My father is about to return to the Czech Republic to hike in the area where he crossed the border under machine gun fire in 1950. He will be taking my GT31 to record his trip. What settings would be recommended for the data logger. I have set to min speed 0. Units metres. and 60 second recording interval.

Hi Frant, If you have a 2gb SD card in it, you could set it to a higher trackpoint rate. I guess it depends on how long it will be on for but it will have to be recharged at least every second day, if not every day. The SD card will hold many days at even 1 second interval. I recon you should think about maybe 10 sec interval?