TheDoctorKing wrote:The coaling station IIRC should produce about two units of supply a turn - enough to feed a colonial unit (I not actually 100% sure about coaling stations but military outposts, trading posts, and governor's mansions all do and I think coaling stations as well).
Strickly speaking, these outposts, trading posts and governor's mansions, as well as several other regional structures do not produce supply.
What they do is allow foraging for a number of elements (including leaders) up to 3 x number of structures.
A small, but hopefully useful, distinction.
I don't know whether a coaling station station counts as a harbor. It's a harbor that the manual cites as suppling 4/1. IIRC, it is a collection point however.