A0 : No ADS-B emitter category information. Do not use this emitter category. If no emitter category fits your installation, seek guidance from the FAA as appropriate.
A1 : Light (< 15500 lbs) – Any airplane with a maximum takeoff weight less than 15,500 pounds. This includes very light aircraft (light sport aircraft) that do not meet the requirements of 14 CFR § 103.1.
A2 : Small (15500 to 75000 lbs) – Any airplane with a maximum takeoff weight greater than or equal to15,500 pounds but less than 75,000 pounds.
A3 : Large (75000 to 300000 lbs) – Any airplane with a maximum takeoff weight greater than or equal to 75,000 pounds but less than 300,000 pounds that does not qualify for the high vortex category.
A4 : High vortex large (aircraft such as B-757) – Any airplane with a maximum takeoff weight greater than or equal to 75,000 pounds but less than 300,000 pounds that has been determined to generate a high wake vortex. Currently, the Boeing 757 is the only example.
A5 : Heavy (> 300000 lbs) – Any airplane with a maximum takeoff weight equal to or above 300,000 pounds.
A6 : High performance (> 5g acceleration and 400 kts) – Any airplane, regardless of weight, which can maneuver in excess of 5 G’s and maintain true airspeed above 400 knots.
A7 : Rotorcraft – Any rotorcraft regardless of weight.
B0 : No ADS-B emitter category information
B1 : Glider / sailplane – Any glider or sailplane regardless of weight.
B2 : Lighter-than-air – Any lighter than air (airship or balloon) regardless of weight.
B3 : Parachutist / skydiver
B4 : Ultralight / hang-glider / paraglider – A vehicle that meets the requirements of 14 CFR § 103.1. Light sport aircraft should not use the ultralight emitter category unless they meet 14 CFR § 103.1.
B5 : Reserved
B6 : Unmanned aerial vehicle – Any unmanned aerial vehicle or unmanned aircraft system regardless of weight.
B7 : Space / trans-atmospheric vehicle
C0 : No ADS-B emitter category information
C1 : Surface vehicle – emergency vehicle
C2 : Surface vehicle – service vehicle
C3 : Point obstacle (includes tethered balloons)
C4 : Cluster obstacle
C5 : Line obstacle
C6 : Reserved
C7 : Reserved