iFinder H2Oc altitude question

[John (west central FL)]

Does anyone know why my iFinder H2Oc consistently reports the altitude as approximately 100 feet above sea level when it's actually only about five feet above sea level? It does this when the EPE is as low as 15 feet and it's getting a WAAS signal. Thanks in advance. ~John

 

[John (west central FL)]

n/t

 

[Andrew Kalinowski]

The forum is alive - something happened to the notification system (could be at my end) and I was getting no allerts of new posts.
Anyway, to get to your question:
Looks liek you see the diference between Elipsoid and Geoid Height.
See: http://www.geod.nrcan.gc.ca/geodesy/geoid/geoid05_e.php

 

[John (west central FL)]

Thanks Andrew. I'm not sure I understand what they are saying. It would be nice if I could enter a correction into the iFinder to compensate for the error.

John