It’s the most coveted prize in sailing yacht racing. The next phase of the AC World Series, the precursor to the America’s Cup yacht racing competition, begins October 2 in San Francisco. This series of matches, or fleet races, will lead up to the America’s Cup that will be held in San Francisco staring July 4, 2013. San Francisco’s own Golden Gate Yacht Club will be the defending team for that set of races. The America’s Cup was first awarded in 1851 to the scooner America, captained by the Royal Yacht Squadron, following a race around the Isle of Wight. American yachters then went on the longest winning streak in sports. It lasted until 1983, when Australia II, from The Royal Perth Yacht Club, famously captured the cup.