IOF Control Descriptions
Orienteering is a worldwide sport. It is the aim of the IOF control description symbols to provide a stable means for orienteers from all countries to be able to understand control descriptions without ambiguity or the need for language translation.
This image shows how the symbols can be used to do this. You can right-click on the image to download it or open in a new tab or window and then use the magnifier to make it larger.