 Teams of two competitors each operated in a unique, one-time contest, created specifically to coincide with WRTC.All of the stations used by the WRTC teams were located at existing amateur radio stations in the Seattle area, but not all of the stations were in equally advantageous locations, and some had more desirable call signs than others.Twenty-two teams of two operators each represented Brazil, Bulgaria, Canada, Czechoslovakia, Finland, France, Germany, Hungary, Italy, Japan, the Soviet Union, Spain, the United Kingdom, the United States, and Yugoslavia.