The K'toch-class was a type of scout used by the Klingon Empire in the mid-22nd century. In 2151, a K'toch-class scout was used by Klingon courier, Klaang, who was to travel from Rigel X to Qo'noS to transmit vital information that the Suliban Cabal were attempting to incite civil war within the Empire. Unfortunately, he was forced to crash land on Earth after being pursued by two Suliban. (ENT novelization: Broken Bow)