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Friday, April 10, 2020 

Designer Robert Allan Ltd (RAL) says that its RApport 2500 tug 'Hercules', built by Diversified Marine of Portland, OR, has now entered service with Crowley Maritime Corporation in Seattle.

This latest incarnation of the RApport 2500 design is an evolution of a series that is said to have been a West Coast standard for nearly 20 years – compact, flush-decked and cost-effective ASD tugs developed specifically for ship assist work.

Capable of escorting and berthing the largest ships calling on West Coast ports, the 24.99m long and 12.19m wide tug sets out to be both powerful and simple in design, which concentrates on manoeuvrability and visibility. It features accommodation for up to six personnel, while a high-performance Markey winch ensures optimal control of the ship while connected to the tug.

Propulsion is provided by Caterpillar, with two CAT 3516E main engines rated for 3004 bhp at 1800 rpm driving MT627 thrusters with 2.7m FP propellers, connected by carbon fibre shafts. The vessel was designed to ABS class rules and 46 CFR – Subchapter M regulations. On trials, the tug achieved 89t bollard pull ahead, 87t astern, and a free running speed ahead of 12 knots.

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