For example, "C-1" is a canoe singles event and "K-2" is a kayak doubles event. Races are usually 500 metres or 1000 metres long, although there were also 10 km events from 1936 to 1956. On 13 August 2009, it was announced by the International Canoe Federation that the men's 500 m events would be replaced at the 2012 Summer Olympics by 200 m events with one of them being K-1 200 m for the women.