I don't know how far back the rot or wet wood goes. But it may be possible to remove the wet/rotten plywood and put thicken epoxy back between the fibeglass panels. You may want to try and dry out the area before injecting epoxy into it. A heat gun may work. After that sets up you want to rebed the hatch using silaflex or 3m 4200.
I had a dream, I was sailing, I was happy, I was even smiling. Then I looked down and saw that I was on a multi-hull and woke up suddenly in a cold sweat.
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