Pictured as: the Delta Ace (Crosby Marine) Photo by: Glen Daigrepont

Built in 1981, by Herbert Iron Works Incorporated of LaRose, Louisiana (hull #4) as the Norma Plaisance for Herbert Iron Works Incorproated of LaRose, Louisiana.

In 1996, the tug was acquired by the Allied Towing Service Incorporated of Venice, Louisiana. Where she was renamed as the Miss Judy.

She was later acquired by Double Eagle Marine Incorporated of New Iberia, Louisiana. Where the tug was renamed as the Storm Eagle.

In 2004, the tug was acquired by the Delta Towing Company of Houma, Louisiana. Where she was renamed as the Delta Ace.

In 2011, she was acquired by the Crosby Marine Transportation Company of Golden Meadow, Louisiana. Where the tug retained her name.

In 2012, the tug was acquired by J. Sercovich Incorporated of Belle Chasse, Louisiana. Where she retained her name.

Powered by two, GM V-12-71 diesel engines. With Twin Disc reduction gears, at ratio of 4.5:1. Turning two, 52(in) by 40(in) by 4(in), stainless steel, fixed pitch propellers. She is a twin screw tug, rated at 900 horsepower.

Her electrical service is provided by two, 30kW generator sets. Driven by two, GM 3-71 diesel engines. The tug's capacities are 12,000 gallons of fuel oil, 55 gallons of lube oil, and 15,000 gallons of potable water.

The tug's towing gear consists of two, Parker, manually operated make up winches.