The USS Oi was a Renaissance class light cruiser serving in Starfleet during the 24th century.
The vessel was Nikolas Stone's first assignment after Starfleet Academy. During his time aboard the light cruiser, it saw action against the Cardassian Union and participated in terraforming efforts on Velara III.
On stardate 50893.5 the Oi was docked at Deep Space Five when a Borg cube was detected. Along with the USS Lionheart and the USS Nimitz, it set off to engage the cube. Other ships would rendezvous enroute.