The C-57-D was a 24th century starship registered for Federation travel.
Under the command of Captain J.J. Adams, this vessel visited Luna in 2370. From there, it was due to arrive at Deep Space 9 on stardate 47562.0. (DS9: "Whispers")
- The C-57-D was never mentioned or shown, it was simply listed in an okudagram graphic of an arrival roster on a viewscreen. No reason for the ship's odd nomenclature has been noted, but the graphic was also populated by some other in-jokes, and information concerning this vessel refers to the classic sci-fi film Forbidden Planet (including the captain's name, after Leslie Nielsen's character).