For Class C airspace, what ADS-B Out options are acceptable below 18,000 feet MSL?

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Multiple Choice

For Class C airspace, what ADS-B Out options are acceptable below 18,000 feet MSL?

Explanation:
ADS-B Out in Class C airspace below 18,000 feet MSL can be met with either 1090ES or 978 UAT equipment. Both technologies transmit your position and other data to ATC and to other aircraft, enabling better surveillance and traffic awareness. The 1090ES option uses the 1090 MHz signal and is widely used worldwide; the 978 UAT option uses the 978 MHz signal and is the U.S.-specific path that often includes access to FAA weather and traffic information via the UAT network. In this airspace, the FAA allows either technology to satisfy the ADS-B Out requirement, so you aren’t limited to one option. The other choices would unnecessarily restrict the available, approved methods, and saying none would imply no ADS-B Out, which isn’t permitted in Class C.

ADS-B Out in Class C airspace below 18,000 feet MSL can be met with either 1090ES or 978 UAT equipment. Both technologies transmit your position and other data to ATC and to other aircraft, enabling better surveillance and traffic awareness. The 1090ES option uses the 1090 MHz signal and is widely used worldwide; the 978 UAT option uses the 978 MHz signal and is the U.S.-specific path that often includes access to FAA weather and traffic information via the UAT network. In this airspace, the FAA allows either technology to satisfy the ADS-B Out requirement, so you aren’t limited to one option. The other choices would unnecessarily restrict the available, approved methods, and saying none would imply no ADS-B Out, which isn’t permitted in Class C.

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