dabladest wrote: Is "300 Meter" the distance when it shows up in memory, or did you just chose that randomly ?.
That's roughly the distance they first appear.
itsicarus wrote: Would be nice if they were highlighted or something

*(have not verified integrity, only that it works.)
No intention of making them any easier to find, publicly, then this I'm afraid.
I will say that the sound goes off when they first appear in a 300m circle. That means it's likely forward, in the direction you're moving, or forward and off to one side just a little. Look at the minimap when the sound goes off and note the terrain that distance away.