Radiosport (or radio sport) is formal competition among amateur radio operators in any of three amateur radio activities, ARDF, DXing, and Contesting. The Friendship Radiosport Games is an international multi-sport event that includes all three types of radiosport. Since 1977, the International Amateur Radio Union has sponsored the IARU HF World Championship (originally named the IARU Radiosport Championship). The World Radiosport Team Championship is another international competition. Amateur radio contesting The most common use of the term radiosport is as a synonym for amateur radio contesting (ham radio contesting). Contesting is an activity where amateur radio stations attempt to make as many two-way contacts with other stations as possible, following certain defined parameters of the competition, to maximize a score. At least two specific contests have used the term radiosport in their event names; the IARU HF World Championship, a worldwide contest sponsored by the International Amateur Radio Union, was known as the IARU Radiosport Championship from its inception in 1977 until the name of the contest changed in 1986. The term radiosport also appears in the name of the World Radiosport Team Championship, the radio contest considered by many to be the closest that contesting has to a world championships. Amateur radio direction finding Radiosport also can refer to the sport of amateur radio direction finding (ARDF). Although they represent a broad range of amateur radio interests in their nations today, several member societies of the International Amateur Radio Union were originally formed for the promotion and organization of the sport of ARDF and continue to use the term radiosport in their society name. These include the Radio Sport Federation of Armenia, the Belarusian Federation of Radioamateurs and Radiosportsmen, the Chinese Radio Sports Association, the Kazakhstan Federation of Radiosport and Radio Amateur, the Mongolian Radio Sport Federation, All-Russian public radiosport and radioamateur organization «Soyuz Radiolyubiteley Rossii», Ukrainian League of Radio amateurs and the now defunct Radio Sport Federation of the USSR. SOTA (Summits On The Air) Summits or peaks are allocated unique identifiers if the mountain summit meets certain criteria (i.e. height, distance from other peaks) and is allocated potential points to be scored by activating it. There are two ways to score SOTA points; a) as an activator, meaning the operator climbs the summit and makes at least 4 contacts from it or b) as a chaser, that is, an operator who makes contact with an operator on