Whether altitude-hold mode is active. Undefined when mode status is not reported.
Whether approach mode is active. Undefined when mode status is not reported.
Whether the autopilot is engaged. Undefined when mode status is not reported.
Barometric pressure (altimeter) setting, in millibars/hectopascals. Undefined if not available.
Whether LNAV mode is active. Undefined when mode status is not reported.
Navigation Accuracy Category for Position, 0-15 (higher is more accurate).
Whether the reported altitude source meets the Navigation Integrity Category barometric requirement.
MCP/FCU or FMS selected altitude target, in feet. Undefined if not available.
Source of the selected altitude target - undefined when selectedAltitudeFt is unavailable.
Selected heading/track angle, in degrees. Undefined if not available.
Source Integrity Level, 0-3 (higher is more reliable).
Whether ACAS/TCAS is operational (not inhibited or failed). Always reported, regardless of mode status.
Whether VNAV mode is active. Undefined when mode status is not reported.
Decoded ADS-B Target State and Status (BDS 6,2, type code 29) - the pilot's selected altitude/heading targets, altimeter setting, and active autopilot/nav modes, per RTCA DO-260B section 2.2.3.2.7.1.