USS Ki Rin (NCC-2539) was a Belknap-class strike cruiser in Starfleet service during the late 23rd century. (Ships of the Star Fleet, vol. 1) Ki Rin went missing in 2285, while on assignment to locate the USS Doreen (missing since stardate 8520). All ships in Quadrant 0 North were advised to be on the lookout for either of the missing ships. (Federation News Service 2:1)