Perth, WA - December 18: Dorian van Rijsselberghe crossing the line to win the RSX mens Medal race, RSX Men December 18 2011 off Fremantle, Australia. (Photo by Richard Langdon) ?Perth 2011 ISAF Sailing World Championships, 3rd-18th December 2011.? Perth 2011 image.??For further information please contact richard@oceanimages.co.uk +44 7850 913500 +61 478 221797??© Richard Langdon. Image copyright free for editorial use. This image may not be used for any other purpose without the express prior