![Flying start: Oracle Team USA on the water in Bermuda, in America's Cup qualifying. (Ricardo Pinto/ACEA via AP)](/web/20170530045623im_/http://www.smh.com.au/content/dam/images/g/w/e/t/t/a/image.related.wideLandscape.460x259.gwesyg.png/1495945251987.jpg)
America's Cup Defender crosses a line, to join its Challengers
At this thrill-seeking stage of the America's Cup, foiling catamarans with helmeted crews of six will hit speeds approaching 50 knots (about 57 mph) while skimming across the powder-blue waters of Bermuda's Great Sound.