The 2007 ISAF Worlds take place from 28 June-13 July and will be the pinnacle event for the Olympic Classes in 2007 with 75% of all the national places for the 2008 Olympic Games to be decided. All eleven Olympic sailing events will be contested in Cascais, with each event a World Championship in its own right. With up to 1,700 competitors and an anticipated 80 nations, the event will attract the top sailing stars from around the world, and is a key feature in the ISAF Centenary celebrations.