Built in 1976, by Halter Marine Services of Pierre Part, Louisiana (hull #499) as the Andrew Martin for Andrew Martin Sea Service Incorporated of Thibodaux, Louisiana.
In 1981, a fire destroyed most of the superstructure, pilothouse and upper machinery spaces. The vessel hull was laid up for several years.
In 1990, the tug was acquired by Robert Torres of River Marine Contractors Incorporated. Where the tug was renamed as the Robert L. Torres.
In 1991, she was repowered. Her original Stork-Werkspoor diesel engines were removed. And, two Caterpillar 3608 diesel engines where installed.
In 1993, she was acquired by the Jacklyn Shipping Company of Tampa, Florida. Where the tug was renamed as the Jacklyn M.
In 1996, the tug was acquired by LaFarge North America Incorporated of Chicago, Illinois. Where the tug retained her name.
In 2002, LaFarge North America Incorporated renamed the tug as the G.L. Ostrander. However, manning and operation of the vessel was contracted to Andire Incorporated of of Muskegon, Michigan.
The tug was outfitted with a Bludworth coupler system, and repwoered. Her with Caterpillar 3608 diesel engines where removed. And two EMD 645 E7B 20 cylinder diesel engines, where installed. With Reintjis RM-WGV-681 reduction gears, turning via 36(in) 4 3/16(in) by 14.5(in) shafts, two stainless steel, four bladed 140(in) variable pitch, propellers. For a rated 7,200 horsepower.
Her electrical service is provided by two 180 kW AC generators driven by Caterpillar 3306 engines. The tug's capacities are 122,116 gallons of fuel oil, 7,400 gallons of lube oil, 3,500 gallons of waste oil, and 15,967 gallons of potable water.
The tug's towing gear consists of a INTERcon 300,000(lb) double drum towing winch. Outfitted with 3000(ft) of 2.5(in) towing wire. Driven by a single GM V6-71 diesel engine.
The tug is married to the 441(ft) by 70(ft) by 30(ft) concrete barge Integrity. Constructed in 1996, by Bay Shipbuilding of Sturgeon Bay, Wisconsin for LaFarge North America, Incorporated of Chicago, Illinois.
(Jeff Thoreson, Bob Beegle, Birk Thomas)