GPS Hacking
This is fun. If, like me, you use one of Garmin's dinky little eTrex GPS units, I've just discovered that it has a few little secrets. Believe it or not, there's at least one website dedicated to hacking 'em, and the best news for me is the hidden 'Service Mode'.
To see it, you press the 'up' and 'page' buttons as you turn it on. The reason I'm so excited is that among all the data that flashes up is the temperature, four lines down (click the photo to see what I'm on about). It seems that every eTrex has a built-in thermometer, but this is the only way of seeing it. Believe it or not, I didn't have a thermometer during my last expedition (it was left out of the sledge on weight-saving grounds) and I skied for 72 days over the Arctic Ocean without knowing what the temperature was (other than 'cold', obviously).
— Filed under Miscellany