Schottel hybrid drive for new LNG tugs

The new tug, designed by LMG Marin, is the first of a series of 12 destined to replace Sembcorp Marine’s diesel fleet and will begin operations in late 2021.

The tug will need highly variable power ranges for its future operation in the harbours of Singapore. Depending on the desired operating mode and the required propulsion power, the hybrid drive system activates the appropriate power source or both together.

In terms of thruster integration, each upper gearbox offers two power input positions with an offset angle of +/- 90° for two power sources. An option with a +/- 135° offset angle is also available.

Sembcorp Marine’s hybridised Schottel RudderPropellers type SRP 430 will have a power intake capacity of around 2,000 kW each which will be fed by zero emissions electrical motors and/or low-emissions LNG main engines. The 360° steerable propellers combine maximum manoeuvrability and a high bollard pull as harbour operations require.

The Schottel SYDRIVE-E azimuth thrusters are engineered and manufactured in Germany. Commissioning and after sales service will be provided by Schottel Far East, Singapore and the fleet will be operated by Sembcorp Marine subsidiary Jurong Marine Services.