Irish operator powers up with Cummins

The first of the two vessels, the Mainport Cedar, has now been delivered while the sister ship, Mainport Pine, will deliver later this year. Wartsila Ship Design of Singapore designed the 54.6m by 13.8m seismic support vessels.

Main engines for the vessels are a pair of Cummins QSK60M-MCRS IMO Tier II. Each engine produces 2,200 bhp at 1800 rpm and turns a four blade Berg Propulsion controllable pitch propeller through a Twin Disc MGRP1817VC gearbox with a 7.59:1 ratio. This power will give the vessels a speed of 12 knots and a 53 ton bollard pull.

Each vessel is fitted with three 360eKW, 50 Hz main gensets that are powered by three Cummins KTA19D(M) engines. A Cummins 6CTA8.3DM engine powers a 135eKW emergency genset. A 300eKW 50 Hz shaft alternator driven by a PTO on the gearbox can generate additional electric power. All engines were supplied by Scott and English Malaysia. Each vessel is also fitted with an electric bow thruster.

The vessels each have accommodation for 50 crew and passengers. Tankage includes an 80m3 urea tank and a 20m3 sludge tank. Each ship’s total fuel capacity is approximately 1,100 MT. The Mainport Cedar and the MainportPine are built to BV class. Both vessels will work with one of the major seismic acquisition companies for the next seven years.