[Miles Offshore]

I would suggest you take a core sample, see if it is wet all the way through or not. I had the same with mine but it was only wet like 1/8" out of
1 1/4" or so. If this is the case then I would do as Dan did, let it air leak/dry for a couple weeks or so and fill with git-rot or a similar substance. One thing to keep in mind if it is freshwater it will definitely rot it out, If it is saltwater when it drys it will "cure" it, not rot it. (Generally) Hope this helps, Craig