After several days walking and having covered a hundred miles or so, I get back home, look at the map and the photos I have taken, and wonder where on earth have I been exactly?
Well now my wondering is over, by taking a Super Trackstick with me I have a GPS log of where and when I have been (and where I have mistakenly gone off route got lost). It is not perfect but it allows me to review the route, work out how far I have gone (in what time), and where I stopped. Knowing the location of each stop is particularly useful to work out where photos were taken (though I am sure GPS in compact cameras will become standard one day).