Cat® Marine Engines Power Pair of Tugboats 




Eastern Shipbuilding Group Inc. of Panama City, Fla., recently delivered the first of two 80’x38’x13’2” 5,100 hp Z-drive tugs, the C.D. White and launched a second, A. Thomas Higgins, for New Orleans-based Bisso Offshore LLC, a division of E.N. Bisso & Son Inc.

The two new RAL RApport 2400 Z-drive steel-hull, shiphandling tugs have been customized by the designer, builder, and owner to provide specific operational features including a high bollard pull forward and aft, enhanced maneuverability and escort performance, better fuel economy, crew comfort, safety under the new Subchapter M requirements, and reduced emissions that meet EPA Tier 4 emissions standards. Both tug designs were created by Robert Allan Ltd. of Vancouver, Canada.

Main propulsion is provided by two Cat® 3512E Tier 4/IMO Tier III marine propulsion diesel engines, producing 2,549 hp each at 1,800 rpm, connected to twin Kongsberg/Rolls-Royce US205 P20 Z-drives. During testing, bollard pull was measured at 67.5 short tons (stern pull) and 65.2 short tons (bow pull).

On deck are a Markey Machinery DEPCF-42 HS single drum, 40-hp render/recovery, line tension display, electric escort hawser winch, a Markey CEPB-40 5-hp tow bitt capstan, and a Washington Chain & Supply 90-ton SWL electric-air remote control, manual or remote release tow hook.

Capacities include 28,000 gal. of fuel oil, 8,750 gal. potable water, and two 850-gal. urea tanks.

Dating to 2007, the tug operator has taken delivery of four previous modern Z-drive ship assist tugs from Eastern.

Colin Macpherson, executive vice president of E.N. Bisso & Son, expressed their customers’ positive onboard reactions and being very impressed with each vessel’s construction quality and ongoing maintenance.

The vessels received Workboat’s recognition, “10 Significant Boats of 2020”

For more information about power for your tugboat fleet or any other marine vessels, please contact your local Cat Marine dealer.




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