Yenicay 1 – First RAscal 1800 for Sanmar

February 26, 2015

The Yenicay 1 is the first of the new RAscal 1800 series of ASD tug designed by Robert Allan Ltd. and delivered by Sanmar to their own fleet in Turkey in January, 2015. The RAscal 1800 is a big sister to the RAscal 1500 delivered by Sanmar in 2014 to Norwegian clients and shares a common hull form style, wheelhouse, and general layout. Both are built to extremely high standards, almost yacht finish, and are fitted with Caterpillar engines and Veth Z-drives. However, the RAscal 1800 has considerably more power, speed, and bollard pull. It is capable of ship assist work, line-handling, general harbour service, and coastal towing. Ship assist work is generally done over the bow whereas general towing can be done over the bow with the winch or over the stern with either the winch or a towing hook.

Particulars of the Yenicay 1 are:

The tug was designed and constructed to ABS requirements with the notation:

Major tank capacities are as follows:

On trials Yenicay 1 met or exceeded all performance expectations with a bollard pull of 31 tonnes and a free running speed of 12 knots.

Noise levels were extremely low at 63 dbA in the wheelhouse, 60 dbA in the galley/mess, and 60 dbA in the crew cabins. These low noise levels were achieved by using the carefully engineered combination of resiliently mounted engines, light weight composite shafting, high attenuation silencers, resiliently mounted fans, visco-elastic floor treatment, and judicious use of sound insulation.

The vessel has been outfitted to the highest standards for a normal operating crew of four. Two cabins are located in the foc’sle, along with a galley, mess, and WC with shower.

The deck machinery comprises an electric powered DMT TW-E 100 kN ship assist hawser winch on the bow and a tow hook aft. The tug can tow over the bow as well as over the stern with the single hawser winch. A hawser duct runs under the wheelhouse to facilitate this, and both the bow and stern are fitted with large stainless steel fairleads for the towline.

The wheelhouse is designed for maximum all-round visibility with the control station providing maximum visibility to both fore and aft deck working areas.

Main propulsion is comprised of a pair of Caterpillar C32 diesel engines, each rated 970 kW at 1800 rpm, and each driving a Veth VZ-900 fixed pitch Z-drive unit in ASD configuration. Propellers are 5 bladed 1700 mm Kaplan type in nozzles.

The electrical power is provided by two Caterpillar C4.4 diesel generators, each with an output of 86 ekW.

Ship-handling fenders at the bow consist of a single 500 x 250 cylindrical fender at the main deck lever, with 300 mm W fenders between the main deck and the knuckle. A 300 x 300 hollow “D” fender provides protection at the main and foc’sle deck sheer lines and around the stern.

A second RAscal 1800 is nearing completion at Sanmar in March 2015. Both tugs will operate in the Harbour Fleet of Sanmar for ship berthing operations in Petkim Port, Nemrut Bay, Turkey.

Sanmar is also working on a high powered version of the same RAscal 1800 with bigger Caterpillar 3512 engines which will give an increased bollard pull of 40 tonnes.

For more information on the Yenicay 1 or any of the RAscal Class tugs, or on any other vessel designs developed by Robert Allan Ltd., please contact design@ral.ca.