Mike, that GPS unit is definitely capable to do the "back on track" job. But, sure thing, it must be On all the time. The two AA batteries powers it for ~16 hours in Power Saving mode. I think that's plenty for even an entire day track log. If you got lost, just use the "Highway" feature with that track. Along with its integrated digital compass, it will guide you back to any spot on the recorded track. No need to set-up any special way-points on the way, just keep it On.