As much as possible. Obviously fibre glass doesn’t have a re-use but all the fixtures and fitting will be removed and reused. If the boat is wooden the wood will be churned up and used in products like chipboard. So there’s a chance your Ikea furniture may have a bit of boat in there!
All working parts of the boat will be listed for sale so other boat owners can re-use them and avoid more waste. Some boats even have second lives and go off to be used in TV shows or on movie sets and as far as we are concerned this means they’re 100% recycled!