Quote:
Originally Posted by -Ralph-
A few quotes from websites saying they are accurate, a university study on it suggesting the same, quite a few people whose experience suggests their various GPS devices all agree, both in this thread and in others on the subject.
SH, if you think they are inaccurate at measuring a constant speed in a straight line which is what we are talking about here (ie: 70mph = 77), to more than 1 mph, then instead of asking why we think the sat nav IS accurate, then questioning the replies, why not produce some evidence as to why you think they are NOT?
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I've never said that GPS is inaccurate, nor do I think its inaccurate. I have simply been wondering how it is so accurate compared to a speedo. I have previously read that GPS is more accurate than a speedo, but no one has provided the answer as to why. So when it popped up again I asked and kaivalagi and mikerj have been kind enough to provide me with an answer, thanks guys.