Alternate reality
The USS Trainer was the name given to the bridge simulator at Starfleet Academy in the mid-23rd century used for the Kobayashi Maru scenario.
On his third trial, Cadet James T. Kirk inserted a subroutine to cheat the test and rescue the crew of the USS Kobayashi Maru from the Klingons in 2258. (Star Trek)
The Trainer bridge was a reuse of the USS Kelvin bridge set.
The name USS Trainer originated from the source's script.[1]