My dad uses that for biking, running etc. Great idea! It lacks a VMG sensor, but whatever. It costs about $70 US as opposed to $200-$600 for the velociteks. If you get a data recorder add-on you can surely mark, if you're going around a practice course, where each mark is and you can see how your speed went up/down on the upwinds, downwinds, reaches on your computer.