Modern conveniences. Some people strap on their CD or MP3 walkman and tune-in. Some can actually read a paperback while doing it. How about mobile computing? This is output from my exercise routine. I carried a GPS handheld during this morning’s outing. Since the unit is portable but neither outdoor rugged nor water resistant I took care not to drip sweat into it. Set to save auto-position waypoints every 60 seconds you can track progress and then save the whole ball o’wax as a route trace. These waypoints are stored as Lat and Lons. Great Circle formulae will tell the full details of how far and how fast. Why, you say? Because it’s the geek thing to do 🙂