ADS-B Automatic Dependent Surveillance Broadcast
As of January, 01, 2020, any airspace that requires the use of a Transponder will also require the aircraft to be equipped with ADS-B out.
IF YOU FLY IN THIS AIRSPACE YOU MUST BE EQUIPPED WITH ADS-B
AIRSPACE
ALTITUDE
Class A
Class B
Class C
Class E
Mode C Veil
All
Generally, from surface to 10,000 feet mean sea level (MSL) including the airspace from portions of Class Bravo that extend beyond the Mode C Veil up to 10,000 feet MSL (e.g. SEA, CLE, PHX)
Generally, from surface up to 4,000 feet MSL including the airspace above the horizontal boundary up to 10,000 feet MSL
Above 10,000 feet MSL over the 48 states and DC, excluding airspace at and below 2,500 feet AGL
Over the Gulf of Mexico at and above 3,000 feet MSL within 12 nautical miles of the coastline of the United States
Airspace within a 30 NM radius of any airport listed in Appendix D, Section 1 of Part 91 (e.g. SEA, CLE, PHX) from the surface up to 10,000 feet MSL
