RaceQs has an app that does it for you automatically using your iPhone or Android phone. Or you can use your own GPS device and upload your GPX file to the RaceQs site post race. What is great about this app is RaceQs will assemble all uploads for a regatta automatically so you can see how you measure against your competitors in a 3D animation. Best part is the app is free. You can check out the capabilities at raceqs.com and sign up. It would be great if we got a number of competitors Midwinters to give this a field test, then report back and share. If you have comments add them to the Disqus section below.