Multiple realities
(covers information from several alternate timelines)

A carrier vessel or carrier ship was a type of vessel that could support and launch smaller craft.

Earth operated seagoing aircraft carriers in the 20th and 21st centuries. (Star Trek IV: The Voyage Home; ENT: "Storm Front")

Starships referred to as carriers include the Kazon Predator-class and the Bajoran Antares-class. (TNG: "Ensign Ro"; VOY: "Basics, Part I")

In the 2260s of the alternate reality, information on Starfleet operated carriers were located in the Federation database. (Star Trek Beyond)

Carriers were mentioned in a list of Starfleet vessel types, which appeared to the left of the personnel file for Balthazar Edison. [1]
The Akira-class starship was designed by Alex Jaeger to function as a carrier, with a large shuttlebay extending all the way through the saucer section. [2](X)

Types of carrier vessels

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