Definitions Acronyms

From FlightGear wiki
Revision as of 12:31, 20 April 2006 by Hellosimon (Talk | contribs)

(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to: navigation, search
A/C 
Air Craft, or simply airplane
A/P 
Autopilot
A/T 
Autothrottle, A/P Subsystem that controls the throttle
ADF 
Automatic Direction Finder, tuned to NDB
AGL 
Above Ground Level, height above the Ground over which you are currently flying
Apt Elev 
Airport Elevation, the MSL of a central point of an airport
ASOS 
Automated Surface Observation System, measures and broadcasts surface wheather info automatically
ATIS 
Automatic Terminal Information Service
BC 
Back Course, part of ILS, beacon that provides range information, like OM/MM/IM, specifies FAF for back course, a back course is non-precison since no ; G/S associated
CDI 
Course Deviation Indicator, part of a VOR gauge, a needle showing whether you are on course (centered) or not (left or right)
CTAF 
Common Traffic Advisory Frequency. Available at airfields with no operational control tower.
DG 
Directional Gyro
DH 
Decision Height, point on G/S where to decide to continue landing or missed approach, similar to MDA, for precision approaches, determined by altimeter, lowest height where an approach can be flown by instrument alone
DME 
Distance Measuring Equipment, measures the distance(slant, not on-ground distance) to the tuned in VOR,
EFATO 
Engine Failure after take-off - usually resulting in a force-landing.
EICAS 
Engine Indication and Crew Alerting System
FAF 
Final Approach Fix
FD 
Flight Director, horizontal and vertical bars on your PD
G/S 
Glideslope, provides vertical guidance during ILS, UHF, always goes together with LOC, usually 3deg, usable 10NM from field
GPS 
Global Positioning System, allows a very exact measuring of location all over the world, based on satellites
IAF 
Initial Approach Fix
IAP 
Intstrument Approach Plate, see Approach Plate, aka. Terminal Procedures
IATA 
an Airport Designator, used on Flight Tickets, Baggage,...
ICAO 
an Airport Designator, used for Navigation
IFR 
Instrument Flight Rules, 0-179: odd thousands, 180-359: even thousands
ILS 
Instrument Landing System
IM 
Inner Marker, part of ILS, beacon that provides range information, only for Cat II where it is the DH point, 100ft from runway threshold
LDA 
Localizer-type Directional Aid, similar to LOC, but offset from runway heading, the approach path is not lined up with runway
LNAV 
Lateral Navigation,
LOC 
Localizer, provides lateral guidance during ILS, VHF, always goes together with G/S, usable 18NM from field
LOC-A 
an approach plate that ends with a letter indicates that a circling approach is required
MALSR 
Medium intensity Approach Lighting System with Runway alignment indicator lights, a type of Runway Approach lighting
MAP 
Missed Approach Point, touch down zone of runway
MDA 
Minimum Descend Altitude, during an approach, this specifies the minimum Altitude (MSL) before the runway is in sight and a safe landing can be made
MEA 
Mean Enroute Altitude
MIRL 
Medium Intensity Runway Lights
MLS 
Microwave Landing System
MM 
Middle Marker, part of ILS, beacon that provides range information, 3500ft from runway threshold
MOCA 
Minimum Obstruction Clearance Altitude
MSA 
Minimum Safe Altitude, provides minimum of 1000ft clearance from obstructions and terrain
MSL 
Mean Sea Level, Standardized height figure, Altimeters show the current A/C height over MSL
Navaid 
Helper for navigation, eg: NDB, Fixes, VOR, GPS
ND 
Navigation Display
NDB 
Non Directional Beacon, LW, sends out Morse code of its ID, reception only reliable > 1000ft AGL
OAT 
Outside Air Temperature, the temperature of undisturbed air, derived by correcting TAT for compressibility errors
OBS 
Omni Bearing Selector, part of a VOR gauge, used to rotate the course card
OM 
Outer Marker, part of ILS, beacon that provides range information, 4-7NM from runway threshold
PAPI 
Precision Approach Path Indicator, similar to VASI, but more precise, uses four lights
PD 
Primary Display
PF 
Pilot Flying, the person that currently controls the airplane, can be either Captain or F/O
PFL 
Practice Forced Landing. Practise approach carried out to a suitable field. No landing is made.
PIREP 
Pilot Report (abbreviated UA in the briefing teletype, UUA is urgent PIREP)
PNF 
Pilot Non-Flying, the person who's not the PF
RAT 
Ram Air Temperature, the raw, non-corrected temp. as measured by the temperature probe. Errors due to the Ram effect (air compressed in the probe) and the position (air may be disturbed by parts of the airplane, and also due to the effect of the air compression in front of the plane) RAT may also describe a Ram Air Turbine; a device deployed into the airstream on large aircraft to provided minimum electrical power in the event of generator-failure.
RMI 
Radio Magnetic Indicator
RNAV 
Area Navigation, flying by longitude/latitude points that are not radio navigation aids, GPS or IRS is usually used.
RTO 
Rejected Takeoff
RVR 
Runway Visibility Range,
SAT 
Static Air Temperature, same as OAT
SDF 
Simple Directional Facility,
SID 
Standard Instrument Departure, for takeoffs, specifies the route from the runway to the first waypoint
STAR 
Standard Terminal Arrival, for landings, speciefies the route from the last waypoint down to the runway
TACAN 
Tactical Air Navigation, military
TAT 
Total Air Temperature, this is derived by correcting the RAT for position. Still contains an error due to the compressibility of air inside the temperature probe.
TDZE 
Touch Down Zone Elevation, the MSL of the touch down point of a runway
TOGA 
Take-Off / Go-Around. Automatic single-switch operation of throttle for Take-off / Go-Around Power.
T&P(s) 
Temperatures and pressures relating to engine systems.
UNICOM 
Universal Communications. See also: CTAF
VOR 
VHF Omnidirectional Range
VFR 
Visual Flight Rules, 0-179: odd thousands+500ft, 180-359: even thousands+500ft
VNAV 
Vertical Navigation,
A/P VASI 
Visual Approach Slope Indicator, an approach lighting system, typically two lights left of the runway,
VORTAC 
VHF Omni-Directional Range/Tactical Air Navigation, military
WCA 
Wind Correction Angle