Built in 1971, by Halter Marine Services of New Orleans, Louisiana (hull #314) as the Mister Harold for the Jackson Marine Corporation of Houston, Texas.
The Jackson Marine Corporation was owned by the Halliburton Corporation of Houston, Texas. The company owned a total of ninety vessels. Consisting mainly of offshore tugs, and supply vessels. With some chemical transport and well stimulation vessels.
The Jackson Marine Corporation later merged with the Zapata Gulf Marine Company of Houston, Texas and the Gulf Fleet Marine Company of Houston, Texas. The company became the largest shipping company in the world with a total of four hundred fifteen vessels.
In the fall of 1986, Seahorse Marine Incorporated of Lockport, Louisiana merged into the Zapata Gulf Marine Company adding an additional ninety vessels to the fleet.
The Seahorse Marine Company had been founded by the Arthur Levey family as Arthur Levey Boat Company after World War II. The company was later acquired by Petrolane Natural Gas of Belding, Mississippi. Where the company was renamed Seahorse Marine. In 1985, Petrolane was acquired by the Texas Eastern Company of Houston, Texas. Which was a larger natural gas company. However in the fall of 1986, the Texas Eastern Company traded the company to the Zapata Gulf Marine Company for an exchange of stock.
On January 15th, of 1992 the Zapata Gulf Marine Company merged with Tidewater Marine Incorporated of New Orleans, Louisiana. Where the tug retained her name.
In 2002, Tidewater Marine Incorporated renamed the tug as the Harold.
In 2005, the tug was acquired by Captain Arthur Fournier of the Fournier Towing and Ship Service of Belfast, Maine. Where she was renamed as the Escort. The tug primarily worked as an escort and assist vessel in Buzzards Bay, and the Cape Cod Canal in Massachusetts.
In 2006, she was acquired by the McAllister Towing and Transportation Company of New York, New York. Where she was renamed as the Michael J. McAllister.
Powered by two, twelve cylinder, Alco 12-251 F diesel engines. With Lufkin reduction gears, at a ratio of 5.6:1. Turning two, cast steel, fixed pitch, propellers. For a rated 4,100 horsepower.
Her electrical service is provided by two, 98kW generator sets. The tug's capacities are 134,5000 gallons of fuel oil, 2,000 gallons of lube oil, and 23,300 gallons of potable water.
The tug's towing equipment consists of an INTERcon, double drum, towing winch. Equipped with 2,400(ft) of 2(in) towing wire, on each drum. As well as, an additional New England Trawler X1510 capstan. The tug is fitted with four fire stations.
(Captain Eric Takakjian, Captain Brian Fournier)