A Amps, Amperes

ABN Abnormal

AC Advisory Circular, Alternating Current

ACARS Aircraft Communications Addressing and Reporting System

ACC Accuracy

ACFT Aircraft

ACK Acknowledge

ACT, ACTV Active, Activate, Altitude Compensated Tilt

ADAHRS Air Data, Attitude and Heading Reference System

ADC Air Data Computer

ADF Automatic Direction Finder

ADI Attitude Direction Indicator

ADIZ Air Defense Identification Zone

ADM Administrative Domain

ADS-B Automatic Dependent Surveillance-Broadcast

ADS-C Automatic Dependent Surveillance-Contract

ADS-R Automatic Dependent Surveillance-Rebroadcast

AEA Aircraft Electronic Association

AF Arc to Fix Leg

AFCS Automatic Flight Control System

AFM Airplane Flight Manual

AFMS Airplane Flight Manual Supplement

AFN ATS Facilities Notification

AFRM Airframe

AFTN Aeronautical Fixed Telecommunication Network

A/G Air-to-Ground

AGL Above Ground Level

AHRS Attitude and Heading Reference System

AIM Aeronautical Information Manual

AIRB Airborne

AIRMET, AIRM Airman's Meteorological Information

AIRREP Air Reports

ALRT Alert, Alerting

ALT Altitude

ALT, ALTN Alternator, Alternate

ALTM Altimeter

ALTS Altitude Select, Selected Altitude Capture Mode

ALTV VNAV Altitude Capture Mode

AM Amplitude Modulation

AMP Amplifier, Ampere

AMPS Amperes

ANN/ANNUNC Annunciation/Annunciator

ANSP Air Navigation Service Provider

ANT Antenna

AOA Angle of Attack, ACARS Over AVLC

AOC Aeronautical Operational Control

AOG Aircraft On Ground

AOPA Aircraft Owners and Pilots Association

AP Autopilot

AP DISC Autopilot Disconnect

APPR, APR Approach, Approach Control

APT Airport, Aerodrome, Automatic Pitch Trim

APTSIGNS Airport Signs

APU Auxiliary Power Unit

APV Approaches with Vertical Guidance

ARINC Aeronautical Radio Incorporated

ARM Arm, Armed

ARR, ARV Arrival

ARSPC Airspace

ARTCC Air Route Traffic Control Center

AS Airspeed

ASB Aviation Support Branch

ASDA Accelerate-Stop Distance Available

ASI Airspeed Indicator

ASOS Automated Surface Observing System

AT Auto Throttle

ATAS ADS-B Traffic Advisory System

ATC Air Traffic Control

ATCRBS ATC Radar Beacon System

ATD Along-Track Distance

ATE Along-Track Error, Automatic Test Equipment

ATIS Automatic Terminal Information Service

ATK Along Track

ATN Aeronautical Telecommunications Network

ATS Air Traffic Services

ATT Attitude

ATZ Aerodrome Traffic Zone

AUD Audio

AUTO Automatic

AUTOSEQ Automatic Sequence

AUX Auxiliary

AVAIL Available

AVG Average

AVLC Aviation VHF Link Control

AWOS Automated Weather Observing System

AWY Airway

AZ Azimuth

B Both Runways

B ALT Barometric Altitude

BC, B/C Back Course

BARO Barometer, Barometric Setting

BATT Battery

Bearing The compass direction from the present position to a destination waypoint.

BFO Beat Frequency Oscillator

BKLT Backlight

BKSP Backspace

BKUP Backup

BLKHD Bulkhead

Bluetooth Wireless standard for data exchange over short distances

BOC Bottom of Climb

BOD Bottom of Descent

BRG see also Bearing

BRK Brake

BTM Bottom

°C Degrees Celsius

C Center Runway

CA Course to Altitude Leg

CAL Calibrated, Calibration

CALC Calculator

Calibrated Airspeed Indicated airspeed corrected for installation and instrument errors.

CAS Crew Alerting System

CAT Clear Air Turbulence

CAVS CDTI Assisted Visual Separation

CLB Climb

CB Circuit Breaker

CCG Current Climb Gradient

CD Course to DME Distance Leg

CDA Current Data Authority

CDI Course Deviation Indicator

CDU Control Display Unit

CDTI Cockpit Display of Traffic Information

CF Course to Fix Leg

CFG Configuration

CFIT Controlled Flight into Terrain

CG Center of Gravity

CH, CHNL Channel

CHK Check

CHKLIST Checklist

CHRG Charge

CHT Cylinder Head Temperature

CI Course to Intercept Leg

CIP Current Icing Potential

CL Class, Centerline

CLB Climb

CLD Cloud

CLG Ceiling

CLR Clear

CLS Close

CLTR Clutter

CM Centimeter, Context Management, Configuration Module

CMC Central Maintenance Computer

CMPRTR Comparator

CN Canada

CNCL Cancel

CNFM Confirm

CNI Communication, Navigation, & Identification

CNS Communication, Navigation, & Surveillance

CNXT Connext^®

CO Carbon Monoxide

COM Communication Radio

COMP Compensated, Compensation

CONFIG Configuration

CONUS Continental United States

COOL Coolant

COPLT Copilot

CORR Correct, Corrected, Correction

Course The line between two points to be followed by the aircraft.

Course to Steer The recommended direction to steer in order to reduce course error or stay on course. Provides the most efficient heading to get back to the desired course and proceed along the flight plan.

CP Copilot, Control Panel

CPDLC Controller Pilot Datalink Communications

CPL Couple

CR Course to Radial Leg

CRC Cyclic Redundancy Check

CRG Cockpit Reference Guide

CRNT Current

Crosstrack Error The distance the aircraft is off a desired course in either direction, left or right.

CRS see also Course, Course to Steer

CRSR Cursor

CRU, CRZ Cruise

CSA Conflict Situational Awareness

CSC Current Speed Control

CSTR Constraint

CTA Control Area

CTAF Common Traffic Advisory Frequency

CTR Center, Controlled Traffic Region

CTRL Control

Cumulative, CUM The total of all legs in a flight plan.

CVDR Cockpit Voice Data Recorder

CVFP Charted Visual Flight Procedure

CVR Cockpit Voice Recorder

CVRG Coverage

CVS Combined Vision System

CWS Control Wheel Steering

CYC CTR Cyclic Centering

CYL Cylinder

CZ Control Zone

D->, Direct-To

D/A Digital to Analog Converter

D ALT Density Altitude

D-ATIS Digital Automatic Terminal Info Service

DA Decision Altitude, Drift Angle

DB, DBASE Database

DBZ Decibels 'Z' (Radar Return)

DCL Departure Clearance

DCLTR, DECLTR Declutter

DEC Declination

DEC FUEL Decrease Fuel

DEG Degree

DEIC, DEICE De-icing

DEL Delete

DEP Departure, Departure Control

DESC Descent

Desired Track The desired course between the active "from" and "to" waypoints.

DEST, DES Destination, Destination Airport Identifier

DET Detect, Detected, Detection, Detector

DEV Deviation

DF Direction Finder, Direct-to Fix Leg

DFLT Default

DG Directional Gyro

DGPS Differential GPS

DGRD Degrade

DH Decision Height

DIFF Differential

DIG Digital

Dilution of Precision A measure of GPS satellite geometry quality on a scale of one to ten (lower numbers equal better geometry, where higher numbers equal poorer geometry).

DIR Direction

DIS Distance

DISC Disconnect

DISENG Disengage

DISP, DSPL Display

Distance The 'great circle' distance from the present position to a destination waypoint.

DIV Divert, Diversion

DL LTNG Datalink Lightning

DLS Data Link System

DME Distance Measuring Equipment

DN Down

DNALT Density Altitude

DNGR Danger

DNLK Downlink

DOD Department of Defense

DOP see also Dilution of Precision

DOPP Doppler

DP Departure Procedure, Differential Pressure

DPRT Departure

DQR Data Quality Requirements

DR Dead Reckoning

DSBL Disabled

DSP Display, Datalink Service Provider, Digital Signal Processor

DTG Distance To Go, Remaining distance to last active FPL waypoint

DTK see also Desired Track

DWNGRADE Downgrade

E Empty, East

EAS Engine and Airframe Systems

EC Error Correction

ECC Error Correcting Code

ECL Electronic Checklist

ECR Excessive Closure Rate

ECS Environmental Control System, or Electrical Control System

ECU Engine Control Unit

EDM Emergency Descent Mode

EDR Excessive Descent Rate

EEP Expanded Envelope Protection

EFB Electronic Flight Bag

EFC Expected Further Clearance

EFVS Enhanced Flight Vision System

EGNOS European Geostationary Navigation Overlay Service

EGT Exhaust Gas Temperature

EHS Enhanced Surveillance

EICAS Engine Indication and Crew Alerting System

EIS Engine Indication System

ELEC Electrical

ELEV Elevation, Elevator

ELT Emergency Locator Transmitter

EMER, EMERG, EMERGCY Emergency

EMI Electromagnetic Interference

END, ENDUR Endurance

Endurance Flight endurance, or total possible flight time based on available fuel on board.

ENG Engine

ENGA Engage

ENGD Engaged

ENR Enroute; ETE to Final Destination

Enroute Safe Altitude (ESA) Uses Grid MORAs to find a safe altitude within ten miles left or right of the desired course on an active flight plan or direct-to.

ENT Enter

EP Envelope Protection

EPE see also Estimated Position Error

EPU Estimated Position Uncertainty

ERR Error

ES Extended Squitter

ESA Emergency Safe Altitude, see also Enroute Safe Altitude

ESOSP Electronic Stability Overspeed Protection

Garmin ESP™ Electronic Stability and Protection

Estimated Position Error (EPE) A measure of horizontal GPS position error derived by satellite geometry conditions and other factors.

Estimated Time Enroute (ETE) The estimated time it takes to reach the destination waypoint from the present position, based upon current groundspeed.

Estimated Time of Arrival (ETA) The estimated time at which the aircraft should reach the destination waypoint, based upon current speed and t rack.

ET Elapsed Time

ETA see also Estimated Time of Arrival

ETD Estimated Time of Departure

ETE see also Estimated Time Enroute

EVS Enhanced Vision Sensor

EXCIT Excitation

EXP Expand

EXPIRD Expired

EXT External

EXTD Extend, Extended

EXTING Extinguish, Extinguisher

EXTR Extract, Extraction

°F Degrees Fahrenheit

FA Course From Fix to Altitude Leg

FAA Federal Aviation Administration

FADEC Full Authority Digital Engine Control

FAF Final Approach Fix

FAIL Failure

FANS Future Air Navigation System

FAP Final Approach Point

FAPP Final Approach

FAR Federal Aviation Regulations

FBO Fixed Base Operator

F/C Flight Crew

FC Course From Fix to Distance Leg

FCC Federal Communication Commission

FCE Flight Control Equipment

FCST Forecast

FCTN Function

FD Flight Director, Course From Fix to DME Distance Leg

FDE Fault Detection and Exclusion

FDR Flight Data Recorder

FF, FFLOW see also Fuel Flow

FIS-B Flight Information Services-Broadcast

FISDL Flight Information Service Data Link

FIT Flight Into Terrain

FL Flight Level

FLC, FLCH Flight Level Change

FLT Flight, Flight Timer

FLTA Forward Looking Terrain Avoidance

FLW Follow, Following

FM Course From Fix to Manual Termination Leg

FMS Flight Management System

FOB see also Fuel On Board

FOD see also Fuel Over Destination

FPA Flight Path Angle

FPBFD Flight Path Based Flight Director

FPL Flight Plan

FPM Feet Per Minute, Flight Path Marker

FR From

FREQ Frequency

FRMT Format

FRT Front

FRZ Freezing

FS Flight Stream

FSD Full-Scale Deflection

FSM Flight System Messages

FSS Flight Service Station

FT Foot/Feet

Fuel Flow The fuel flow rate, expressed in units of fuel per hour.

Fuel On Board The total amount of usable fuel on board the aircraft.

Fuel Over Destination The estimated fuel remaining when the aircraft reaches the destination waypoint, based upon current fuel flow.

FWD Forward

G/A Ground to Air

G/S Glideslope

GA Go-Around

GAGAN GPS Aided GEO Augmented Navigation

GAGL GPS AGL Altitude

GAL, GL Gallon(s)

GBAS Ground Based Augmentation System

GBOX Gearbox

GBT Ground Based Transceiver

GCS Ground Clutter Suppression

GCSS Garmin Connext Satellite Services

GCU Garmin Control Unit

GDC Garmin Air Data Computer

GDL Garmin Satellite Data Link

GDM Garmin Distance Measuring Equipment

GDR Garmin Data Radio

GDU Garmin Display Unit

GEA™ Garmin Engine/Airframe Unit

GEAR Landing Gear

GEN Generator

GEO Geographic

GFC Garmin Flight Control

GHD™ Garmin Head Up Display

GHZ Gigahertz

GIA Garmin Integrated Avionics Unit

GIFD Garmin Integrated Flight Deck

GLONASS Global Orbiting Navigation Satellite Landing System

GLS Global Navigation Satellite Landing System

GMA™ Garmin Audio Panel System

GMC Garmin Mode Controller

GMT Greenwich Mean Time

GMU Garmin Magnetometer Unit

GND Ground

GNSS Global Navigation Satellite System

GOLD Global Operational Data Link

GP Glidepath

GPH Gallons per Hour

GPN Garmin Part Number

GPS Global Positioning System

GPWS Ground Proximity Warning System

GRA™ Garmin Radar Altimeter

GRC Garmin Remote Control

Grid MORA (Minimum Off-Route Altitude) One degree latitude by one degree longitude in size and clears the highest elevation reference point in the grid by: a) 1,000 feet where the highest elevation is <5001MSL or b) 2,000 feet where the highest elevation is >5000MSL

Ground Track See Track Groundspeed The velocity the aircraft is traveling relative to a ground position.

GRP Geographic/Ground Reference Point

GRS Garmin Reference System

GRT Garmin Radio Transceiver

GS Ground Speed, Glideslope

GSA Garmin Servo Adapter

GSB™ Garmin USB Ports

GSD Glideslope/Glidepath Deviation, Garmin Data Concentrator

GSL Geometric/Geodetic Sea Level

GSR Garmin Satellite Radio

GSU Garmin Sensor Unit

GTC Garmin Touchscreen Controller

GTS™ Garmin Traffic System

GTX™ Garmin Transponder

GW Gross Weight

GWX™ Garmin Weather Radar

H Hours

H+MM Hours and Minutes

HA Hold Terminating at Altitude Leg

HAL Horizontal Alert Limit

HAT Height Above Threshold

HDD Head Down Display

HDG see also Heading

HDOP Horizontal Dilution of Precision

Heading The direction an aircraft is pointed, based upon indications from a magnetic compass or a properly set directional gyro.

HF High Frequency, Hold Terminating at Fix Leg

HFOM see also Horizontal Figure of Merit

HG Mercury

HI High

HI SENS High Sensitivity

HLD Hold, Holding, Holding Pattern

HM Hold with Manual Termination Leg

HNS Hybrid Navigation Sensor

Horizontal Figure of Merit A measure of the uncertainty in the aircraft's horizontal position.

HOV Hover

HOV-P Hover Prediction

HP High Pressure, Horsepower

HPA Hectopascal

HPI Hover Power Indicator

HPL Horizontal Protection Level

HR Hour

HRZN HDG Horizon Heading

HSC High Speed Cruise

HSDB High-Speed Data Bus

HSI Horizontal Situation Indicator

HT Heat, Height

HTR Heater

HUD Head Up Display

HUL Horizontal Uncertainty Level

HWND Headwind

HYD Hydraulic

HZ Hertz (cycles per second)

HZN Horizon

I Inner Marker

IAF Initial Approach Fix

IAP Instrument Approach Procedure

IAS Indicated Air Speed

IAT Indicated Air Temperature

IATA International Air Transport Association

IAU Integrated Avionics Unit

IBD, INBD Inboard

ICAO International Civil Aviation Organization

ICE Icing

ICS Intercom System

ID Identification/Morse Code Identifier

IDENT, IDNT Identification

IEEE Institute of Electrical & Electronics Engineers

IF Initial Fix

IFR Instrument Flight Rules

IG Imperial Gallon

IGE In Ground Effect

IGRF International Geomagnetic Reference Field

IGW Increased Gross Weight

ILI Imminent Line Impact

ILS Instrument Landing System

IM Inner Marker

IMC Instrument Meteorological Conditions

IN Inch

IN HG, "HG Inches of Mercury

INACTV Inactive

INBD Inboard

INBND Inbound

INC FUEL Increase Fuel

IND Indicator, Indicated

Indicated Information provided by properly calibrated and set instrumentation on the aircraft panel.

INDX Index

INFO Information

INH, INHIB Inhibit

INIT Initialization

INOP Inoperative

INS Inertial Navigation System

INSTR Instrument

INT Intersection(s), Internal

INTEG Integrity (RAIM unavailable)

INTERN, INTRL Internal

INV Invalid

IOI Imminent Obstacle Impact

IR Infrared

IrDA, IRDA Infrared Data Association

IRST Infrared Surveillance and Tracking

ISA International Standard Atmosphere; ISA Relative Temperature

ISO International Standards Organization

ISOL Isolation

ITI Imminent Terrain Impact

ITT Inter-Turbine Temperature, Interstage Turbine Temperature

KEYSTK Key Stuck

KG Kilogram

KHZ Kilohertz

KIAS Knots Indicated Airspeed

KM Kilometer

KT Knot

L Left, Left Runway

LAHSO Land And Hold Short Operations

LAT Latitude, Lateral

LB Pound

LBL Label

LCD Liquid Crystal Display

LCL Local

LDA Landing Distance Available, Localizer Type Directional Aid

LDG Landing, ETA at Final Destination

LED Light Emitting Diode

Leg The portion of a flight plan between two waypoints.

LEN Length

LGND Legend

LIFR Low Instrument Flight Rules

LI-ION Lithium Ion

LIM Limit

LMM Locator Middle Marker

LNAV Lateral Navigation

LO Low

LOA Letter of Authorization

LOC Localizer

LOI Loss of Integrity (GPS)

LOM Locator Outer Marker

LON, LONG Longitude, Longitudinal

LP Localizer Performance, Low Pressure

LPV Localizer Performance with Vertical Guidance

LRC, LRCR Long Range Cruise

LRG Large

LRU Line Replaceable Unit

LSB V Lower Sideband Voice

LT Left, Light

LTNG Lightning

LVL Level

M Meter, Middle Marker, Mach

Mach Number the ratio of the true airspeed to the speed of sound.

MAG Magnetic

MAG VAR Magnetic Variation

MAHP Missed Approach Hold Point

MAINT Maintain

MAL Malfunction

MAN Manual

MAN IN Manifold Pressure (inches Hg)

MAN SQ Manual Squelch

MANSEQ Manual Sequence

MAP Missed Approach Point

MAPROC Missed Approach Procedure

MASQ Master Avionics Squelch

MAX Maximum

MAXSPD Maximum Speed (overspeed)

MB Marker Beacon, Millibar(s)

MCDU Multifunction Control and Display Unit

MCLB Maximum Climb Thrust

MCP Maximum Continuous Power

MCRZ Maximum Cruise Thrust

MCT Maximum Continuous Thrust

MDA Barometric Minimum Descent Altitude

MEA Minimum Enroute Altitude

MEM Memory

MEPT Manual Electric Pitch Trim

MERT Manual Electric Roll Trim

MET Manual Electric Trim

METAR Aviation Routine Weather Report

METRO Metropolitan

MEYT Manual Electric Yaw Trim

MFI Multi-Function Instrument

MFD Multi Function Display

MFW Multi Function Window

MGRS Military Grid Reference System

MGT Measured Gas Temperature

MHz Megahertz

MIC Microphone

MID Middle

MIN Minimum, Minute

MKR Marker Beacon

MM Middle Marker

M_MO (V_MO) Maximum Speed

MOA Military Operations Area

MOD Modification, Modify

MON Monitor, Monitored, Monitoring

MORA Minimum Off-Route Altitude

MOV Movement

MPEL Maximum Permissible Exposure Level

MPM Meters per Minute

MSA Minimum Safe Altitude

MSAS Multi-functional Satellite Augmentation System

MSG Message

MSL Mean Sea Level

MT, M Meter

MTG Mounting

MTN Mountain

MTOGW Maximum Takeoff Gross Weight

MTOW Maximum Takeoff Weight

MV Millivolt(s)

MVFR Marginal Visual Flight Rules

MXCR Maximum Cruise

N North

NATS North Atlantic Tracks System

NAV Navigation

NAVAID Navigation Aid

NCR Negative Climb Rate

NDA Next Data Authority

NDB Non-Directional Beacon

NEG Negative

NEXRAD Next Generation Radar

NG Gas Producer Rotation Speed

NM Nautical Mile(s)

NMPG Nautical Miles per Gallon

NoPT No Procedure Turn Required (procedure shall not be executed without ATC clearance)

NORM Normal

NOTAM Notice To Air Missions

NP Power Turbine Speed

NPA Non-Precision Approach

NR Rotor Speed

NRST Nearest

NWHL Nosewheel

NWS National Weather Service, Nosewheel Steering

O Outer Marker

OAT Outside Air Temperature

OBD, OUTBD Outboard

OBS Omni Bearing Selector, Observation, Observe, Observed

OBSCR Obscuration

OCL Oceanic Clearance

OEM Original Equipment Manufacturer

OFST Offset

OGE Out of Ground Effect

OM Outer Marker

OOOI Out of the gate, Off the ground, On the ground, and In the gate

OROCA Off Route Obstacle Clearance Altitude

OSP Overspeed Protection

OUTBD Outboard

OUTBND Outbound

OVBD Overboard

OVFL Overflow

OVFLY Overfly, Overflying

OVHD Overhead

OVHT Overheat

OVLIM Overlimit

OVLD Overload

OVPR Overpressure

OVR, OVRD Override

OVRN Overrun

OVSPD Overspeed

OVTMP Overtemperature

OXY Oxygen

P ALT Pressure Altitude

P-ATT Pitch Attitude

PA Precision Approach, Passenger Address, Proximity Advisory

PB Push Button

PASS, PAX Passenger(s)

PC Personal Computer

PCL Pilot Controlled Lighting

PDA Premature Descent Alerting

PDC Pre-Departure Clearance

PED Portable Electronic Device

PERF Performance

PFD Primary Flight Display

PFT Preflight Test

PFW Primary Flight Window

PG Pilot's Guide

PI Procedure Turn to Course Intercept Leg

PIREP Pilot Report

PIT, PTCH Pitch

PLT Pilot

PNR Prior Notice Required

POA Plain Old ACARS

POB Persons (Souls) on Board

POF Phase of Flight

POH Pilot's Operating Handbook

POHS Pilot's Operating Handbook Supplement

POS, POSN Position

POSS Possible

PPH Pounds per Hour

PPM Parts per Million

PPOS, P. POS Present Position

PREFLT Preflight

PRES, PRESS, P Pressure

PREV Previous

PRI, PRIM Primary

PRL Parallel

PRN Pseudo Random Noise

PROC Procedure(s), Procedure Turn

PROP Propeller

PROX Proximity

PSI Pounds per Square Inch, Power Situation Indicator

PT Procedure Turn, Part Time

PTK Parallel Track

PTT Push-to-Talk

PWR Power

Q Engine Torque

QFE Field Elevation Pressure

QNE Pressure Altitude

QNH Sea Level Pressure

QTY Quantity

R Right, Right Runway

RA Resolution Advisory, Radio Altimeter, Radar Altimeter

RAD Radial

RAD ALT Radio Altimeter, Radar Altimeter

RAIM Receiver Autonomous Integrity Monitoring

RAM Random Access Memory

RAT Ram Air Temperature

RCR Recommended Cruise

RCVR Receiver

R/D Radial/Distance

RDR Radar

REC Record, Recorder

RECIRC Recirculate/Recirculating

REF Reference

REGL Regulator

REM Remaining (fuel remaining), Reminder, Removed, Remote

REQ Request

REQD, REQ'D Required

RES Reserve (fuel reserve entered by pilot)

REST Restricted, Restriction

RET Return

RETD Retard

REV Reverse, Revision, Revise

RF Radio Frequency, Constant Radius Turn to Fix Leg

RFM Rotorcraft Flight Manual

RLC Required Line Clearance

RMI Radio Magnetic Indicator

RMT Remote

RNAV Area Navigation

RNG Range

RNP Required Navigation Performance

RNWY, RWY Runway

ROA Runway Occupancy Awareness

ROAAS Runway Overrun Awareness and Alerting System

ROC Required Obstacle Clearance, Rate of Climb

ROD Rate of Descent

ROL Roll

ROM Read Only Memory

ROT Rotary

RPM Revolutions Per Minute

RQRD Required

RST FUEL Reset Fuel

RSV Reserve (fuel reserve entered by pilot)

RT Right

RTC Required Terrain Clearance

RTE Route

RTR Router

RUDICS Router-Based Unrestricted Digital Interworking Connectivity Solution

RVRSNRY Reversionary

RVSI Required Vertical Speed Indicator

RVSM Reduced Vertical Separation Minimums

RX Receive

S South

SA Selective Availability

SAIB Special Airworthiness Information Bulletin

SAR Search and Rescue

SAT Static Air Temperature

SATCOM Satellite Communication

SBAS Satellite-Based Augmentation System

S-CLB Step Climb

SC Short Circuit

SCIT Storm Cell Identification and Tracking

S-DES Step Descent

SD Secure Digital

SDF Simplified Directional Facility

SEC Second(s), Secondary

SECT Section

SEG Segment

SEL, SLCT Select

SELCAL Selective Calling

SENS Sense, Sensitivity, Sensor

SEQ Sequence, Sequencing

SERL Serial

SERV Service, Servicing, Served

SET Setup

SFC Surface

SFD Standby Flight Display

SHT Short

SIAP Standard Instrument Approach Procedures

SID Standard Instrument Departure

SIG Signal

SIG/AIR SIGMET/AIRMET

SIGM SIGMET

SIGMET Significant Meteorological Information

SIM Simulator

SITA Societe Internationale de Telecommunications

SLD Supercooled Large Droplet

SLP/SKD Slip/Skid

SLW Slow

SM Statute Mile

SMBL Symbol

SMK Smoke

SMS Short Message System

SNGL Single

SOB Souls on Board

SPBK Speed Brake

SPC Space

SPD Speed

SPI Special Position Identification

SPKR Speaker

SQ, SQL Squelch

SRVC, SVC Service

SSEC Static Source Error Correction

SSID Wireless Service Set Identifier

SSR Secondary Surveillance Radar

STAB Stabilization

STAL Stall

STAR Standard Terminal Arrival Route

STAT Status

STATS Statistics

STBY Standby

STC Sensitivity Time Constant, Supplemental Type Certificate

STD Standard

STN Station

STR Strip

STRMSCP Stormscope^®

SUA Special Use Airspace

SUB Substitute

SUPPRESS Suppression

SURF Surface

SUSP Suspend

SVBL Serviceable

SVO Servo

SVT™™ Synthetic Vision Technology

SW Software

SWPS Stall Warning Protection System

SYN TERR Synthetic Terrain

SYN VIS Synthetic Vision

SYNC Synchronize

SYNTH Synthesizer

SYS System

T True

T HDG True Heading

T/R Thrust Reverser

TA Traffic Advisory, Transition Altitude

TAC Tactical, Terminal Area Chart

TACAN, TCN Tactical Air Navigation System

TAF Terminal Aerodrome Forecast

TAS True Airspeed, Traffic Advisory System

TAT Total Air Temperature

TAWS Terrain Awareness and Warning System

TC Table of Contents

TCA Terminal Control Area

TCAS Traffic Alert Collision Avoidance System

TCH Threshold Crossing Height

TCS Touch Control Steering

TD Touchdown

TEL Telephone

TEMP, TMP Temperature

TERM Terminal

TERR Terrain

T/F To/From

TF Track Between Two Fixes Leg

TFR Temporary Flight Restriction

TGT Target

TH True Heading

THLD Threshold

THR Thrust

TIS Traffic Information Service

TIS-B Traffic Information Service-Broadcast

TIT Turbine Inlet Temperature

TIZ Traffic Information Zone

TKE see also Track Angle Error

TL Transition Level

TLA Throttle Lever Angle, Thrust Lever Angle

TMA Terminal Maneuvering Area

TMR/REF Timer/Reference

TNK Tank

TO To, Takeoff

TOC Top of Climb, Table of Contents

TOD Top of Descent, Time to TOD

TOGA, TO/GA Take-Off, Go-Around

TOLA Takeoff and Landing Assistant

TOLD Takeoff and Landing Data

TOPO Topographic

TORA Takeoff Run Available

TOT Total

TPA Traffic Pattern Altitude

Track Direction of aircraft movement relative to a ground position; also 'Ground Track'.

Track Angle Error The angle difference between the desired track and the current track.

TRFC Traffic

TRK see also Track

TRM Trim

TRN Terrain

TRSA Terminal Radar Service Area

TRUNC Truncated

TSO Technical Standard Order

TST Test

TTA Time-to-Alert

TTK True Track

TTL Total

TTS Text to Speech

TUR Turbine

TURB Turbulence

TURN Procedure Turn

TWND Tailwind

TWIP Terminal Weather Information for Pilots

TWR Tower

TWY Taxiway

TX Transmit

UA Routine PIREP

UAT Universal Access Transceiver

UAV Unmanned Airborne Vehicle

UHF Ultra-High Frequency

UNABL Unable

UNAVAIL Unavailable

UNLIM Unlimited

UPLK Uplink

US United States

USB V Upper Sideband Voice

USP Underspeed Protection

USR User

UTC Coordinated Universal Time

UTM/UPS Universal Transverse Mercator/ Universal Polar Stereographic Grid

UUA Urgent PIREP

V Volts, Vertical

V DEV Vertical Deviation

V, Vspeed Velocity (airspeed)

V₁ Takeoff Decision Speed

V₂ Takeoff Safety Speed

V_A Maneuvering Speed

VA Heading Vector to Altitude Leg

VAC Volts Alternating Current

VAL Vertical Alert Limit

V_APP VOR Approach Mode

V_APP , V_AC Approach Climb Speed

VAR Variable, Variation

VCO Voice Call Out

VD Heading Vector to DME Distance Leg

VDC Volts Direct Current

VDI Vertical Deviation Indicator

VDL VHF Datalink

V_E, V_ENR Enroute Climb Speed

VECT Vector

VERT Vertical

Vertical Figure of Merit A measure of the uncertainty in the aircraft's vertical position.

Vertical Speed Required The vertical speed necessary to descend/ climb from a current position and altitude to a defined target position and altitude, based upon current groundspeed.

V_FE Maximum Flap Extended Speed

VFOM see also Vertical Figure of Merit

VFR Visual Flight Rules

VHF Very High Frequency

VI Heading Vector to Intercept Leg

VIB Vibration

V_LE Maximum Landing Gear Extended Speed

V_LNDx Approach Speed (Flaps at x°)

V_LO Maximum Landing Gear Operating Speed

VLD Valid

VLOC, VOR/L VOR/Localizer Receiver

VM Heading Vector to Manual Termination Leg

V_MC Minimum Control Speed

VMC Visual Meteorological Conditions

V_MO (MMO) Maximum Operating Speed

VNAV, VNV Vertical Navigation

V_NE Never-Exceed Speed

VOL Volume

VOLT Voltage

VOR VHF Omnidirectional Range

VOR/D VOR/DME

VOR/I VOR/ILS

VORTAC VHF Omnidirectional Range Station and Tactical Air Navigation

VPATH, VPTH Vertical Path

VPL Vertical Protection Level

VPROF VNAV Profile, Vertical Profile

V_R Takeoff Rotate Speed

VR Heading Vector to Radial Leg

V_REF Landing Approach Speed, Reference Landing Speed

VRP Visual Reporting Point

VS Vertical Speed

V_SB Maximum Speedbrake Speed

VSD Vertical Situation Display

VSI Vertical Speed Indicator

VSM Vertical Separation Minima

V_SR Stall Speed

VSR, VS REQ see also Vertical Speed Required

V_T Takeoff Flap Retraction Speed

VTE Vertical Track Error

VTF Vector to Final

VTK Vertical Track

V_TIRE Maximum Tire Speed

V_X Best Angle of Climb Speed

V_Y Best Rate of Climb Speed

V_YSE Best Single-Engine Rate of Climb Speed

W Watt(s), West

WAAS Wide Area Augmentation System

WARN Warning

WATCH^® Weather Attenuated Color Highlight

WB Weight & Balance

WDIR Wind Direction

WEP Wired Equivalent Privacy

WSPD Wind Speed

WGS-84 World Geodetic System - 1984

WI-FI, WIFI Wireless Local Area Network based on IEEE 802.11

WILCO Will Comply

WNDSHR, WSHEAR Windshear

WL Wings Level

WOG Weight on Gear

WOW Weight on Wheels

WPA Wi-Fi Protected Access

WPT Waypoint(s)

WT Weight

WUXGA Widescreen Ultra Extended Graphics Array

W/V Wind Velocity

WW World Wide

WX Weather

WXR Weather Radar

XFD Crossfeed

XFER, XFR Transfer

XFLOW Crossflow

XM LTNG SiriusXM Lightning

XMIT Transmit

XMSN Transmission

XPDR Transponder

XTALK Cross-Talk

XTE Crosstrack Error

XTK Cross-Track, Crosstrack Error

YD Yaw Damper

Z Reflectivity Factor

ZPL Zero Pitch Line