"USS Alfr"@en . . . "USS Alfr (NCC-1741) was a Constitution-class heavy cruiser \u2014 of the Achernar-subclass \u2014 on active duty in Starfleet during at least the late 23rd century. (Star Fleet Technical Manual, Ships of the Star Fleet, vol. 1 [revised])"@en . "USS Alfr (NCC-1741) was a Constitution-class heavy cruiser \u2014 of the Achernar-subclass \u2014 on active duty in Starfleet during at least the late 23rd century. (Star Fleet Technical Manual, Ships of the Star Fleet, vol. 1 [revised])"@en . . . "Heavy cruiser"@en . . "Achernar"@en . . "NCC-1741"@en . . . . . "USS Alfr (NCC-1741)"@en .