Dann Marine Tug Repowered with Tier 3 Engines

By Alan Haig-Brown
Thursday, May 29, 2014
Photo courtesy of Cummins Power Systems

Dann Marine Towing, LC., is a fifth generation family-owned and operated tugboat company based in Chesapeake City, Md. The model-bow twin-screw tug Sea Coast was built at Rayco Shipbuilders in 1980 and is one of Dann Marine’s 18-tug fleet. She is 65 feet overall with a 24-foot beam and an 8.9-foot draft.  She carries 16,000 gallon fuel and 5,000 gallons of water.

One of many versatile tugs working in U.S. waters of this class, she is registered for Coastwide Unrestricted. She can operate in push-mode with a pair of 20-ton Nabrico deck winches, each loaded with 110 feet of one-inch cable. She can also tow and has a Markey TTC-18 towing winch fitted with 1,000 feet of one-inch cable.

Until recently she was powered by a pair of 700-HP Cats turning into ZF TF4587 gears with 6.458:1 reduction. This May she has undergone a repower with the Cats out and a pair of Tier 3 compliant Cummins QSK19-Ms installed. These modern six-cylinder engines each produce 750 HP at 1800 RPM with a continuous-duty rating. The boat also got new gears with a pair of Reintjes WAF374 having 6.417:1 reduction. The same four-blade stainless steel Rice propellers were maintained.
 

  • Photo courtesy of Cummins Power Systems

    Photo courtesy of Cummins Power Systems

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