3 ms·
Position is nice, but you do want to know if that plane a couple of miles out heading in your direction is a Piper Cub doing 80mph or a 737 doing 400mph.
by kjs3 11y ago
Position is nice, but you do want to know if that plane a couple of miles out heading in your direction is a Piper Cub doing 80mph or a 737 doing 400mph.