What type of ADS-B Out equipment is required for aircraft operating below 18,000 feet MSL when flying in Class C airspace?

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Multiple Choice

What type of ADS-B Out equipment is required for aircraft operating below 18,000 feet MSL when flying in Class C airspace?

Explanation:
In Class C airspace, ADS-B Out must be broadcast to help air traffic control and other aircraft track you. There are two technologies that satisfy this requirement: 1090ES (Extended Squitter) and 978 UAT (Universal Access Transceiver). Both can be used for operations below 18,000 feet MSL, so either type of ADS-B Out equipment will meet the rule. GPS is typically the position source used by ADS-B Out, but “GPS-based ADS-B” isn’t a separate equipment type; Mode S alone isn’t ADS-B Out. Therefore, the correct understanding is that you may equip with either 1090-ES or UAT.

In Class C airspace, ADS-B Out must be broadcast to help air traffic control and other aircraft track you. There are two technologies that satisfy this requirement: 1090ES (Extended Squitter) and 978 UAT (Universal Access Transceiver). Both can be used for operations below 18,000 feet MSL, so either type of ADS-B Out equipment will meet the rule. GPS is typically the position source used by ADS-B Out, but “GPS-based ADS-B” isn’t a separate equipment type; Mode S alone isn’t ADS-B Out. Therefore, the correct understanding is that you may equip with either 1090-ES or UAT.

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