I have just started using a digital watch with a dedicated pilot/avaition function. its easy to use and keeps a log note of the last 99 flights duration, start and stop time and total flight time. Also does up to 20 nav legs within each flight with ave speed function. Great fun and easy to use! Nice light that stays on for 10 secs. found it here
http://www.astopwatch.co.uk/products...ionwatches.asp