General
GLOSSARY
AL250 Flight Manual
MEP
0-6 GLOSSARY
This is not intended as a complete list of aeronautical terminology, but is an explanation of
some of the terms used in this manual.
AC: Alternating current
ADC: Air data computer
ADF: Automatic direction finding
ADI: Attitude and direction indicator
AHRS: Attitude heading reference system
ALS: Approach Light System
AOA: Angle Of Attack (degrees)
AP: Autopilot
ATC: Air traffic control
BITD: Basic Instrument Training Device
BOW: Basic Operating Weight
BRG: Bearing
CAS: Calibrated Airspeed means the indicated speed of an aircraft, corrected for p osit ion and
instrument error. Calibrated airspeed is equal to true airspeed in standard atmosphere
at sea level.
CAT: Clear Air Turbulence
CAT I: ILS Category I approach procedure which provides for an approach to a decision
height not lower than 200 feet (60m) and a vi sibil ity not less than 2,400 feet (800m)
or a Runway Visual Range not less than 1,800 feet (550m).
CAT II: (Special authorization required) ILS Category II approach procedure which provides
for an approach to a decision height lower than 200 feet (60m) but not lower than 100
feet (30m) and a Runway Visual Range not less than 1,200 feet (350m).
CAT III: (Special authorization required) ILS Category III approach procedure which provides
for an approach with either a decision height lower than 100 feet (30m) or with no
decision height and with a Runway Visual Range not less than 700 feet (200m).
C/B: Circuit breaker
CDI: Course Deviation Indicator
DC: Direct current
DME: Distance measuring equipment
EAT: Entering Air Temperature
ECU: Engine Control Unit. Computer that measures all the necessary parameters for FADEC
calculations.
Rev. 1.8 © 2021 ALSIM - All Rights Reserved 0-8
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