The UFS Arcadia was a Quantum-class Federation starship, registry NCC-A1 (originally Intrepid-class, experimental registry NX-A1), named for the region in Earth's Peloponnesus (Greece). Launched in 2378 as a testbed for quantum slipstream drive, she was the first to sport the new "U.F.S." prefix (United Federation Starship), reflecting the UFP's united interests. In 2380 the ship was extensively redesigned as the prototype of the Quantum-class fleet. (Star Trek: Arcadia)