Owner's manual

006-08499-0000 Rev 7Effective Date 2/04
78
GLOSSARY OF TCAS TERMS
ABBREVIATIONS AND DEFINITIONS
AFMS Airplane Flight Manual Supplement
AGL Above Ground Level
ATC Air Traffic Control. A federally operated
ground based system that manages aircraft
traffic flow.
ATCRBS ATC Radar Beacon System. A ground
based secondary radar and airborne
transponder system used to monitor traffic.
Absolute Altitude Altitude above Mean Sea Level (MSL). See
Pressure Altitude.
Altitude Tag Data tag shown above or below threat sym-
bol giving the relative altitude or the flight
level of the intruder.
BITE Built-In Test Equipment. A feature of TCAS
that continuously monitors itself for opera-
tional errors.
CPA Closest Point of Approach. Refers to pre-
dicted point at which the intruder will be
closest to your own aircraft.
Crossover Climb,
Crossover Descent The maneuver that TCAS has determined
to be appropriate is a climb or descent
through the altitude of the threat aircraft.
The crew is alerted to the crossover maneu-
ver by an audio message.
FID Flight Identification
Appendix