I was thinking maybe they were using the car speed sensor, but this is a portable unit. Instead, Alpine says: "Three Advanced positioning sensors yield more accurate vehicle position so your navigation can pinpoint where you are and get you exactly where you want to go, even when driving through tunnels and around tall buildings. " http://www.alpine-usa.com/US-en/products/product.php?model=PND-K3&view=Navigation
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What the hell is a Tunl? I think I'll stick with my garmin, for now.
A Tunl is apparently nothing like a Tunnel which is something which normally prevents GPS navigation units from acquiring a signal.
Well in that case, impressive signal acquisition, but you have to admit its an odd spot for a photoshoot, no?
I was thinking maybe they were using the car speed sensor, but this is a portable unit. Instead, Alpine says: "Three Advanced positioning sensors yield more accurate vehicle position so your navigation can pinpoint where you are and get you exactly where you want to go, even when driving through tunnels and around tall buildings. "
http://www.alpine-usa.com/US-en/products/product.php?model=PND-K3&view=Navigation