Starfleet Academy Courses. Introduction to Starfleet. Federation starships. USS Enterprise (NCC-1701). Construction and launch: In the early- to mid-23rd century, at least twelve heavy cruiser-type starships, the Constitution-class, were commissioned by the Federation Starfleet. Constructed at the San Francisco Fleet Yards in San Francisco, California, the Federation vessel registered NCC-1701 was christened "the Enterprise", the latest in a long line of ships of the same name. Consult: TOS: "To

Starfleet Academy Courses. Subspace Communication: Subspace communications have a varying degree of band frequencies, from upper (or high-band) to lower. For example, a diplomatic frequency used by the Vulcans is on a lower subspace band. Consult: ENT: "Fallen Hero", "Dead Stop"; TNG: "Ensign Ro". Star Trek Starfleet Command | Starfleet Academy