hull design

I am finishing my first cruising season with my beloved Mac 25, 'Holly'. We have quite a bit of water on board, and are a bit concerned. The guys at my marina have told me that the hull is shot, and the stringers are rotten. Does anyone know if this model even has wooden stringers? I found out...

There is an interesting article in the July 2017 issue of Physics Today about the history of the wave-line theory of hull design that was responsible for many of what we refer to as classic hull shapes. Link: http://dx.doi.org/10.1063/PT.3.3627