Some possible ships

I'm hoping that it is possible to have different tech groups have different ships. If that is the case, we should have something like this:

In the Mediterranean:
bireme
trireme
quadrireme
quinquereme
hexareme
septireme
polyreme

In Eastern waters:
stomach striker
colliding swooper
dagger-axe ship
junk
(these are names I plucked off Wikipedia)

All of these are galley class, except possibly the junk (big ship)... but that one should only be introduced really late in the game.

Does anyone have more info on ancient ship types?