Crawling Koopa, this could almost be a Flood thread.
Let's see what I can come up with.
Here we go:
Train: M3T 31 - Horsehead Large Train: NGC 7293 - Helix Advanced Train: ESO 97-1 - Hourglass
All the names are taken from real mapped Nebulas.
The first, Horsehead, is the smaller of the three and is named after the shape of the Cloud - which btw actually has something to do with the Transport... The Helix and Hourglass are very similar in size and in shape, but the second looks bigger than the first.
The numbers are only for identification and listing (They actually exist...) but can be modified anyway.