What kind of ships are Vivacia, Paragon etc?

[Mervi]

This is a really good question. I'd suggest someone take it to the newsgroup and ask Robin, as I would be surprised if she doesn't have some kind of an answer (coming from a seafaring family, after all). It could of course be that the ships in that universe do not completely follow the "rules" of our world so they might have different names for different types.