There are nine Olympic sailing categories. The sailing field is four waterways marked by buoys for the competitors compete in. Wind and weather are important factors in sailing. The sailing category: ?Windsurfer men / women - Mistral ?Single handed Dinghy women - Europe ?Single handed Dinghy men - Finn ?Single handed Dinghy - open - Laser ?Double-handed Dinghy men / women - 470 ?Double-handed Dinghy open -49er ?Multihull open - Tornado (catamaran) ?Keelboat men - Star ?Keelboat women - Yngling The Tornado is the fastest boat competing in the Olympics. It measures 6.09 meters (20 ft.) long and can reach speeds of 30 knots. In the Olympics there are men's, women's, and mixed events. Sailing became an Olympic sport in 1900.