(written from a Production point of view)
The IKS K'Tanco was Kang's ship. Kor saw it in an extended version of the dream he had in the episode. This reference was found in the script for "The Sword of Kahless" but did not make it onto the screen. According to the script for this episode, the pronunciation for K'Tanco was "ka-TAHN-co".
It should be noted that Kang is known to have commanded at least three unnamed ships.