Marciano_1 Posted May 5, 2015 Share Posted May 5, 2015 I have it for around 4 years. Traveling by plane I use to check altitude variations: altitude and vertical speed It was good compairing to airplane displays info. Now I see slow data variations compairing to real values. If the plane is at 30000ft the gps displays 8000ft and ascending slowly. Same is while descending. Vertical speed also is wrong. I remember 60ft/sec variations. Now I only see, in the same situation, 2ft/sec. Real slow variations seem to be ok traveling by car in mountains where variations are not radical. What can I do? Thank you Quote Link to comment
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