AAR: Air-to-Air Receive AATR: Air-to-Air Transmit / Receive ABS: Absolute AC: Advisory Circular ADC: Air Data Computer ADF: Automatic Direction Finder ADI: Attitude Direction Indicator AE: Antenna Electronics AFCC: Automatic Flight Control Computer AFMSS: Air Force Mission Support System AGL: Above Ground Level AHRS: Attitude Heading Reference System AJB: Audio Junction Box Alm: Almanac ALMNAC: Almanac ALN: Align ALT: Altitude ALTN: Alternate AMLCD: Active Matrix Liquid Crystal Display AMS: Avionics Management System ANDVT: Advanced Narrowband Digital Voice Terminal ANVIS: Automated Night Vision Imaging System ANL: Analog ANN: Annunciation ANT: Antenna AOB: Angle of Bearing AP: Autopilot APPR: Approach APR: Approach APU: Auxiliary Power Unit ARINC: Aeronautical Radio Incorporated ARPT: Airport ASU: Antenna Switching Unit ATD: Along Track Distance ATT: Attitude ATTD: Attitude AUD: Audio AUTO: Automatic AVG: Average
BARO: Barometric BATT: Battery BC: Bus Controller BCD: Binary Coded Decimal BIT: Built-in Test BOC: Bottom of Climb BOD: Bottom of Descent BRG: Bearing BSIU: Bus Subsystem Interface Unit BW: Bandwidth Bfr: Buffer
CACD: Collins Avionics & Communications Division CADC: Central Air Data Computer CAL: Calibrate CART: Cartridge CAS: Caution / Advisory System CBIT: Continuous Built - In Test CDNU: Control Display Navigation Unit CD PS: Control Display Processor System CDS: Cockpit Display Subsystem CDU: Control Display Unit CEP: Circular Error Probable CGEM: CDU GPS Embedded Module CHNG: Change CIR: Circle CL: Climb CLR: Clear CMD: Commanded CNAV: Civil Navigation CNCLD: Cancelled CPCI: Computer Program Configuration Item CPN: Collins Part Number CPS: Commence Search Point CPU: Central Processing Unit CRP: Closed Random Pattern CRS: Course CSC: Computer Software Component CSCI: Computer Software Configuration Item CTRL: Control Cplt: Copilot
D/A: Digital to Analog DA: Day DA: Drift Angle
DCL: Declination DCP: Display Control Panel DCU: Data Concentrator Unit DDM: Difference in Depth of Modulation DEC: Decimal DEC: Digital Engine Controller DEGRAD: Degraded DESCNT: Descent DF: Direction Finder DF/OTPI: Direction Finder / On Top Position Indicator DG: Directional Gyro DGT: Digital DH: Decision Height DID: Data Item Description DIFF: Difference DIR: Direct-To DIS: Distance DIST: Distance DITS: Digital Information Transfer System DLDR: Data Loader DMA: Defense Mapping Agency DME: Distance Measuring Equipment DoD: Department of Defense DoT: Department of Transportation DPRAM: Dual Port RAM DPU: Display Processor Unit DRN: Document Release Notice DRS: Doppler Radar System DTG: Distance To Go DTK: Desired Track DWD: Doubleword
ECS: Environmental Control System ECU: Engine Control Unit EFC: Expect Further Clearance EFIS: Electronic Flight Instrument System EGI: Embedded GPS INU EGR: Embedded GPS Receiver EHE: Estimated Horizontal Error EHSI: Electronic Horizontal Situation Indicator EICAS: Engine / Instrument Caution Advisory System EIOM: Extended Input / Output Module ELEV: Elevation EMER: Emergency EMCON: Emergency Communications
ENAB: Enable ENDUR: Endurance EOF: Engine Oil Pressure EOT: Engine Oil Temperature EPE: Estimated Position Error ERR: Error ETA: Estimated Time of Arrival ETD: Estimated Time of Departure ETE: Estimated Time Enroute EVE: Estimated Vertical Error
FAA: Federal Aviation Administration FADEC: Full Authority Digital Electronic Control FAF: Final Approach Fix FAR: Federal Aviation Regulations FD: Flight Director FDC: Flight Director Computer FG: Figure FGRC: Flight Guidance & Roll Computer FL: Flight Level FLIR: Forward Looking Infrared RADAR FLT: Float Flt: Flight FLTR: Filter FMB: Flight Management Bus FMS: Flight Management System FMT: Frequency Managed Training FOM: Figure Of Merit FPLN: Flight Plan Fpm: Feet Per Minute FP: Flight Plan FQT: Formal Qualification Test ft: Feet FV: Flux Valve FWD: Forward
G: Guard GC: Gyrocompass GD: Guard GDOP: Geometric Dilution of Precision GEM: GPS Embedded Module GIG: GPS Integration Guide GND: Ground GPP: General Purpose Processor GPS: Global Positioning System
GS: Glideslope GS: Ground Speed GUARD: Guard GUV: Group Unique Variable GWT: Gross Weight
HC: Host Computer HDOP: Horizontal Dilution of Precision HDG: Heading HEX: Hexadecimal HF: High Frequency HIDD: Hardware Interface Design Data HLD: HOLD HQT: Havequick Training Net hr: Hour HS: High Speed Databus HSI: Horizontal Situation Indicator HUD: Head Up Display Hz: Hertz
IAF: Initial Approach Fix IAW: In Accordance With IAS: Indicated Air Speed IBIT: Initiated Built - In Test ICD: Interface Control Document ICS: Intercommunications System IDENT: Identification IDX: INDEX IFF: Identifiy Friend or Foe IFR: Instrument Flight Rules I/O: Input / Output IFF: Identify Friend or Foe ILS: Instrument Landing System in: Inches INAV: Integrated Navigation INB: Inbound INIT: Initialization INSR: Insert INTR: Intercept INU: Inertial Navigation Unit IRCM: Infrared Countermeasures ISA: International Standard Atmosphere
KEY: SA / AS Key KLBS: Kilopounds klbs: Kilopounds
Kts: Knots kts: Knots
LAT: Latitude LCD: Liquid Crystal Display LDR: Loader LIN: Linear L/L: Latitude / Longitude LOG: Localizer LONG: Longitude LRN: Long Range Navigation LRU: Line Replaceable Unit LS: Line Select
M1: Mode 1 M2: Mode 2 M3: Mode 3 M4: Mode 4 MAG: Magnetic MAG VAR: Magnetic Variation MAHP: Missed Approach Holding Point MAN: Manual MAP: Missed Approach Point MAR: Minimum Avionics Requirement MAX: Maximum Mb: Millibars MC: Mode C MDA: Minimum Descent Altitude MDL: Multipurpose Data Link MFP: Mission Flight Pattern MFSC: Multi Function Slew Controller MFD: Multi Function Display MGRS: Military Grid Reference System MHz: Megahertz MIC: Microphone MISC: Miscellaneous MIL: Military min: Minutes MKPT: Markpoint MO: Month MP: Mission Processor msec: Millisecond MSL: Mean Sea Level
MSN: Mission MVAR: Magnetic Variation MWOD: Multiple Words Of the Day NAR: Narrow NAV: Navigation NAV RAD: Navigation Radios NCD: No Computed Data NDB: Non-directional Beacon NGO: No-go NGO-A: No-go Bus A NGO-B: No-go Bus B NGO-T: No-go Both Busses nm: Nautical Miles NORM: Normal NTGS: Navigation Tactical Grid System NV: Non-Volatile NVG: Night Vision Goggle NVM: Non-Volatile Memory
OFFLOAD: Offload Fuel OFFST: Offset ONLOAD: Onload Fuel OR: Off Route ORIENT: Orientation ORNT: Orient OUT: Off (IFF) OFF: Operational Flight Program
PCA: Point of Closet Approach PFD: Primary Flight Display Pit: Pilot PREC: Precision PRES: Pressure PRESSR: Pressure PROM: Programmable Read Only Memory PS: Power Supply PSN: Position PTRN: Pattern PTS: Waypoints, Markpoints PTT: Push to Talk PVA: Position, Velocity, Acceleration
QTY: Quantity
RAD: Radiation RAIM: Receiver Autonomous Integrity Monitoring RAM: Random Access Memory RC: Roll Computer RDY: Ready RENUM: Renumber REQ: Required REV: Reversionary RF: Radio Frequency RMV: Remove RNAV: Area Navigation RNG: Range ROM: Read - Only Memory RPID: Reference Point Identifier RPLACE: Replace RPLY: Reply RPU: Receiver Processor Unit Rslts: Results RT: Remote Terminal RT: Receiver / Transmitter RTA: Required Time of Arrival RTCA: Radio Technical Commission for Aeronautics RTK: Racetrack RTN: Return RVRS: Reverse RVRSE: Reverse RWY: Runway
SA/AS: Selective Availability / Anti-Spoofing SAR: Search and Rescue SAT: Static Air Temperature SATS: Satellites SDP: Software Development Plan SDPP: Software Development Process Plan sec: Second SENS: Sensitivity SG: Symbol Generator SH: Stored Heading Alignment SID: Standard Instrument Departure SIM: Subsystem Interface Module SINCGARS: Single Channel Ground and Airborne Radio System SRS: Software Requirements Specification SRU: Shop Replaceable Unit SSDD: System / Segment Design Document SSS: System / Segment Specification
SSM: Sign / Status Matrix STAR: Standard Terminal Arrival Route STAT: Status STBY: Standby STD: Standard STP: Step STR: Steer Sync: Synchro
T1: Timer 1 T2: Timer 2 T3: Timer 3 TACAN: Tactical Air Navigation TACAS: Terrain Collision Avoidance System TAS: True Air Speed TBD: To Be Defined TCN: TACAN TDZ: Touchdown Zone TDZE: Touchdown Zone Elevation TF: Terminal Flag TGT: Turbine Gas Temperature TKE: Track Angle Error TKSP: Track Space Page TLF: Turkish Land Forces TN: Turkish Navy TNAV: Time Navigation TOC: Top Of Climb TOD: Time Of Day TOD: Top of Descent TOT: Total Output Temperature TR: Transmitter/Receiver Tr: Transmit TR/G: Transmitter / Receiver Guard TSO: Technical Standard Order TST: Test TTG: Time-To-Go TTI: Time-To-Intercept TXT: Text
UDID: User Defined Identifier UHF: Ultra High Frequency UPDT: Update UPS: Universal Polar Stereographic UTC: Coordinated Universal Time UTM: Universal Transverse Mercator
UUT: Unit Under Test UVPROM: Ultra Violet Programmable Read-Only Memory
VAR: Variation VFR: Visual Flight Rules VG: Vertical Gyro VHF: Very High Frequency VNAV: Vertical Navigation VOR: Very High Frequency Omnidirectional Radio VORTAC: VOR TACAN VOR/ILS: Very High Frequency Omnirange / Instrument Landing System VPA: Vertical Path Angle VS WR: Voltage - Standing Wave Ratio V\UHF: Very / Ultra High Frequency
WAYPT: Waypoint WARN: Warning wc: Word Count WCA: Warning / Caution / Advisory WGS: World Geodetic System WOD: Word Of the Day WOW: Weight On Wheels WPT: Waypoint
XFER: Transfer XFR: Transfer Xmit: Transmit XTK: Crosstrack Deviation
yr: Year
ZERO: Zeroize ZFW: Zero Fuel Weight