Perth, WA - December 18: Saskia Clark, Hannah Mills in the women's 470 medal race, Women's 470 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 written permi