NOT FOR NAVIGATION – GPS watches are common for tracking courses and post-event analysis. We think they’re great. Many mobile phones also have GPS with, at very least, basic map functionality. We don’t consider this to be of much use in mountain navigation and therefore not an issue. However, you can also install proper GPS navigation apps with OS based maps. Use of these apps or any dedicated GPS navigation device is not allowed as they provide considerable competitive advantage and are very much against the spirit of a mountain marathon. We can’t practicably check everyone for these devices so we are relying on peoples’ integrity. However, if someone is spotted and reported using GPS to navigate, we will do a kit check and if the offence is confirmed the team will be disqualified. Altimeters are allowed.