Rotten core on forward deck, how would you fix it?

[Enyar]

Did some more investigating this past weekend and I think moose is right, I need to recore that entire front area. I drilled some test holes underneath directly ahead of the port/stbd hatches and althought its not rotten, its definitely wet. I'm buttoning it back up as-is for now until I have a game plan in place to do the whole thing. I'll likely buy 3 new fiberglass hatches and try to coverup my cuts with kiwi grip.