SAN FRANCISCO — An America’s Cup that continues to see remarkable performances by fast, space-age catamarans is nonetheless plodding along because of a convergence of wind, tide and safety concerns.
Skipper Jimmy Spithill and defending champion Oracle Team USA sped around San Francisco Bay to win Race 12 by 31 seconds Thursday and prevent Emirates Team New Zealand from sailing off with the America’s Cup.
Oracle continued to improve sailing the only upwind leg on the course and at one point was foiling at 30 knots — riding only on hydrofoils, with both hulls completely out of the water — as it zigzagged ahead of the Kiwis heading toward the Golden Gate Bridge.
Shortly after Oracle’s big win, the race committee postponed a race for the fourth time in three days because the wind limit was exceeded. Full story for BostonGlobe.com subscribers.