Memory Alpha
Memory Alpha

NCC-2004 was the registry of a 23rd century Federation Excelsior-class starship operated by Starfleet.

In 2293, this ship's registry appeared along with the Excelsior-class starships Challenger and Enterprise on the navigation console of the Enterprise. (Star Trek Generations)

This starship was only mentioned in writing.
For the display in Star Trek Generations, this ship's silhouette was that of the refit Excelsior-class USS Enterprise-B.
In the episode VOY: "Flashback", Lieutenant Tuvok suffered flashbacks to a false memory created by a virus masquerading as a repressed memory engram while serving on the USS Excelsior. This display was reused for the sequence. Tuvok's father was serving in an unknown capacity aboard the Yorktown that was mentioned in this episode. When Michael Okuda wrote the Star Trek Encyclopedia, he described the 2293 Yorktown – the one Tuvok's father served on – as the second ship to bear the name.