The USS Yi Sun-Sin (NCC-76545) was a Ross-class Federation starship in service to Starfleet during the early 25th century.
In 2401, the Yi Sun-Sin joined a Starfleet armada assembled to confront the massive Singularity that emerged from a spatial anomaly. The ship was briefly compromised when the Borg Queen began assimilating the USS Stargazer and obtained its command codes. After an understanding was reached with the Queen, the Yi Sun-Sin joined the Borg in a coordinated effort to deflect a massive energy burst from a newly forming transwarp conduit. (PIC: "The Star Gazer", "Farewell")
Listed on a fleet formation display
Later that year, the Yi Sun-Sin participated in Frontier Day celebrations near Sol Station. After Admiral Elizabeth Shelby announced a demonstration of the fleet's latest synchronistic technology, the Yi Sun-Sin, along with the rest of the fleet was seized by the Borg Collective, after its younger crew were assimilated by a Borg signal transmitted via Jack Crusher. (PIC: "Vox")
The name and registry of this ship was provided by Dave Blass. [1](X)
The ship was presumably named for Korean admiral Yi Sun-Sin.
| Ross-class starships |
|---|
| USS Archer • USS Ross • USS Vanguard • USS Yi Sun-Sin • Unnamed |