copilot/ navman gps speed readings..how accurate are they?

Submitted: Wednesday, Jan 21, 2009 at 17:11
ThreadID: 65310 Views:7552 Replies:12 FollowUps:6
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Hi all,
How accurate are the speed readings on these things I have a Mypal A696 with Copilot 7 nav software.

It is 6kph slower than the speedo in the gutlux at 100kph.

Has anyone checked with a police radar or some other method?

Cheers
Dave
Cheers,
Dave
2010 Isuzu FTS800 Expedition camper
2015 Fortuner
Had 72 cruisers in my time

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