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ADS-B

Asked by: 1545 views Aircraft Systems

So the way I understand it I don’t have to have ABS-B if I stay below 10,000 msl and don’t fly into class B or C airspace. Is this a true statement?

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2 Answers



  1. Koehn on Jan 13, 2020

    In a word: no.

    Here’s the word from the FAA:

    https://www.faa.gov/nextgen/equipadsb/research/airspace/

    (Officially documented in §91.225).

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  2. John D Collins on Jan 13, 2020

    I disagree with the characterization Koehn as your understanding is essentially true. The references he gave are accurate, but for all practical purposes your understanding is correct. There are some nuances, such as you can fly under a class C or B shelf, but not anywhere there is a 30 NM Mode C veil. You can’t fly above a class B or C area. Over mountainous terrain, you can be above 10,000 MSL as long as you stay at or below 2500 AGL. There is also an exception over the Gulf of Mexico within 12 NM of the shoreline where you need ADS-B Out if you are at or above 3000 MSL. Also, if you have an occasional need to fly into rule airspace, you can request such a flight for an unequipped aircraft when you are on the ground and at least 1 hour prior to entering the rule airspace. ATC may deny your request, but I would not expect it most of the time.

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