[FM3] Ocean City blueprint

In Alisa scenario you can get them just before stage 53 with the password given by Koike, and iirc they're easy to get aswell in Emma scenario, but what does it do if you don't download them ?

I know for example there's a stage where Ryogo has to get out of his wanzer at the start if you didn't download the sewer map earlier. If you did the stage happens without the penalty.