The USCGC Greenbrier is a Kankakee class 75-foot river buoy tender which was built in 1990 by Avondale Shipyard Small Boat Division, New Orleans, Louisiana.

The tenders push a specific-use 130 foot maintenance barge, with specialized cranes and equipment.

The Kankakee class ships were built to replace old vessels.

These are powered by 2 diesel engines turning 2 shafts with 1,080 bhp, giving the vessels a capability of 12 knots (22 km/h; 14 mph) The Greenbrier is based out of the Cutter Support Team Natchez Moorings on L.E.

Barry Road, in Natchez, Mississippi, and was involved in Hurricane Katrina relief operations in September 2005.