Built in 1996, by Trinity Marine Group. A division of Halter Marine Services of Lockport, Louisiana (hull #1528) as the Z-One for the Great Lakes Towing Company of Cleveland, Ohio.
In 1996, the tug was transferred to Tugz International of Fort Lauderdale, Florida. The company had been established as subsidiary of the Great Lakes Group of Cleveland, Ohio. The company specialized in design, construction and the leasing of tug boats.
In 2004, the tug was chartered to McAllister Towing and Transportation of New York, New York. Where she was renamed as the Matthew McAllister. She was the second tractor tug acquired by the McAllister Towing and Transportation Company. And, the eleventh tractor tug to enter service to McAllister Towing.
In 2009, the tug was returned the tug to Tugz International of Cleveland, Ohio. Where she was renamed as the Z-One. And, assigned to the Puerto Rico Towing and Barge Company of San Juan, Puerto Rico. Another subsidiary of the Great Lakes Group of Cleveland, Ohio.
In 2015, the Puerto Rico Towing and Barge Company was acquired by the Moran Towing Corporation of New Canaan, Connecticut. Where the tug retained her name.
Powered by two, Caterpillar 3516 BTA diesel engines. Driving two Ulstein 1650H, z-drives mounted aft. With two, 86(in) by 81(in), four bladed, stainless steel propellers. With an additional, Caterpillar 3608B DITA diesel engine. Driving a hydraulically controlled Ulstein 580 HRV, z-drive mounted forward for a rated 5,100 horsepower.
Her electrical service is provided by one, 110kW generator set. And, another 99kW generator set. The tug's capacities are 34,359 gallons of fuel oil, 503 gallons of lube oil, 1,775 gallons of potable water, and 1,572 gallon capacity of AFF foam.
She is ABS Classed +A-1 Towing, +A.M.S. Ice Class D. The tug is equipped with a fire pump, rated at 3,000 Gallons Per Minute, feeding two fire monitors.
Her towing equipment consists of an Almon Johnson, double drum, winch outfitted with 450(ft) of 7(in) Dynema line per drum. A second Almon Johnson, single Drum winch is mounted on her stern. Outfitted with 450(ft) of 7(in) Dynema line.