In reply to Batcloud:
Or maybe people should look after their equipment and carry a spare. If you can navigate and are using your compass properly then you'll realise that there is an error somewhere. This can be checked on a friends compass or a spare compass that's either carried personally or as part of the group.
I can understand how people see GPS as the way forward, but surely people should be learning how to navigate on a map and compass before they start relying on technological adaptations.
Plus I can't afford a GPS