The USS Whorfin (NCC-1024) was a Federation deep space explorer that was in service during the late 23rd century.
In 2293, the Whorfin, under the command of H. Nerita, was assigned to patrol the Neutral Zone in Sector 21399 at the time Operation Retrieve was proposed. (Star Trek VI: The Undiscovered Country)
Background
This ship was not specifically mentioned, but was listed in several starship status charts seen on the sets in the movie. The Whorfin was most likely not the prototype for the Whorfin-class transports.
The name of the ship may have come from Lord John Whorfin, a character in The Adventures of Buckaroo Banzai Across the 8th Dimension The in-universe explanation may be that this ship and the S.S. Whorfin may be named after the 22nd century Captain John Whorfin.