As you can see the cabin floor was actually worse then the main floor. The reason was the main floor was replaced, but the cabin floor was original 1977 Riveted in ply. The main place the rot hit was where the cabin wall bulkhead met the orginal cabin flooring. It pretty much just fell apart around the rivets. Not pictured are the gas tanks that were removed prior to the picture. They were in the areas that appear darker at the bottom of the frame. They were just crudely boxed in with treated ply and rusted out nails. Who uses nails on a boat?