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Thursday, September 3, 2020 

German propulsion company Schottel has been awarded a contract to supply a total of eight propulsion units to the Turkish Atlas Shipyard, for two Anchor Handling Tug Supply (AHTS) vessels, ordered by the Russian company Polar & Polus (affiliates of ARK Shipping and Adamant) and intended for operations in the Caspian Sea.

The ships will be equipped with ice-strengthened controllable pitch propellers and transverse thrusters from Schottel. The two AHTS vessels – named Polar and Polus – will both be driven by three Schottel SCP 65 4-XSG CP Propellers, each with an input power of 1,740W. These propulsion systems, featuring a propeller diameter of 2.1m and an optimsed 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 70t.

Schottel says its CP propeller systems are characterised by high performance in terms of propulsion efficiency and bollard pull. The SCP is designed to be both robust and user-friendly, with minimal maintenance and long service life. The flexibility of the SCP allow the propulsion power to be optimally adapted to the required operation profiles of the Russian AHTS vessels at all times. In order to achieve maximum manoeuvrability, these new shallow-water vessels will each be fitted with a Schottel STT 1 FP Transverse Thruster of 400kW. These bow thrusters will provide dynamic positioning to DP 1 standards.

To withstand the harsh conditions of the Caspian Sea, the propellers will be ice-strengthened according to Finnish-Swedish Ice Class 1A Super. The minimum draught of approximately 2.5m enables them to operate in shallower parts of the Caspian Sea.

Ark Shipping & Adamant, a Russian group of companies performing river and sea transportation, will take ownership of the vessels. The main functions of the 73.3m long and 16.9m wide 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 intended to serve as Emergency Response and Rescue Vessels (ERRVs) as well as transportation. Both vessels are set to be completed by the end of 2021.

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