In operation, it functions as an azimuth thruster and is designed to develop maximum bollard pull in the manoeuvring condition, or to provide positioning power for station keeping.
The thruster has the added safety benefit of functioning as a «get you home» drive. A high thrust is developed in relation to input power, and this thrust can be vectored in any desired direction.
In the stowed position the thruster does not protrude below the vessel’s keel/ baseline, an important consideration for shallow water operations.
Additional azimuth thrusters are often located at the lowest possible position in the hull due to space envelope restrictions, especially for equipment mounted at the bow, and thrusters need to be retracted into the hull when not in use.
Features
- Space saving installation, no protrusion from keel
- Operates as azimuth or side thruster
- Diesel or electric drive
- Available with CP or FP propellers
What next...
Technical data for combined azimuth/side thrusters and swing-up thrusters
| Technical data | TCNS 073 | TCNS 092 |
| Input speed (rpm) | 1500 | 1800 | 2000 | 1500 | 1800 |
| MCR (kW) | 736 | 880 | 1000 | 1650 | 2000 |
| Propeller diameter (mm) | 1800 | 2200 |
| Weight thruster w/steering gear | 9500 | 16000 |
| Weight hull module | 9000 | 17000 |
All data subject to change without prior notice.
What next...
- Tankers
- Cargo vessels
- Cruise ships/ferries
- Arctic vessels
- Drilling rigs
- Various types of naval support vessels
What next...
In the retracted position, the thruster can be operated as a side force thruster. The upper part of the thruster is hinged, enabling the thruster to be lowered through an arc into its azimuthing position or retracted into a recess where it lies horizontally in the hull.

The thruster is 360 degrees rotatable and swings up into a shallow recess in the hull bottom. The Rolls-Royce thruster is designed as a nozzle propeller in lowered as well as retracted position. This means low noise and higher thrust compared with a traditionaltunnel thruster.
The combi thruster version is comprised of an equivalent standard swing-up unit installed in a specially designed hull module.
When in swing-up position (retracted) the steering gear may be rotated so that the propeller unit is used as a transverse thruster. Speed of response in terms of changing thrust direction is similar to conventional thrusters.
The steering unit can be rotated through 180° in some 10 seconds. The combi thruster is delivered with remote control system.
Key features
- Available in CP and FP propeller
- Electric or diesel drive
Two operation modes
- 360° rotatable as azimuth
- Side thruster when retracted
Typical applications
- Offshore supply/service vessels
- Offshore production vessels
- ROV/survey support ships
- Tugs
- Fishery research vessels
- Various naval support vessels
What next...