PPRuNe Forums - Does ads-B out require a WAAS capable GPS receiver?

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rsiano

7th Mar 2017 18:00

Does ads-B out require a WAAS capable GPS receiver?

Does ads-B out require a WAAS capable GPS receiver?
Thanks!

peekay4

7th Mar 2017 21:42

No. However, many older non-WAAS equipment (TSO C129 or C196) cannot meet ADS-B requirements at all, or can only meet them part of the time, or can fail to meet them if there's degradation of the satellite constellation geometry.

Therefore when using a non-WAAS GPS, the pilot is responsible for doing GPS Performance Prediction before each flight to ensure ADS-B compliance, or get a exemption relief from the FAA.

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