Hello
"One of the biggest difficulties would be that these vessels survived by disguising themselves. If you made one loosely playable you would have the problem that enemy units would attack you on sight which is not realistic" :hmm:
If you fire at non enemy ship then for some time you are enemy to this country
at least this way it was supposed to work with SH3. Maybe you need to test it with SH4 1.5 if it works. :hmm:
Good luck