NNS Okpabana is a Hamilton-class high endurance cutter which formerly served with the U.S. Coast Guard as USCGC Gallatin (WHEC-721).

Her cruising range of 9,600 nautical miles (17,800 km) at 20 knots (37 km/h)), and an 80-foot (24 m) flight deck, capable of handling helicopters, make the ship an ideal platform for extended patrol missions.

Two 13-foot (3.96 m) diameter controllable pitch propellers, combined with a retractable and rotatable bow propulsion unit, give the ship high maneuverability.

A closed circuit TV system enables the Commanding Officer to monitor flight deck operations, machinery conditions, towing, damage control, and related activities from the bridge.

Gallatin's missions included enforcement of all U.S. maritime laws and treaties, fisheries conservation, marine pollution response, defense readiness, and search and rescue.