Using GPS devices and smartphones as electronic navigation aids

A recent article on the Mountaineering Scotland website provides excellent advice on navigation including the pitfalls of using GPS devices and smartphones as  electronic navigation aids . A recent 20 hour search for a lost walker Scafell Pike / Broad Crag/ Great End involved over 70 rescuers and could have been avoided if reliance had not been placed on a mobile phone for navigation. The walker was extremely lucky to survive his ordeal on the mountain is appalling weather.