"USS Rickover (NCC-1890)"@en . . "USS Rickover (NCC-1890) was the lead ship and prototype of the Rickover-class fast frigates. It was on active duty in Starfleet during at least the late 23rd and early 24th centuries. (Starfleet Dynamics, 2291 edition) This registry conflicts with that of the lead ship and prototype of the Cyane-class heavy frigates. Perhaps they exist in different continuities, or one or two vessels of the Avenger-class were rescheduled and refit to Rickover-class configuration instead of the Cyane class one."@en . . . "USS Rickover (NCC-1890) was the lead ship and prototype of the Rickover-class fast frigates. It was on active duty in Starfleet during at least the late 23rd and early 24th centuries. (Starfleet Dynamics, 2291 edition) This registry conflicts with that of the lead ship and prototype of the Cyane-class heavy frigates. Perhaps they exist in different continuities, or one or two vessels of the Avenger-class were rescheduled and refit to Rickover-class configuration instead of the Cyane class one."@en . . . .