Obviously, the GPS signal was lost when you entered the tunnel. This
is evidenced by the word GPS turning white from green. The navigation
system contains gyroscopic and speed sensors to keep track of the
direction of the car at all times. It was probably using dead
reckoning to follow the map for the time you were in the tunnel.

Dick

On Fri, 25 Jul 2003 03:23:27 GMT, Milleron
<millerdot90@SPAMlessosu.edu> wrote:

>On Thu, 24 Jul 2003 17:19:42 GMT, "noway" <nospam@nospam.com> wrote:
>
>>Moisture and especially heavy rain will effect satillite reception.
>Probably true, but I'd like to share my experience driving through the
>Brooklyn-Battery tunnel under the East River in New York a couple of
>weeks ago. I was under a couple of hundred feet of water, a dozen
>yards of dirt and rock, and a shell that was probably either solid
>steel or five feet of rebar-inforced concrete. The Navigation System
>tracked me every foot of the way.
>Go figure.
>
>Ron
>
>>
>>"Ken" <googleguy_nj@yahoo.yahoo.com> wrote in message
>>news:MiSTa.70611$0v4.4716525@bgtnsc04-news.ops.worldnet.att.net...
>>> Yesterday my navi was unable to correctly track my car. It was off by
>>maybe
>>> half a mile. After awhile it seemed to be ok.
>>>
>>> Yesterday there was heavy cloud cover and storms. But I didn't think this
>>> could affect GPS reception. Any ideas? (There was nothing covering the
>>> antenna area in the rear.)
>>>
>>>
>>
>
>Ron