FAA Airline Transport Pilot (ATM)Navigation, Air Traffic Control and ProceduresEasy
A pilot is planning a VFR flight that will operate at 9,500 feet MSL within 25 nautical miles of a Class B primary airport, inside the designated Mode C veil. Under 14 CFR 91.225, which equipment is required for this flight?
- AADS-B In is required but ADS-B Out is optional
- BADS-B Out is required
- COnly a Mode C transponder is required, with no ADS-B equipment needed
- DNo additional equipment beyond a basic transponder-less radio is required
Show answer & explanationAnswer & explanation
Correct answer: B. ADS-B Out is required
14 CFR 91.225 requires ADS-B Out equipment for operations within 30 NM of the primary airport of Class B airspace (the Mode C veil), from the surface up to 10,000 feet MSL, regardless of VFR or IFR status.
Why the other options are wrong
- A. ADS-B In is not required by regulation; only ADS-B Out is mandated in this airspace.
- C. A Mode C transponder alone no longer satisfies the requirement; ADS-B Out is also mandated in this airspace.
- D. Both transponder and ADS-B Out equipment are required in this airspace.
ADS-B Out Requirement (91.225)
Regulation specifying where ADS-B Out equipment must be installed and operating for flight.
- Required in Class A, B, and C airspace
- Required within 30 NM of Class B primary airport (Mode C veil) up to 10,000 ft MSL
- Required above 10,000 ft MSL over the 48 states, excluding below 2,500 ft AGL
Memory trick: Mode C veil = 30-mile force field around the Class B fortress.