IOF Symbols

IOF control descriptions are now used at the majority of NOR events on all courses above Yellow, although Orange and Long Orange may have the alternative of written ones.

Maprunner-IOF-control-descriptionsPictorial descriptions are easy to understand with a little practice, and give a precise location of the control. The complete  IOF control description specification produced by the IOF is available and a  single sheet pdf file can be downloaded from