User guide

MST 67A Pilot’s Guide
Effective Date 7/04006-18301-0000 Rev 0
21
GLOSSARY OF 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.
BITE Built-In Test Equipment. A feature that con-
tinuously monitors itself for operational
errors.
FID Flight Identification
IDENT SPI pulse added to Mode A replies as
method for ground to identify transponder.
SPI info bit is set in Mode S and reported in
the Mode S replies.
Indicated Altitude Altitude shown on the altimeter with baro-
metric correction setting set to local sea
level pressure. Used by the crew below
18,000 feet.
LRU Line Replaceable Unit. A self-contained
avionics component that can be replaced in
the field.
Appendix