Schottel to propel Russian AHTS

Two anchor handling tug supply vessels, ordered by the Russian company POLAR LLC & POLUS LLC, intended for operations in the Caspian Sea, will be equipped with ice-strengthened controllable pitch propellers and transverse thrusters from Schottel.

The vessels, named Polar and Polus, will be driven by three propellers type SCP 65 4-XSG, each with an input power of 1,740 kWh. These propulsion systems, featuring a propeller diameter of 2.1m and an optimised hub for full feathering mode, are powered by diesel engines. Designed by V Denge Technology, the new vessels will be able to achieve a free sailing speed of 12 knots and an expected bollard pull of 70 tonnes.

In order to achieve maximum manoeuvrability, these new shallow-water vessels will be fitted with Schottel Transverse Thruster type STT 1 FP (400 kW) bow thrusters providing full dynamic positioning to DP 1 standards.

Ice-strengthened according to Finnish-Swedish Ice Class 1A Super, the main functions of the 73.3m by 16.9m vessels will be to haul, lay, retrieve and lift the anchors of semi-submersible drilling platforms or pipe-laying vessels. In addition to this they will be able to tow drilling rigs, lighters, other vessels and floating facilities. They are also intended to serve as emergency response and rescue vessels as well as supply transports.