The 1701 was Constitution-class. After the refit, it was Intrepid-class (after the first ship of that design).
No, after the refit, it was still a Constitution class vessel. Not sure where you got "Intrepid" from.
Somewhere....maybe Gene Roddenberry's novelization of TMP?....someone said that the Vulcans were responsible for the design changes of the refit and that the first ship of the redesign was a new Intrepid to replace the ship lost to the space-going amoeba. Thus the first ship of the design would set the class.
But being a novelization and not the movie itself it's not canon, is it?
