1825
      1825      		2400227512000
      WTT-2460
      50      		880
      980      		2600
      2600      		2150
      2150      		2600 239013900
       WTT-2860
      50      		 880
      735      		3000
      2800      		2400
      2400      		2800297020200
      WTT-3260
      50      		710
      735      		3300
      3300      		2800
      2800      		3000 328525400
      WTT-3660
      50      		 710
      735      		3600
      3600      		3200
      3200      		3200/3300 335029400/29700
      WTT-4060
      50      		710
      735      		4000
      4000      		3600
      3600      		3400352032800
      WTT-4560
      50      		710
      735      		4800
      4800      		4050
      4050      		3600 380040400
      CT350060
      50      		590
      590      		5500
      5500      		5000
      5000      		4000  430063700 
      1 Maximum power level is valid for uni-directional rotation. Depending on propeller type and class society, lower power levels may apply.
      2 Version with CP propeller including a standard tunnel with E-motor support., excluding E-motor.

      Weights and dimensions

      WTT-weights-and-dimensions

      Power range

      WTT-power-range
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