USS Sentinel (NCC-63088)

The USS Sentinel (NCC-63088) was an Akira-class Federation starship in service in the late 24th Century.

The Sentinel visited Starbase Deep Space 9 in 2375, during which Nog discovered the ship had a surplus graviton stabilizer on its manifest which Chief O'Brien needing for the USS. Acting on O'Brien's behalf, Nog initiated a complex series of trades that saw the extra stabilizer eventually being swapped for a phaser emitter from the USS. 

The ship was commanded by Captain Alyson Foxton. 

Background
While the Sentinel was first mentioned in "Treachery, Faith and the Great River" its class and registry weren't. The class of the ship comes from the e-book series, where the ship has a different Captain from the one featured in Argus continuity.