YOW!!! You're going to have to epoxy that down again (just slather it all over the area where it has ripped away and then put some cinder blocks or some kind of weight on it to press it down firmly.
Then I'd get some fiberglass cloth and put 2-3 layers down over either tear, and at least 2 layers along the inside of the hull-deck joint there where the chaimplate-backing-rod sits. Then I'd go get a longer rod to use in place of the existing one. Probably twice as long.

That's what *I* would do anyway. Yow. That smarts! Good luck.