USS Helin

From Memory Alpha, the free Star Trek reference

The USS Helin (NCC-1692) was a Federation scientific survey ship in service during the late 23rd century.

In 2293, it was assigned to patrol the Neutral Zone in Sector 21290. (Star Trek VI: The Undiscovered Country)

[edit] Background

This ship was not specifically mentioned in the movie's dialog, but was listed in several starship status charts seen on the sets of the film. In an issue of Bjo Trimble's "Space-Time Continuum," it is mentioned that American astronomer Eleanor F. Helin was given a model of this ship, which was Oberth-class.