The USS Czar'ak (NCC-1798) was a Constitution-class Federation heavy cruiser starship of the Achernar-subclass, ordered for construction in the 23rd century, named for the star Czar'ak.
Construction of Czar'ak was authorized by the Starfleet appropriation of stardate 5930. (ST reference: Star Fleet Technical Manual)
- The stardate given would seem to suggest this ship was ordered during the TAS era. It is not positively known if this vessel was built, only that it was authorized. Since the registry number NCC-1798 was later used for the USS Discovery, an assumption that could be made would be that the Czar'ak was renamed Discovery some time after it was authorized.