Stbd. Rudder & Tiller
It's apparent the tiller is built from four pieces of 6mm ply, constructed inn a box pattern. Fortunately each piece is sealed inside & out. The rot is limited to the top piece & at this stage that has been removed for most of its length.
The Rudder looks as though it had been snapped or fractured at some point. Since then, that part and the head have been laid up in fibreglass. The effect of this at the head of the blade are that it locked on moisture & is totally rotted out.
This all is not a big issue. I pretty well knew there was root there when I bought Knu, and frankly gouging out the rot is deeply satisfying. It will be so much more satisfying to overhaul these pieces & have them looking better & ready for a storm.