There is no quick fix. There are temporary solutions that may acutally be dangerous, the whole thing can fold up on you!

The oldest remedy is to drill many small holes through the outer layer of glass but NOT the inner layer. Then use a squeeze bottle to "inject" polyester resin into the foam between the two layers of glass. Generally, the more holes the better, the closer together the better.

This is only a temporary fix, it will not last and all such repairs I have done personally, or seen done are ugly!

If there is any way possible, dump this boat! If you continue, lots of frustration awaits!