I was surprised at how well my Garmin Nuvi has been working in the Boston tunnels actually. It also tended to recover pretty quickly. By the way, that isn't w

I was surprised at how well my Garmin Nuvi has been working in the Boston tunnels actually. It also tended to recover pretty quickly. By the way, that isn't what the article is talking about. It's quite an interesting read about how NMEA screwed up the GPS protocol.