When I put a door into the unused space under the starboard side bench seat I discovered a little water.  That Project was called Under Galley Storage.  The water appears after a heavy rain and now that I have the door in place it evaporates after a few days.  However I don't want the items in the storage space to get wet so I went down to West Marine and discovered Dri-Dek.  Dri-Dek comes in 12"x12" squares and they snap together.