This tip doesn't do anything except for look cool. When finished designing you ships, usually the default name is whatever the mission section of the ship is, but the humans can have something slightly different. Once you have researched all the required techs, choosing the Assault Command Section, the Barrage Mission section, and any flavor of Anti-matter engines, when you finished messing with the weapons and choose to save your design, the default name of the ship is "Sword of the Stars".
Like I said, doesn't really do anything useful, but is still fricken cool. I don't know if this works with the other races, but has been tested with humans.