Kronos One (IKC-7748) was the designation of the K't'inga class battle cruiser which carried Klingon Chancellor Gorkon to Federation space for negotiations following the Praxis disaster in 2293. The flagship for the Empire in that time of emergency, the Kronos One approached the Federation's own flagship, the starship USS Enterprise-A in a non-aggressive posture, being the first cruiser of its type in Klingon history to do so at a close range while not at alert status. The starship Enterprise then proceeded to escort Kronos One to Earth.
While under escort of the Enterprise-A, operatives of a covert alliance between factions of both Starfleet and the Klingon High Command carried out the assassination of Gorkon en route to Earth. The Kronos One lost artificial gravity, rendering the crew unable to man battlestations, with the vessel surviving after two direct photon torpedo impacts from the nearby, cloaked IKS Dakronh. (TOS movie, novelization & comic adaptation: Star Trek VI: The Undiscovered Country; WizKids module: Tactics)
- It is unknown whether "Kronos One" was the vessel's permanent name or a temporary code designation for the diplomatic mission.