The USS Springfield (NCC-1963) was a Federation starship in service during the late 23rd century.
In 2293, it was assigned to patrol the Klingon Neutral Zone. It was among the starships that would have been assembled for the abandoned assault code-named Operation Retrieve, which would have rescued Captain James Kirk and Doctor Leonard McCoy from Qo'noS. (Star Trek VI: The Undiscovered Country)
Background
The Springfield is visible as an Oberth-class silouette icon on the chart in the Federation President's office. This ship is not related to the Springfield class of starships, which were in service during the 2360s.
While not an official source, a Decipher roleplaying game supplement states that this vessel may be a Ranger class starship.
Springfield is said to be the most common town name in the United States of America, with 37 cities by that name (and many more with variations of that name, such as "Springfield Crossing" or "Springfield Plantation") in over 30 states. It is possible that one of these cities is the origin of this ship's name.