The Gezary was a starship manned by bounty hunters in the 23rd century.
In 2268, the Gezary was captained by Pilenna and maintained orbit around the planet Sanctuary in order to capture fugitives escaping to the planet. The ship ended up being very dirty as the crew did not wish to clean and Pilenna ended up negotiating a deal with Montgomery Scott of the USS Enterprise where the Starfleet crew would clean and repair her ship in exchange for help contacting the Senites on Sanctuary. Later, the Gezary very nearly stopped the Enterprise from rescuing Captain Kirk, Spock, and Doctor McCoy and was damaged in the battle that ensued. Pilenna contacted Scott and asked for assistance as the ship fell to the surface of Sanctuary, but he refused, saying she would be comfortable on Sanctuary. (TOS novel: Sanctuary)