USS Rahman (NCC-514) was a Saladin-class destroyer on active duty in Starfleet during at least the 23rd century. (Star Fleet Technical Manual) Ship was redesignated NCC-574 prior to construction upon recovery of the missing USS Kelvin, which was uprated to a Saladin-class variant and designated USS Kelvin (NCC-514). (Starship Saladin) In One Possible Timeline the Rahman was Given the Registry NCC-584 when the USS Kelvin (NCC-514) Was Recovered. and the USS Hercules (NCC-584) was then assigned the number NCC-626 As a Hermes class Starship.