Built in 1976, by the Marinette Marine Corporation of Marinette, Wisconsin (hull #166) as the ATF 166 (Powhatan) for the United States Navy.
Her keel was laid down on September 30th, 1976. She was launched on June 24th, 1978 and she was delivered to the United States Navy on June 15th, 1979. The tug was assigned to the Military Sealift Command, as the T-ATF-166 (USNS Powhatan).
On February 26th, 1999 the tug was placed out of service. And was leased for commercial use to the DonJon Marine Company Incorporated of Hillside, New Jersey. With the stipulation that the tug was subject to recall by the United States Navy.
On February 25th, 2008 the lease with the DonJon Marine Company ended. And, the vessel was struck from the Naval Register. And she was disposed of through the Security Assistance Program (SAP), for Foreign Military Sale
On February 26th, 2008 she was acquired by the Turkish Navy. Where the vessel was designated as the TCG Inebolu (A-590).
Powered by two, twenty cylinder, EMD 20-645F7B diesel engines. Turning two, stainless steel, controllable, reversible pitch propellers, mounted in kort nozzles. With a single, 300 horsepower bow thruster. She is a twin screw towing vessel rated at 7,200 horsepower.
Her electrical service is provided by three, 400kW generator sets. Driven by four DD 8v-71 diesel engines. The tug's capacities are 206,714 gallons of fuel oil, 6,100 gallons of lube oil, 5,800 gallons of potable water, 6,000 gallons of drinking water.
The towing equipment consists of a single drum, SMATCO66 DTS-200, towing winch, with a level wind. Outfitted with 2,500(ft) of 2.5(in) towing wire. With a Lake Shore traction winch, outfitted with 15(in) towing hawser. A direct drive capstan, as well as two sets of hydraulic towing pins. And two electro hydraulic mooring winches.