USS Phoenix-X (NCC-75948)

The USS Phoenix-X (NCC-00001) was a Multi-Vector class starship launched in 2374, a special experimenting Federation starship - the first with an X in its name as part of a Phoenix-X series of ships and not the 24th vessel in a Phoenix series of ships. It served as an experimenting vessel of Starfleet, and most of all Section 31.

Construction
The Phoenix-X was secretly built at Teketekon Station, funded by Section 31. X-Team Engineers and Cardassian Engineers assisted in its construction under the guidance of Director Sloan and Admiral Theseus. Construction began in 2368 and until its near completion in 2370 (Stardate 47797.6, FF:The Recruited). But the Phoenix-X wasn't officially launched until 2374 (Stardate 51599.74, PNX:The Tiloniam System, with command taken over by Captain Daniel.