Fri Aug 17, 2007 8:38 am
No this is not possible, but is not needed in this case. Just add the minor river link, which has an impossible cost for ships, so is integrating what the Naval Interdiction Link does.
The Naval IL is basically adding a 0 cost and effect to land and an impossible cost to ships, that is all.

Hofstadter's Law: "It always takes longer than you expect, even when you take into account Hofstadter's law."