FAA Clarifies ADS-B Notam

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A recent FAA Notam about the reliability of ADS-B and TCAS in the southeastern U.S. that raised many questions among pilots has been rescinded and replaced with updated information, according to EAA and AOPA. The original Notam, issued Sept. 1, said the services would be “unreliable” for the month of September, and offered few details. New Notams issued on Sept. 5, 6, and 9 provide specific information about locations, altitudes, time frames and the equipment affected, EAA said. “The FAA may issue further Notams between now and the beginning of October for similar activity,” according to EAA. “As always, pilots are encouraged to keep apprised of Notams for the areas in which they are flying and take the appropriate precautions if their ADS-B or TCAS systems are affected.”

The September 1 Notam said both ADS-B surveillance and TCAS could be unreliable in Virginia, North Carolina, South Carolina, Georgia and Florida for the month of September as a result of military exercises in the area.Rune Duke, AOPA director of air traffic and airspace, said that the Notam “was causing considerable alarm for pilots.” He added that “we’re optimistic that, since similar activities held over the past decade have not caused problems for civil aviation, there will be no interference. But pilots should still be extra vigilant and report any anomalies with their ADS-B or TCAS systems to air traffic control.”

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