He won a silver medal in the 6 metre class with the boat `` Elisabeth X '' at the 1952 Summer Olympics in Helsinki , together with Finn Ferner ( his brother ) , Erik Heiberg , Tor Arneberg and Carl Mortensen .
He won a silver medal in the `` 6 metre class '' with the boat `` Elisabeth X '' at the 1952 Summer Olympics in Helsinki , together with Finn Ferner ( his brother ) , Erik Heiberg , Tor Arneberg and Carl Mortensen .