Klingon battle cruiser commanded by Kor, trapped with the Enterprise in the Delta Triangle.
The Klothos was a Klingon battle cruiser commanded by Kor. In The Time Trap it was drawn, along with the Enterprise, into the Delta Triangle, a region of space where ships from many civilizations had become stranded in a pocket outside normal time.
The two crews were forced into an uneasy truce and linked their vessels to power their way out of the vortex together. Long afterward, in Once More Unto the Breach, the aging Kor recalled the Klothos as the ship he had commanded in his prime, describing it as a D5-class vessel.