Star Trek: The Motion Picture remains an oddity for several reasons. One of them is that it just so happened to be the first Star Trek live action production since The Original Series, so a lot of rules about continuity had yet to be established. For example, the movie clearly references the Franz Joseph Star Fleet Technical Manual via comm chatter regarding the scout ships USS Columbia NCC-621 and USS Revere NCC-595, which the manual describes as being Hermes-class ships. However, since this is a book and not on screen evidence, should the Hermes-class designation even be considered a part of the main continuity? There is real world precedence for off screen ships appearing only in literature later becoming part of the greater Star Trek visual lore.
But this is an exception to the usual rule, which leads us to consider the possibility that the scout ships were of another class altogether. Oberth-class ships served as scout class vessels, and the USS Grissom had a three digit registry number, just like the USS Columbia and USS Revere. Then again, the same could be said for the Antares-type introduced in the remastered version of the TOS episode "Charlie X".
If your head isn't hurting from reading all that, what do you think? What class of ship are the USS Columbia and USS Revere?
The USS Titan, for example, originally appeared in novels by Pocket Books as a Luna-class ship, which became part of the visual continuity in the season 1 finale of Lower Decks
If your head isn't hurting from reading all that, what do you think? What class of ship are the USS Columbia and USS Revere?