Wikia

The IKS Ya'Vang was a Klingon battle cruiser that was in service with the Klingon Defense Force in the late 24th century. Most of the IKS Rotarran's crew, including Alexander Rozhenko, were transferred to the Ya'Vang in 2374, after the cruiser took heavy casualties in a previous engagement. (DS9: "You Are Cordially Invited") Alexander was promoted to weapons officer of the Ya'Vang' in the following year. (DS9: "Penumbra")

The Ya'Vang was not shown on screen.

While not an official source, Decipher roleplaying game supplement Starships stated that this vessel was a Vor'cha-class starship.

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