A Vulcan combat cruiser THe D Kyr class has a unique design with circular nacelles that fold into a horizontal position when not in use or when deploying a support craft that docks within the engine loop. It has an auxiliary control room on the engineering deck that can operate all of the ships functions independently of the bridge When the Enterprise NX-01 was to have its mission cancelled, the D Kyr was sent by Ambassador Soval of the Vulcan High Command to rendezvous with the Enterprise and recover Subcommander T Pol.