Today we have added Hovercraft unit which is an Industrial Age transport ship
It looked weird when brigantines carried modern tanks so we are adding proper transport ship to replace it for Industrial and Information Age.
Hovercraft has twice as much capacity as Brigantine and unlocked under Artillery tech. It is built in Military Port, so it will need sulphur to build that building in the first place.
Unlocking Hovercraft now locks out Brigantine and Wharf so think carefully about when to unlock it.