Built in 1962, by Jakobson Shipyard Incorporated of Oyster Bay, New York (hull #406) as the Esso Maryland for the Esso Shipping Company of Wilmington, Delaware.
In 1972, the Esso Shipping Company became the Exxon Shipping Company of Wilmington, Delaware where the tug was renamed as the Exxon Maryland.
In 1989, she was acquired by the Eklof Marine Corporation of Staten Island, New York. Where she was renamed as the Maryland.
In 1993, the the Eklof Marine Corporation was acquired by the K-Sea Transportation Partnership of East Brunswick, New Jersey. Where the tug retained her name.
In 2011, the K-Sea Transportation Partnership was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
Powered by two, Wartsila 9L20 diesel engines. With Haley GMCV-2040 reduction gears, at a ratio of 3.407:1. Turning two, 94(in) by 75(in), stainless steel, four bladed, fixed pitch, Coolidge propellers. She is a twin screw tug, rated at 3,010 horsepower.
Her electrical service is provided by one 99kW Delco generator, driven by a Detroit Diesel diesel engine. And, a 100kW Marathon generator, driven by a Detroit Diesel diesel engine. The tug's capacities 36,580 gallons of fuel.
The towing equipment consists of a single Markey TSY-32 towing winch. Outfitted with 1,400(ft) of 1.5(in) towing wire. Driven by single 75 horsepower motor.