USS Concordia (NCC-31555)

The USS Concordia (NCC-31555) was a Federation carrier in service during the 24th century. In the 2350s, Walter Stone served as the vessel's Commander Air Group. The ship saw heavy combat during the Federation-Cardassian War. (Star Trek: The Nomad Frontier)

Background
Due to her registry number, the Concordia's crew nicknamed her the "Triple Nickel".