Or he is "filing a flight-plan" in case he has a trip and needs rescuing if you don't hear from him later. I know some fell runners who leave a copy of their r

Or he is "filing a flight-plan" in case he has a trip and needs rescuing if you don't hear from him later. I know some fell runners who leave a copy of their route plans with a friend before heading out for similar "just-in-case" reasons, especially when going somewhere remote with particularly tricky terrain.