Pelgos was intended as a place to unlock ships there, so adding ship pre planet is kinda against it's design, but it is a thing asked from time to time so let me write a bit more about it:
Ironclad was added per demad of one of players to keep it consistant with how ship progression goes, because getting it early on breaks planet a bit.
Steam boat fills the same role as boat so i left it as is.
Nauvis is not a great place for ships, and while you can technicly use them there it was not designed around it, tried it before.
Wayward seas is technicly playable without ships. It is not intended to be played with Pelagos because it's in some sense opossite idea, but some players will probably try to run these mods togeather, so I made sure they didn't crash. This planet was created as a response to my dissapointment with what's wayward do to gleba. Pelagos embrace gleba instead of changing it.
Planet itself don't tinker with vanilla recipes, is mostly isolated in tech tree and keeps same entities as cargo ships and other ship mods so it can be easly added and removed mid play unless it's forced by other mods as a required dependancy.
If someone intend to use ships before getting there (wayward and nauvis) then should install ships before getting there and add mod mid play. Planet still works, but that's not how i intended to play with it as said before. So This is my first recomendation, and how most players go around it. I am fine with planet beeing optional thing added/removed mid flight.
Regarding linked thread:
I would prefer to keep pelagos as optional, to avoid cases like this. This is compromise. Early ship is something against design, and intended way of playing with mod.
Please also keep in mind that I will think about it so it could change in future.
There is also option to start game with any planet start on Pelagos to get and use ship there and then bit in nauvis, gleba with wayward and aquilo, and aside of adding mod mid play that's second thing that I recomend. This is in line with planet design.