Built in 1971, by Atlantic Marine Incorporated of Jacksonville, Florida (hull #76) as the Sun Chief for Sun State Marine Services Incorporated of Jacksonville, Florida. A subsidy of the Colonial Oil Company of Savannah, Georgia.
In 2002, the Chatham Towing Company merged with the Colonial Towing Company of Savannah, Georgia. To form the Chatham-Colonial Towing Company of Savannah, Georgia. Where the tug retained her name.
In 2013, the Chatham-Colonial Towing Company was acquired by the Vane Brothers Company of Baltimore, Maryland. Where the tug retained her name.
In 2020, she was acquired by the Crofton Diving Corporation of Portsmouth, Virginia. Where the tug was renamed as the Eastern Branch.
She is a twin screw towboat, rated at 850 horsepower.