The ship was laid down on 5 May 1977 by the
Marinette Marine Corp. of
Marinette, Wisconsin.
Narragansett was launched on 12 May 1979, and delivered to the Navy on 9 November 1979. Her hull was built of welded steel plates. She is long at the waterline and overall, with a beam of , and a draft of . She displaces 2,260 tons fully loaded. As originally built,
Narragansett had two
controllable-pitch Kort-nozzle propellers for propulsion. She had two 20-cylinder Diesel engines,
GM EMD 20-645F7B, which provided 4,500
shaft horsepower. These would drive the ships at 15 knots. She also had a 300-horsepower
bow thruster to improve maneuverability. Electrical power aboard the ship was provided by three 400 Kw generators. These were powered by three
Detroit Diesel 8v-71 engines. One of the missions of a fleet tug was to tow damaged warships back to port. She is equipped with a SMATCO 66 DTS-200 towing winch for service as a towboat. She has a 10-ton capacity crane for moving loads on the aft deck. There were connections to bolt down shipping containers and other equipment. Like all MSC ships,
Narragansett was crewed by civilian mariners. At launch, her complement was 16 civilian crew and a 4-person military detachment of communications specialists. The ships could accommodate an additional 16 people aboard for transient, mission-specific roles. All the ships of the
Powhatan-class were named after
Native American tribes.
Narragansett was named after the
Narragansett people, which had their historical center in the Rhode Island area. == Military Sealift Command service (1979–1999) ==