The USS Fesoan was a 23rd century Federation starship, an Okinawa-class frigate in Starfleet service in the 2290s.
This ship was used in the elite Klingon Command Academy bridge crew training simulations for the Class of 2290. As such, she was encountered in the Hyndman star system in a simulated mission, in company with the USS Fuller, USS Tempest and USS Hornet. (TOS video game: Klingon Academy)