We do not ban the use of GPS. But why would you feel the need for one?

Hopefully you have entered the event to test your navigation skills and endurance against nature. If you use additional aids you are only really cheating yourself.

We don’t believe that a GPS will make a lot of difference to a good team, it may help a hopelessly lost team, but you’ve still got to be able to transfer the GPS data to the map to find out which way you need to go!