Tag Archives: gyro dead reckoning

‘Garmin’ Support Provides Insights Into ‘UltraTrac’ GPS Mode.

by Anura Guruge


Click to ENLARGE and read. Received on my Twitter account.


They were responding to THIS post.

Click image to access post.


What it says about ‘UltraTrac’ in the
Fenix 5 Plus Owner’s Manual.

Click image to ENLARGE.


There is NO mention in the Owner’s Manual about pre-calibrating or that it is designed for longer than marathon distances.

I triple checked.

Plus, I have used GPS on this ‘course’ at least 100 times!

The problem, as I see it, is the same as that with open water swimming. The gyro dead reckoning is dead wrong.

Here is my response to Garmin.

Click to ENLARGE.


Related Posts:
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by Anura Guruge