Just requested/received report yesterday for my system which includes the 261 transponder, 2020 GPS, and 472 with 15.3.3 software and firmware update. Passed with flying colors and compliance. I do have a question though...
The NACv accuracy values (AVG, MIN and MAX) are each reported as "4" and highlighted in yellow . According to the FAA's ADSB report user's guide, they should not exceed values of "2" and if they do, one should contact the manufacturer to resolve.
Note on NACv: The FAA has not approved, or otherwise evaluated, any ADS[ch8208]B position source with the horizontal velocity accuracy performance required to transmit a NACv value greater than 2 (NACv of 2 = Estimated Velocity Uncertainty <3 m/s). When NACv MIN and/or AVG are highlighted yellow in the Integrity & Accuracy table of the report (i.e. transmitted NACv MIN/AVG is 3 or 4) you are advised to contact your installer and/or applicable ADS[ch8208]B avionics manufacturer for guidance on how to change the NACv value to that approved by the FAA at certification, or for non[ch8208]certified equipment, a NACv value not to exceed 2 without FAA evaluation.
Anyone experience this or have any thoughts...Dynon?
Thanks!
The NACv accuracy values (AVG, MIN and MAX) are each reported as "4" and highlighted in yellow . According to the FAA's ADSB report user's guide, they should not exceed values of "2" and if they do, one should contact the manufacturer to resolve.
Note on NACv: The FAA has not approved, or otherwise evaluated, any ADS[ch8208]B position source with the horizontal velocity accuracy performance required to transmit a NACv value greater than 2 (NACv of 2 = Estimated Velocity Uncertainty <3 m/s). When NACv MIN and/or AVG are highlighted yellow in the Integrity & Accuracy table of the report (i.e. transmitted NACv MIN/AVG is 3 or 4) you are advised to contact your installer and/or applicable ADS[ch8208]B avionics manufacturer for guidance on how to change the NACv value to that approved by the FAA at certification, or for non[ch8208]certified equipment, a NACv value not to exceed 2 without FAA evaluation.
Anyone experience this or have any thoughts...Dynon?
Thanks!
