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Definitions, Acronyms & Abbreviations
Leg Mode: navigation of a route by picking the most direct route
between waypoints along the route.
OBS Course Mode: selecting a course to a waypoint based on setting
a specific bearing "to" or "from" the waypoint.
Special Use Airspace (SUA): any of the following: prohibited area,
restricted area, warning area, alert area, MOA, Class A through G,
unknown, danger, caution, training, CTA, or TMA type.
Tailwind: difference between ground speed and true airspeed when
ground speed is more than true airspeed.
Track (TRK): angle of the aircraft's path over the ground measured
clockwise relative to north.
ACRONYMS AND ABBREVIATIONS
AAS:
Aeronautical Advisory Service
ACT:
Active (user waypoint or flight plan)
ADF:
Automatic Direction Finder
AFIS:
Aerodrome Flight Information Service
AGL:
Above Ground Level
ALT:
Altitude
AMR:
Americas data area
ANSI:
American National Standards Institute
APR:
Approach
APT:
Airport
ARTCC: Air Route Traffic Control Center
ARVL:
Arrival
ASOS:
Automated Surface Observation System
ATC:
Air Traffic Control
ATF:
Aerodrome Traffic Frequency
ATI:
Atlantic International data area
ATIS:
Automatic Terminal Information Service
AWOS:
Automated Weather Observing System
A/C:
Aircraft
BRG:
Bearing
Rev 2 Apr/2004
A-2
KMD 250 Pilot's Guide
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