Starfleet Academy Courses. Subspace Communication: The speed of subspace messages varies considerably depending on the technology used. For example, in the 2260s, a subspace message from the Romulan Neutral Zone took three weeks to reach Starfleet Headquarters, while a century later, at the same distance, subspace communications were virtually real-time. See: TOS: "Balance of Terror," Star Trek Nemesis. Star Trek Starfleet Command | Starfleet Academy