In 2017, Wärtsilä received an order for the engines and steerable thrusters for two new tug boats operated by the Turkish Directorate General of Coastal Safety. The first vessel "Kurtarma 11” came into operation in the Turkish waters on the Bosphorus Strait of Istanbul in February 2019 and the second will "Kurtarma 12" enter service in April 2019. The vessels were built in Eregli under project management by the Yutek shipyard and site team.
The bollard pull rating for the tug boats has been certified by the Turkish Lloyd classification society as being an outstanding 75 TBP. Bollard pull is the conventional measure of a vessel’s pulling power. This exceptional performance is achieved through the combination of a 6-cylinder Wärtsilä 26 engine and a Wärtsilä WST-24 steerable thruster, controlled by a Wärtsilä ProTouch propulsion remote control system. To achieve 75 TBP, an 8-cylinder engine would normally be required, and by reaching this level of pulling power with fewer cylinders has a positive impact on both Capex and Opex costs.
The Wärtsilä Steerable Thruster (WST) has been developed in parallel with the latest operating demands for tugs, river-going vessels, and various offshore support vessels. The aim, as with all Wärtsilä products and solutions, is to ensure optimal efficiency, high hydrodynamic performance, less maintenance and better accessibility for serviceability. With eight thruster types, ranging from 700 to 3200 kW, the WST enables these vessels to meet and exceed the performance levels required for today’s competitive operating environment.