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Acronyms and Abbreviations.
AC: alternating current
ACT: active (user waypoint or flight plan)
ADF: automatic direction finder
ANSI: American National Standards Institute
APT: airport
ARTCC: air route traffic control centre
ASCII: American standard code for information interchange
ATC: air traffic control
ATF: aerodrome traffic frequency
ATIS: automatic terminal information service
A/C: aircraft
baud: or Baud Rate; a measurement of data transmission speed
BRG: bearing
CAA: Civil Aviation Authority
CAS: calibrated airspeed
com: communication
CDI: course deviation indicator
CTA: control area
CTAF: common traffic advisory frequency
CTR: centre
CWI: continuous wave interference
dB: decibels
DC: direct current
DIS: distance
DME: distance measuring equipment
DOT: United States Department of Transportation
EFIS: electronic flight instrument system
ELT: emergency locator transmitter
ESA: en route safe altitude
ETE: estimated time en route
FAA: Federal Aviation Administration
FAF: final approach fix
FAR: Federal Aviation Regulations
FPL: flight plan
FPM: feet per minute
FSS: flight service station
ft: feet
FT: feet
G: gravitational acceleration = 32.2 ft/sec5 = 19.3 kt/sec5
GAL: gallons
GPS: Global Positioning System
hr: hour
HSI: horizontal situation indicator
Hz: hertz
IAF: initial approach fix
IAP: instrument approach procedure
IEEE: Institute of Electrical and Electronics Engineering
IFR: instrument flight rules
in.: inches
INT: intersection
kHz: kilohertz
Kt.: knots
KΩ: kilohms
LAT: latitude
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