Installing Floor In Boat I Want To Repair A Few Spots In The Flooring Of My Boat. Why Can't I Simply Put 3/4 Inch Plywood Over It? ?

I want to repair a few spots in the flooring of my boat. Why can't I simply put 3/4 inch plywood over it? ? - installing floor in boat

I have a few weak spots on the floor today, but most plants are intact. I bought the boat used and I have no idea when the plant has been installed. I only know that my boat at a turning point.