Warped hull reinforcement

I recently bought a 1992 14.2 keel version that is in rough shape and is my first boat. It’s been siting on its trailer in the sun and full of water for about a decade from what I can gather. The wooden stringers supporting the mast are trash now and I will replace those no problem. I pulled out the cubby and have been crawling through the hole to gain access to the inside of the hull. The wood supporting the center of the deck is in ok shape despite sitting in water for quite awhile.
The...

Warped hull reinforcement