Some good news related to coastal defenses guns: I found where in the code it deals with weapons, specifically guns
Now I just have to map out the weapons controller and learn how to use it and should be able to get the coastal guns to fire it's guns.
The other good news is that the game recognizes the coastal defense's weapon controller defined in it's sim file. I saw the game check that controller for something and it failed the check as it immediately returned from the function. Once I learn how the weapons controller works and I map it out I should be able to make some sense out of why the coastal gun's weapon controller is 'failing' whatever check it's doing.
@sober - not sure if it's path related or what. It looks like IRAI is part of the problem also
I really need to find the AI collision routines in the code so I can see how/when the game determines a unit is about to collide with land.