On September 1, 2010, Washburn & Doughty Associates, Inc. delivered the Mary Ann Moran, a 121 ft x 36 ft x 18 ft Intercon Tug, to Moran Towing Corporation. Designed by Ocean Tug & Barge Engineering Corp., Mary Ann Moran is the fourth vessel built by Washburn & Doughty to this design and delivered to Moran Towing.
According to the vessel’s captain, Mr. Jake Jarrell, “I can say that this boat is by far one of the best vessels I have ever had the pleasure of working on in over 30 years in the industry. I was very impressed with the professionalism and quality of the workforce at Washburn & Doughty and the end result of their product.”
The vessel is surveyed by the American Bureau of Shipping and classed A1 Towing Service and AMS, with an international load line. The vessel complies with all applicable SOLAS regulations.
Mary Ann Moran admeasures 264 gross tons (US regulatory tonnage) and 689 gross tons (International tonnage). Both U.S. and Panama Canal tonnage certificates were provided.
Mary Ann Moran features an Intercon C series coupler outfitted with 34 inch diameter rams; hydraulic tensioning; port and starboard hydraulic power units; motor control center; logic/control panel; and two touch screen station remote controls.
The vessel is powered by two EMD 12-710G7C-T2 main engines each rated at 2550HP @800RPM and outfitted with Lufkin model RHS2500HG reverse reduction gears. Nominal gear ratio is 4:1. The engines are EMD’s new electronic engines that meet Tier 2 emissons standards.
Mary Ann Moran has ABS grade 2, 10-inch steel shafts, and Rolls Royce New Generation Workwheel, 5-blade, 115” diameter, stainless steel propellers.
EMI supplied the electro-hydraulic steering system, which interfaces with the vessel’s gyrocompass and autopilot.
The electrical system is a 480 VAC, 3-phase, 4-wire system, designed for non-paralleling operation. The two ship service generators are John Deere Tier 2 emissions certified 1800-rpm marine engines with Marathon generators, each providing 125 KW, 480VAC, 3-phase power.
The main switchboard, manufactured by Industrial Power Systems, is located in the engine room and fitted with a 480V, 3-phase distribution section. It is non-paralleling with a split bus.
In accordance with SOLAS requirements, an emergency generator is installed above the main deck. The emergency generator is a keel cooled John Deere Tier 2 emissions certified 1800-rpm diesel engine with a Marathon generator providing 65 kW. It is supplied with a 24V starter, 24V controls and block heater. It is arranged to start automatically (electric start) upon loss of the ship service generators.
The emergency switchboard, also manufactured by Industrial Power Systems, will sense a loss of power from the main switchboard and automatically start the emergency generator and transfer energy loads.
Markey capstans are located on the fore and aft decks. A CEWP-90, 27” diameter, 40 hp electric capstan is located aft. It has a rated pull of about 60,000 lbs at 40 ft/minute and is capable of withstanding 300,000 lb static pull. A CEW-60, 15 hp electric capstan is located forward. It has a rated pull of about 30,000 lbs at 30 ft/min.
The electronics package is consistent with SOLAS requirements and includes 5 VHF radios, Loud hailer, 2 Radars, Depth sounder, 2 GPS, GMDSS system (includes SSB radio, TELEX, FAX 5, and VHF radio), Wind speed indicator, Nav Tex, Boat Tracs, Speed Log, SSAS, AIS, Auto pilot and Gyro Compass.
Accommodations for 12 crew members are provided. Joiner work was completed by Marine Interior Systems of Covington, Louisiana and Oakledge Carpentry of Harpswell, Maine.
Tank capacities are as follows:
• 142,730 Gallon Fuel Oil
• 8,832 Gallon Fuel Oil Overflow
• 2,565 Gallon Lube Oil (main engines)
• 854 Gallon Lube Oil (generators)
• 68,354 Gallons Ballast Water
• 15,955 Gallons Potable Water
• 1,779 Gallons Dirty Oil