What's the ratio of small craft/boat bay points for each hull space capacity at a space port?
Zume
According to ISW4, page 7, 27.14.06.8, gunboats can land at spaceports, where they use 3 hull spaces each (out of the spaceport's 40 hull space capacity).
This section doesn't mention smallcraft, but if it was me, I'd give spaceports capacity equal to boat bays, i.e., two points per hull space. This means that a single spaceport module would have eighty points and could house forty cutters, twenty shuttles, or thirteen pinnaces or gunboats.
Kurt