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Monday, August 19, 2019 

PaxOcean Shipyard has delivered the dual fuel ship-handling tug 'PSA Aspen', a Robert Allan Ltd (RAL) RAmparts 2800-DF design, to PSA Marine, Singapore.

The PSA Aspen is the first dual fuel tug to enter service with PSA Marine in the Port of Singapore and the first RAL-designed dual fuel tug to enter service in Asia.

The cooperation between RAL and PSA Marine began in 2002, with the design of Z-Tech tug series. Since that time the two companies have developed a close, cooperative working relationship, providing high quality custom-tailored tugs for the international market. There are more than two dozen of RAL Z-Tech, RAmparts and RAstar tugs in the PSA Marine fleet currently.

Main propulsion for the tug comprises a pair of Niigata 6L28AHX-DF main engines, each rated at 1618 kW at 750 rpm, driving a straight-line steel shaft system to a Niigata ZP-31 Z-Peller propulsion unit with a 2,200 mm diameter fixed pitch propeller and zero to idle slipping clutch. The main engines attain IMO Tier III emission requirements while operating in Gas Mode, and IMO Tier II emission requirements while in Diesel Mode. The engines transition seamlessly between gas and diesel operation and back.

The 25 m3 vacuum insulated IMO Type C LNG storage tank and fuel gas system was provided by Gloryholder Liquefied Machinery with integration of main engine and fuel gas system completed in cooperation with Niigata.

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