Sanmar and Marintug invested in newbuild tugs with conventional propulsion to a new design from Robert Allan for operations in the Gulf of Izmit, located east of the Sea of Marmara, and Antalya Port in southern Turkey
Tug owners are currently handling approximately 10,000 ships annually in these ports. They turned to Sanmar Shipyards for tugs built to the new Bozcay-series of harbour tug, which is based on Robert Allan’s RApport 1900-SX design. The twin-screw harbour tugs are designed for general harbour and coastal towing duties.
So far, six have been built for Sanmar and Marintug’s fleets, including the Yalova tugs.
Bozcay tugs have an overall length of 19.3 m, moulded beam of 8 m, moulded hull depth of 3.5 m and navigational draught of 2.8 m.
Robert Allan said these wider beams “provide better stability” for the power these tugs muster from the conventional twin-screw propulsion. They also have four rudders and greater visibility from the wheelhouse.
Bozcay tugs have a bollard pull of up to 33 tonnes, derived from propulsion that includes two 970-kW Caterpillar C32 engines which turn two 188-cm diameter, four-bladed propellers through ZF 3761 6:1 reverse and reduction gears and stainless steel shafts with diameters of 17.5 cm. Twin high aspect ratio rudders are fitted behind each propeller nozzle.
Robert Allan said these RApport 1900-SX design tugs have “large aft facing windows in the wheelhouse and low-profile funnels” enabling tug masters to view the towing equipment and critical areas of the aft deck.
Access to the engineroom for service and retrofits is through a shipping hatch located between the funnels, which are large enough for removing a main engine.
Standard fendering includes 300-mm D-shaped fenders at the sheer areas of the hull and vertical W-shaped fenders around the bow.
Deck equipment includes a 45-tonne tow hook on the aft deck for general towing duties, while owners can also opt for an electric or hydraulic towing winch.
Sanmar introduced a new breed of tug designs earlier in 2020 as it discontinued construction of three iconic designs – Sanmar, Dogancay and Ulupinar harbour and coastal towage tugs.
Tug design and smart operations and propulsion technology will be highlighted during Riviera’s Webinar Week and virtual conference series in over the next six weeks and in Q1 2021 - use this link to access more details and register for these events