This is the sadly remains of one of the most famous danish ferries M/S Pinen that sailed on the route at todays Sallingsund Bridge from 1958 to 1978. It's sister ship, M/S Plagen is today sailing on the route Feggesund - Næssund under the name M/S Sallingsund.
Sea - Parts 
http://www.faergelejet.dk/faerge.php?id=54&n=2