I don't think I ever had 90% naval in my entire life. AI is easily scared back to ports. Spread of discoveries prevents me from finding any lands unless I am immediately capable of colonizing them. Just not the way this game is played, I guess.
I'll do this one with England and I think I'll be able to do this by taking NIs related to it.
I'll do this one with England and I think I'll be able to do this by taking NIs related to it.