Built in 1974, by Halter Marine Services Incorporated of New Orleans, Louisiana (hull #414) as the Mister John H. 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.
In 1985, Zapata Marine Service, Gulf Fleet Marine Incorporated, and Jackson Marine Services merged to form Zapata Gulf Marine Service Incorporated of Houston, Texas. Where the tug retained her name.
In 1992, Zapata Gulf Marine Incorporated merged with Tidewater Marine Incorporated of New Orleans, Louisiana. Where the tug retained her name.
In 2007, the tug was acquired by the Crosby Marine Transportation Company of Golden Meadow, Louisiana. Where she was renamed as the Crosby Freedom.
In 2016, she went out of documentation, and was scrapped.
Powered by two, ALCO 12-251 diesel engines. With Lufkin reduction gears. Turning two, four bladed, fixed pitch, propellers. She was a twin screw tug, rated at 4,000 horsepower.
Her electrical service was provided by two 150kW generators. Driven by two, GM 8V-71 diesel engines. The tug's capacities were 110,990 gallons of fuel oil, 1,725 gallons of lube oil, 20,695 gallons of cargo water and 6,105 gallons of potable water.
The tug's towing gear consisted of a double drum, Skagit SBS DTW 150, towing winch. Outfitted with 2,500(ft) of 2(in) towing wire on each drum.
(Captain Eric Takakjian, Kyle Stubbs)