I believe this to be former USCG HH-3F Pelican 1481 pcn 44 025 operated out of Clearwater which entered AMARC September 1992 and went to National Aircraft September 1995.
432 TDG (Tactical Drone Group) /11 TDS. The unit performed photographic reconnaissance with the AQM-34 tactical drones. These were launched from DC-130 aircraft and after they had completed their mission were recovered (in flight!) by the CH-3 helicopter.