The IKS Vor'nak was a Klingon Vor'cha-class attack cruiser that was in service with the Klingon Defense Force in the late 24th century. Vor'nak was commanded by General Tanas.
In 2374, General Martok requested the transfer fifteen crew members to the IKS Rotarran, though Tanas could only provide five. They were Alexander Rozhenko, N'Garen, Katogh, Koth and Doran . (DS9: "Sons and Daughters")
According to the script for the episode, the pronunciation of Vor'nak was "VOR-nahk".