The Cessna Citation II was the first of the Model 550 series of Citation jets, which are light corporate jet built by Cessna. A direct development of the Citation I, the Citation II led to the later development of the Citation II/SP, the S550 Citation S/II, and the Citation Bravo. The Citation II was also used by the United States Navy under the designation T-47A for radar system training, while the OT-47B was procured by the United States Department of Defense for drug interdiction reconnaissance.