Mobile, Ala. based Cooper Marine announced it has added the 4,200-horsepower towing vessel David J. Cooper Jr. to its fleet.This vessel, built in 1977 and formally named American Pharaoh, was acquired from Turn Services, based in new Orleans.Now homeported in Mobile, the 120-foot-long towboat will be used for transporting cargo on the Tennessee-Tombigbee Waterway, Cooper Marine said.