|Display graphic depicting the Ajax serving in Picard's fleet (2368)|
|Owner:||United Federation of Planets|
The Ajax was one of the ships that received Kosinski's experimental warp drive upgrades in 2364. The engineering staff reported a measurable increase in performance and engine efficiency following the upgrade. It was later suggested that these enhancements in performance may have been attributed to straightening out simple engine inefficiencies experienced by the older ship. (TNG: "Where No One Has Gone Before")
In 2368, the Ajax was assigned to Captain Picard's fleet that blockaded the Klingon-Romulan border during the Klingon Civil War. It served as a focal point in the tachyon detection grid, as it was linked to thirteen other starships during the grid's initial deployment. (TNG: "Redemption II")
In the episode "Brothers", the Ajax was identified as an Excelsior-class starship with the registry of NCC-13554.
The registry was derived from the tachyon detection grid that was displayed on the bridge of the USS Enterprise-D in "Redemption, II". The class was derived from a starship mission status chart that was displayed in the observation lounge of the Enterprise-D in "Chain of Command, Part I".
In Star Trek: Legacy, Ajax appeared as a playable starship, designated as a scout.