USS Potemkin (NCC-1657) was a Constitution-class heavy cruiser active in the second half of the 23rd century, commissioned ca. 2250. (Star Trek novel: Collision Course) She was later converted to a training ship (2251-52. Ships of the Star Fleet, vol. 1 [revised]) In Star Trek: Avenger continuity, Potemkin was commissioned in November, 2251. (Avengerpedia, 2011 revision) Immediately prior to his assignment as helmsman of USS Enterprise, Lee Kelso served on Potemkin. (TOS novel: My Brother's Keeper trilogy: Constitution) The registry of this Potemkin was NCC-1711.