fox oring is a variation of the sport that requires more orienteering skills. in a fox oring course, the radio transmitters put out very little power, and can be received over only very short distances, often no more than 100 meters. the location of each transmitter will be indicated on the map with a circle. the transmitter does not need to be exactly at the circle's center or even located inside the circle, but one should be able to receive its transmissions everywhere within the area indicated by the circle. a competitor must use orienteering skills to navigate to the area of the circle on the map and only then use radio direction finding skills to locate the very low power transmitter.