STT Transverse Thruster

Indispensable for manoevering and dynamic positioning

Transverse thrusters are installed in the bow or stern in order to improve manoeuvrability. Depending on the type of vessel, the range of application for transverse thrusters extends from brief docking and casting-off in ports with a limited number of operating hours every year up to continuous operation under extreme load conditions in demanding offshore applications with dynamic positioning.

Individually tailored configuration

The transverse thrusters are individually configured by SCHOTTEL project engineers to suit the particular application. Light manoeuvring duties allow high specific thruster performance with the propeller running at a peripheral speed of up to 33 m/s. In tough offshore applications, the propellers operate at lower blade tip speeds.

Choice of prime movers

SCHOTTEL Transverse Thrusters can be powered by diesel engines, electric motors or hydraulic motors. Electric motors are included optionally in the scope of supply. The prime mover can be connected either horizontally or vertically and thus incorporated optimally into the naval architectural design. When fixed-pitch propellers are used, electric and hydraulic motors allow the direction of thrust to be reversed. An additional reversing gearbox is required if the thruster is powered by a diesel engine.


The transverse thruster types STT 1 to 5 are available with either fixed-pitch or controllable-pitch propellers. Thrusters with controllable-pitch propellers can be powered in the same way as those with fixed-pitch propellers – however it is not possible to equip a diesel engine with a reversing gearbox in this case.

Optimum design for more thrust

Thrust is the decisive criterion of a transverse thruster. SCHOTTEL therefore attaches great importance to an optimum propeller design that is individually adapted to the vessel geometry in each case. At the same time, the propeller design takes into account any special requirements in terms of noise level that are relevant for the application. A major parameter for the effectiveness of a transverse thruster is the size of the gap between the tunnel and the propeller, which SCHOTTEL has reduced to a minimum on all models.


  • For extreme load conditions, e.g. in the offshore sector
  • For continuous and short-time service
  • Low noise emission
  • Available with either fixed or controllable-pitch propellers
  • Compact design due to horizontal, vertical or inclined arrangement of the power input flange
  • Combinable with diesel, hydraulic or electric drive
SCHOTTEL Transverse Thruster STT
SCHOTTEL Transverse Thruster STT
Brochure Transverse Thruster
The brochure SCHOTTEL Transverse Thruster in pdf for download (5 MB)