In TOS it is mentioned several times that there are only 12 Starships in Starfleet. These are supposed to be the frontline vessels that protect outposts, colonies, planets and other smaller Starfleet vessels. In a couple of episodes it is established that no other Starships are in the area to assist the Enterprise. My thought is that there should be many more Starships to cover the immense amount of space just in our galaxy alone. What do you think?