On Feb 12, 2011, at 11:11 42PM, Randy Bush wrote:
>> Your suspicion may be accurate and accidental. I rented a car in San
>> Diego the other day -- there was a sign warning that the key fob might
>> not work within 5 miles of the port -- San Diego has a major Navy base
>> -- because of interference from shipboard electronics.
>
> same time, my phone's gps claimed accuracy to 700m in the 10 miles from
> san diego airport. that is not a lot of good for nav. luckily i used
> to hang down there in the late '70s and early '80s so kinda knew my way
> around.
>
That sounds like it didn't have a GPS fix at all, and was instead using cell
site proximity location. (I didn't check my phone's GPS; my Garmin unit had
no trouble.)
--Steve Bellovin, http://www.cs.columbia.edu/~smb
