But if they are lost how can they find these points? If they have GPS and know where they are then they can find their way out. This only makes sense if you kno

But if they are lost how can they find these points? If they have GPS and know where they are then they can find their way out. This only makes sense if you know you will be in trouble shortly but are not yet, I.e. you are very low on water, but most people don't realize how deep they are, then panic.