Competitors use a topographic map and a compass to make their way through an unfamiliar area, looking for control points that have been set up in advance. They record codes from the control points on a card, and try to complete the course in the shortest possible time.
它就是靠著一張未知區域的定向地圖和一個指北針，找到場地中預設的檢查點，再把正確的密碼記錄在卡片上，在最短時間內抵達終點的一項運動。