A
A Absolute
A Alaskan Standard Time
A Amber
A Arctic (air mass)
A/A Air to Air
A/C Approach Control
A/G Air to Ground
A/H Already Had
AAC Alaskan Air Command
AAD Assigned Altitude Deviation
AADC Approach and Departure Control
AAF Army Air Field
AAITVL Arrival Aircraft Interval
AAL Above Aerodrome Level
AAL Alaskan Region
AAP Advise if Able to Proceed
AAR Airport Arrival Rate
AARTE Airport Acceptance Rate
AATM At All Times
AAWF Auxiliary Aviation Weather Facility
AAWTA Advise at What Time Able
AB Airborne
ABBR Abbreviate
ABCST Automatic Broadcast
ABD Aboard
ABI Advance Boundary Information
ABLCHG Airborne Launching
ABM Abeam
ABN Aerodrome Beacon
ABND Abandon
ABNDT Abundant
ABNML Abnormal
ABT About
ABV Above
AC Advisory Circular
AC Altocumulus
AC Assistant Chief
ACA Artic Control Area
ACARS Aircraft Communication Addressing and Reporting System
ACAS Airborne Collision Avoidance System
ACC Altocumulus Castellanus
ACC Area Control Center
ACCID Notification of Aircraft Accident
ACCT Account
ACCUM Accumulate
ACDNT Accident
ACDO Air Carrier District Office
ACE Central Region
ACES Access
ACFT Aircraft
ACID Aircraft Identification
ACK Acknowledge
ACL Altimeter Check Location
ACLD Above Clouds
ACLS Automatic Carrier Landing System
ACLT Accelerate
ACM Air combat maneuvers
ACN Aircraft Classification Number
ACN All Concerned Notified
ACNOT Accident Notice
ACP Acceptance (message type designator)
ACP Area Command Post
ACPT Accept
ACPY Accompany
ACR Air Carrier
ACRBT Acrobatic
ACRS Across
ACSL Standing Lenticular Altocumulus
ACT Active or Activated or Activity
ACT Air Combat Training
ACT Technical Center
ACTG Acting
ACTV Active
ACTVT Activate
ACW Aircraft Control and Warning
ACYC Anticyclonic
AD Aerodrome
ADA Advisory Area
ADAP Airport Development Aid Program
ADC Aerodrome Chart
ADCF Air Defense Control Facility
ADCON Advise or issue instructions to all concerned
ADCUS Advise Customs
ADDN Addition
ADE Air Defense Emergency
ADF Automatic Direction Finder
ADFAP Automatic Direction Finder Approach
ADIZ Air Defense Identification Zone
ADJ Adjacent
ADL Aggregate Demand List
ADLO Air Defense Liaison Officer
ADLY Arrival Delay
ADMAP Advise by Air Mail as Soon as Possible
ADMIN Administration
ADMIR Administrator
ADMIS Aircraft Departing at (number of minutes) Interval
ADMIV Administrative
ADNL TFC Additional Traffic
ADNOK Advise if not correct
ADO Aerodrome Office (specify service)
ADO Airport District Office
ADP Automatic Data Processing
ADPE Automatic Data Processing Equipment
ADPS Automatic Data Processing Systems
ADQT Adequate
ADR Advisory Route
ADR Airport Departure Rate
ADRDE Advise Reason for Delay
ADRNDCK Adirondack
ADRT Alternate Departure Route
ADS Address
ADS Air Defense Sector
ADS Automatic Dependent Surveillance
ADSPN Advise Disposition
ADSU Automatic Dependent Surveillance Unit
ADV Advise
ADVALT Allotment Advice
ADVC Advice
ADVCTN Advection
ADVN Advance
ADVY Advisory
ADVZY Advisory
ADW Air Defense Warning
ADZ Advise
ADZAR Advise Arrival
ADZI Advise Intentions
ADZOF Advise This Office
ADZY Advisory
AEA Eastern Region
AEM Aircraft and Engine Mechanic
AENG Airways Engineer
AER Approach End Runway
AERO Aeronautical
AES Aircraft Earth Station
AEU Europe Africa and Middle East Office
AEVAC Air Evacuation
AEW Airborne Early Warning
AFB Air Force Base
AFC Area Forecast Center
AFCT Affect
AFD Airport Facility Directory
AFDK After Dark
AFIL Filed Flight Plan in the Air
AFIO Authorization for Interceptor Operations
AFIRM Affirmative
AFIS Aerodrome Flight Information Service
AFJ Air Force Jet
AFM Affirmative
AFNEA Air Force NOTAM Exchange Area
AFNEO Air Force NOTAM Exchange Office
AFOVRN Air Force Overrun (1000ft standard approach lighting system)
AFREP Air Force Representative
AFRT Air Freight
AFS Aeronautical Fixed Service
AFSS Automated Flight Service Station
AFT After
AFTN Aeronautical Fixed Telecommunications Network
AFTN Afternoon
AG Air Ground
AGA Aerodromes Air Routes and Ground Aids
AGACS Automatic Ground Air Ground Communication System
A-GEAR Arresting Gear
AGL Above Ground Level
AGL Great Lakes Region
AGN Again
AGR Agree
AGRMT Agreement
AHD Ahead
AI Arrival Approved Request for IFR Flight
AIA Advise if Able
AIATSC All International Air Traffic Switching Centers
AIC Aeronautical Information Circular
AID Airport Information Desk
AIDC Air Traffic services Inter facility Data Communication
AIFP Activate IFR Flight Plan
AILS Automatic Instrument Landing System
AIM Airman’s Information Manual
AIP Aeronautical Information Publication
AIRAC Aeronautical Information Regulation and Control
AIRCOMNET Air Force Communications Network
AIREP Air Report
AIRFL Air Refueling
AIRMET Airmen's Meteorological Information
AIROPNET Air Operations Network
AIS Aeronautical Information Service
AIS Aeronautical Information Specialist
AIS Airport in sight
AL All Field Offices and Personnel
AL Annual Leave
AL/At Least (altitude)
ALA Alighting Area
ALACFO All Air Carrier Field Offices
ALADLO All Air Defense Liaison Officers in Service Area
ALAFFO All Technical Operations
ALANO All Accident Notice Offices
ALARTC All Air Route Traffic Control Centers in Service Area
ALAT All Air Traffic Service Personnel in Service Area
ALATAS All Air Traffic (area) Supervisors in Service Area
ALATF All Air Traffic Field Facilities
ALATFO All Air Traffic Field Offices
ALCKT All Offices Having Send−receive Teletypewriter Service on Circuit
ALCS/C All Air Traffic Combined Station/ Centers in Service Area
ALCS/T All Air Traffic Combined Station/ Towers in Service Area
ALCT Attempt to Locate
ALDA Air Line Dispatchers Association
ALERFA Alert Phase Code (alerting service)
ALF Aloft
ALFAB All Offices on NADIN
ALFSFO All Flight Standards Field Offices
ALFSS All Flight Service Stations in Service Area
ALG Along
ALGHNY Allegheny
ALIATSC All International Aeronautical Telecommunication Switching Centers
ALIFO All International Field Offices
ALIFSS All International Flight Service Stations in Service Area
ALNMT Alignment
ALNOT Alert Notice
ALP Airport Layout Plan
ALPA Air Line Pilots Association
ALQDS All Quadrants
ALR Alerting
ALRAFAC All Radar Facilities in Service Area
ALRGN All Regional Service Area Offices
ALS Approach Light System
ALSEC All Sectors
ALSF Approach Lighting System With Sequenced Flashing Lights
ALSF1 Approach Lighting System With Sequenced Flashers Cat 1
ALSF-1 Approach Lighting System With Sequenced Flashers Cat 1
ALSF2 Approach Lighting System With Sequenced Flashers Cat 2
ALSF-2 Approach Lighting System With Sequenced Flashers Cat 2
ALSFI Approach Lighting System With Sequenced Flashers Cat 1
ALSF-I Approach Lighting System With Sequenced Flashers Cat 1
ALFSII Approach Lighting System With Sequenced Flashers Cat 2
ALSF-II Approach Lighting System With Sequenced Flashers Cat 2
ALSTG Altimeter Setting
ALT Altitude
ALTA Alberta
ALTM Altimeter
ALTN Alternate
ALTPT Alternate Airport
ALTRV Altitude Reservation
ALTWR All Towers in Service Area
ALUTN Aleutian
ALWF Actual Wind Factor
AM Ante Meridiem
AMA Area Minimum Altitude
AMB Ambiguity
AMC Air Mobility Command
AMC Mike Monroney Aeronautical Center
AMCL Amended Clearance
AMD Amend
AMD Amended Forecast
AMDT Amendment
AMECH Account Mechanical
AMGR Airport Manager
AMIS Aircraft Movement Information Services
AMOS Automatic Meteorological Observing System
AMP Amplifier or Amplify
AMPLTD Amplitude
AMRF Amended Route of Flight
AMS Aeronautical Mobile Service
AMS Air Mass
AMS American Meteorological Society
AMSL Above Mean Sea Level
AMSS Aeronautical Mobile Satellite Service
AMT Amount
AMVER Automated Mutual Assistance Vessel Rescue System
ANC Aeronautical Chart
ANCPT Anticipate
ANCS Aeronautical Navigation Chart Small Scale
ANE New England Region
ANF Air Navigation Facility
ANG Air National Guard
ANLYS Analysis
ANM Northwest Mountain Region
ANMS Automatic Network Management System
ANNC Announce
ANR Advanced Navigation Routes
ANRA Air Navigation Radio Aids
ANS Answer
ANT Antenna
AO1 ASOS Automated Observation Without Precipitation Discriminator (rain/snow)
AO2 ASOS Automated Observation With Precipitation Discriminator (rain/ snow)
AOA At or Above
AOAF At or After
AOB At or Below
AOBF At or Before
AOC Aerodrome Obstacle Chart
AOC Airport Operating Certificate
AOCP Aircraft Out of Commission for Parts
AOE Airport of Entry
AOPA Aircraft Owners and Pilots Association
AP Airport
AP Anomalous Propagation
APAP Approach Path Alignment Panel
APAP This list is copywritten and belongs to proairpilot
APAPI Abbreviated Precision Approach Path Indicator
APC Area Positive Control
APCH Approach
APDC Aircraft parking/docking chart
APL Airport Lights
APLCN Appalachian
APN Apron
APNT Appoint
APP Approach Control
APP Approach Control Office
APPA Advise Present Position and Altitude
APPR Appear
APR Airports Program Report
APREQ Approval Request
APRNT Apparent
APROP Appropriate
APRX Approximate
APS Airborne Pulse Search Radar
APSG After Passing
APV Approve
APVL Approval
AR Atlantic Route
ARAC Area Airports Checked
ARAC Army Radar Approach Control Facility
ARAD Altitude Radial
ARB Air Reserve Base
ARC Area chart
ARCP Air Refueling Control Point
AREP Air Refueling Egress Point
AREX Air Refueling Exit
ARFF Aircraft Rescue and Fire Fighting
ARFFOK Airport Rescue and Fire Fighting Alarm Checked
ARFOR Area Forecast
ARINC Aeronautical Radio Incorporated
ARIP Air Refueling Initial Point
ARL Aerial
ARLO Army Liaison Officer
ARMET Forecast upper wind and temperature at specified points
ARML Airmail
ARND Around
ARNG Arrange
ARNOT Area Notice
ARO Air Traffic Services Reporting Office
ARO Airport Reservations Office
ARP Aerodrome Reference Point
ARP Airport Reference Point
ARP Airport Reservation Position
ARP Air Report
ARPT Airport
ARQ Automatic Error Correction Equipment
ARR Arrival or Arrive
ARS Air Rescue Service (USAF)
ARS Special Air Report
ARSA Airport Radar Service Area
ARSR Air Route Surveillance Radar
ARST Arrest
ARTC Air Route Traffic Control
ARTCC Air Route Traffic Control Center
ARTS Automated Radar Terminal Systems
ARU Airborne Radar Unit
ARU Airspace Reservation Unit
ARUNK Arrival Unknown
AS Altostratus
AS/R Automatic Send/Receive
ASAP As Soon As Possible
ASC Ascent to
ASCU Automatic Scanning Control Unit
ASD Airspace Docket
ASDA Accelerate Stop Distance Available
ASDE Airport Surface Detection Equipment
ASE Altimetry System Error
ASGN Assign
ASI Altimeter Setting Indicator
ASIP Airspace Flight Inspection Pilot
ASL Above Sea Level
ASMD Assumed
ASN Antenna Structure Number
ASND Ascend
ASO Southern Region
ASOS Automated Surface Observing System
ASP Airport System Plan
ASP Airspace
ASPH Asphalt
ASR Airport Surveillance Radar
ASSOC Associate
ASST Assistant
ASW Southwest Region
ATA Actual Time of Arrival
ATA Air Transport Association of America
ATAM At and Maintain
ATAR Above Transmitted as Received Air Traffic Control
ATC Air Traffic Control
ATCA Air Traffic Control Association
ATCA ATC Advises
ATCAA ATC Assigned Airspace
ATCBI ATC Beacon Interrogator
ATCC ATC Clears
ATCF ATC Facility
ATCH Attach
ATCOR ATC Operations Representative
ATCR ATC Requests
ATCRBS ATC Radar Beacon System
ATCS ATC Specialist
ATCSCC David J. Hurley Systems Command Center
ATCT Airport Traffic Control Tower
ATD Actual Time of Departure
ATFC Account Traffic
ATFM Air Traffic Flow Management
ATIS Automatic Terminal Information Service
ATLC Atlantic
ATM Air Traffic Management
ATM Authentication Maneuver
ATMT Attempt
ATMTC Attempt to Contact
ATN Aeronautical Telecommunications Network
ATND Attend
ATO Aeronautical Telecommunications Operator
ATO Air Traffic Organization
ATOG Allowable Takeoff Gross Weight
ATP Actual Time of Penetration
ATP Air Traffic Procedures
ATPAC Air Traffic Procedures Advisory Committee
ATR Air Transport Rating
ATREP Air Traffic Representative
ATRLS Actual Time of Release
ATSCCP Air Traffic Service Contingency Command Post
ATT American Telephone and Telegraph Company
ATTM At This Time
ATTN Attention
AT-VASIS Abbreviated T Visual Approach Slope Indicator System
ATZ Aerodrome Traffic Zone
AUGRA Authority Granted
AURBO Aurora Borealis
AUREQ Authority is Requested
AUTH Authority
AUTH Authorized
AUTO Automatic
AUTOB Automatic Weather Reporting System
AUW All Up Weight (gross weight)
AUX Auxiliary
AUZ Authorize
AVANA Altitude reservation void for aircraft not airborne by
AVBL Available
AVFP Activate VFR Flight Plan
AVFPNO Pilot failed to activate VFR/DVFR flight plan
AVG Average
AVGAS Aviation Gasoline
AVN Aviation
AWA Advise When Able
AWANS Aviation Weather and NOTAM System
AWBE Automatic Weather Broadcast Equipment
AWE Advise When Established
AWL All Weather Landing
AWOS Automatic Weather Observing/ Reporting System
AWP Aviation Weather Processors
AWP Western-Pacific Region
AWS Air Weather Service (USAF)
AWT Await or Awaiting
AWX Account Weather
AWY Airway
AXPS Air Express
AZM Azimuth
AZRAN Azimuth and Range Data
B
B Base Leg
B Beginning of precipitation (time in minutes) (weather reports only)
B Bering Standard Time (time groups only)
B Blue
B Center clearance delivered
BA Braking Action
BAC Below All Clouds
BACLIN Baroclinic or Baroclinic Prognosis
BAFVC Bids Accepted for the Following Vacancies
BAL Balance
BASE Cloud Base
BASOPS Base Operations Office
BATROP Barotropic or Barotropic Prognosis
BC Back Course
BC Beginning Climb
BC British Columbia
BC Patchy
BCFG Patchy fog
BCH Beach
BCKG Backing
BCM Back Course Marker
BCM Become
BCN Beacon
BCREQ Broadcast Requested
BCST Broadcast
BCSTN Broadcast Station
BDA Bermuda
BDAT Beacon Data (digitized)
BDR Border
BDRY Boundary
BDSLD Bids Solicited
BECMG Becoming
BFDK Before Dark
BFR Before
BGN Began or Begin
BGND Begin or Beginning Descent
BHND Behind
BIFR Before Encountering IFR Conditions
BINOVC Breaks in Overcast
BKN Broken
BL Blowing
BLD Build
BLDG Building
BLDU Blowing Dust
BLDUP Buildup
BLKHLS Black Hills
BLKT Blanket
BLN Balloon
BLO Below
BLO Below Clouds
BLSA Blowing Sand
BLSN Blowing Snow
BLW Below
BLX Block
BLZD Blizzard
BMBR Bomber
BMS Basic Meteorological Services
BND Bound
BNDRY Boundary
BNTH Beneath
BOMB Bombing
BOVC Base of Overcast
BPOC Before Proceeding On Course
BPS Bytes Per Second
BPT Beginning Procedure Turn
BR Bahama Route
BR Branch
BR Mist
BRAF Braking Action Fair
BRAG Braking Action Good
BRAN Braking Action Nil
BRAP Braking Action Poor
BRF Brief
BRG Bearing
BRGT Bright
BRITE Bright Radar Indicator Tower Equipment
BRK Break
BRKG Braking
BRKHIC Breaks in Higher Overcast
BRKSHR Berkshire
BRM Barometer
BS Commercial Broadcasting Station
BSAF Bids Solicited as Follows
BSC Bird Sweep Completed
BSHP Beginning Standard Holding Procedure
BSIAP Beginning Straight In Approach
BSRAP Beginning Standard Range Approach
BSRO Begin Standard Refuel Orbit
BT Back Taxiing
BTL Between Layers
BTN Between
BTR Better
BTWN Between
BUEC Backup Emergency Communication
BUIC Backup Interceptor Control
BUL Bulletin
BUR Bureau
BUS Business
BY Blowing Spray (weather reports only)
BYD Beyond
BZR Buzzer (radar)
C
C Celsius
C Central Standard Time (time groups only)
C Centre (runway ID)
C Circling (approach and landing charts)
C Continental (air mass)
C/A Coarse/Acquisition
CA Clear Above (PIREP only)
CAAS Class A Airspace
CAC Change to Approach Control
CAC Changing to Approach Control
CAC Contact Approach Control
CACT Civil Air Carrier Turbojet
CADO Chief Airport District Office
CAM Canadian Armed Forces Transport Command
CAN Canada
CANFORCE Canadian Armed Force
CANO Catalogue Number
CANOT Canadian NOTAM
CANR Canadian NORAD Region
CAO Change of Appointing Office
CAP Civil Air Patrol
CAP/IS Combined Approach Control/International Station
CAPD Climb at Pilot’s Discretion
CAPT Captain
CARA Check Area Airports
CARF Central Altitude Reservation Function
CARIB Caribbean
CARU Canadian Airspace Reservation Unit
CAS Calibrated Airspeed
CAS Collision Avoidance System
CASCDS Cascades
CAT Category
CAT Clear Air Turbulence
CATX Climb and Cross
CAUFN Caution Advised Until Further Notice
CAVOK Cloud and Visibility OK
CAVU Clear or scattered clouds and visibility greater than ten miles
CAWS Common Aviation Weather Subsystem
CB Cumulonimbus
CBAS Class B Airspace
CBMAM Cumulonimbus Mamma
CBSA Class B Surface Area
CC Carbon Copy
CC Cirrocumulus
CCA Continental Control Area
CCAS Class C airspace
CCC Central Computer Complex
CCC Regional Communications Control Center
CCD City (or County) Civil Defense Director____
CCFP Collaborative Convective Forecast Product
CCLDS Clear of Clouds
CCLKOB Counterclockwise Orbit
CCLKWS Counterclockwise
CCRU Complete Crew
CCRZ Climb and Cruise
CCSA Class C Surface Area
CCSL Standing Lenticular Cirrocumulus
CCTLR Chief Controller
CCUS Cleared Customs
CD Candela
CD Civil Defense
CD Clearance Delivery
CDAS Class D Airspace
CDC Computer Display Channel
CDFNT Cold Front
CDM Collaborative Decision Making
CDN Coordination
CDO Communications Duty Officer
CDSA Class D Surface Area
CE Communications Equipment
CEAS Class E Airspace
CELNAV Celestial Navigation
CENGR Civil Engineer
CENPAC Central North Pacific
CER Climb En Route
CERAP Combined Center/RAPCON
CERT Certificate
CERTIF Certification
CESA Class E Surface Area
CF Change Frequency
CFA Controlled Firing Area
CFAD Composite Flight Data Processing
CFADC Canadian Forces Air Defense Command
CFAP Cleared for Approach
CFM Confirm
CFN Confine
CFP Cold Front Passage
CFPL Carryover From Previous Log
CFR Code of Federal Regulations
CFWSU Central Flow Weather Service Unit
CFY Clarify
CG Coast Guard
CGAS Class G Airspace
CGAS Coast Guard Air Station
CGL Circling Guidance Light
CGLS Coast Guard LORAN Station
CGSTN Congestion
CH Channel
CH Channel continuity check of transmission to permit comparison of record of channel sequence numbers of messages received on the channel
CHAP Chapter
CHARC Characteristic
CHC Chance
CHG Change
CHGO Changing Over
CHM Chemicals
CHNL Channel
CHOK Check Okay
CHOV Changeover
CHRG Charge
CHSPK Chesapeake
CHTR Charter
CI Cirrus
CIC Controller in Charge
CIDIN Common Data Interchange Network
CIFP Cancel IFR Flight Plan
CIFR Cancel IFR Clearance Previously Given
CIFRR Common IFR Room
CIG Ceiling
CINCNORAD Commander in Chief North American Aerospace Defense Command
CIRNAV Circumnavigate
CIRNOT Circuit Notice
CIRVIS Communications Instructions for Reporting Vital Intelligence Sightings
CIT Near or over large towns
CIV Civil
CK Check
CKT Circuit
CL Centre Line
CL Closing Station
CL Course Line
CLA Clear type of ice formation
CLB Climb
CLBI Climb Immediately
CLBN Crash Locator Beacon
CLBR Calibration
CLD Cloud
CLG Calling
CLKOB Clockwise Orbit
CLKWS Clockwise
CLN Colon
CLNC Clearance
CLODA Closing Date
CLOTO Close This Office
CLR Clear
CLRAP Cleared as Planned
CLRS Clear and Smooth
CLSD Closed
CLST Celestial
CLU Circuit Line Up
CM Centimeter
CMA Comma
CMB Climb to or climbing to
CMNC Commence
CMPCT Compact
CMPL Complete or completed or completion
CMPLT Complete
CMPLX Complex
CMPSN Composition
CMPT Component
CMS Construction Maintenance Supervisor
CMSN Commission
CNCL Cancel
CNCNT Concurrently
CNCT Connect
CNDN Canadian
CNL Cancel
CNLFP Cancel Flight Plan
CNS Communications Navigation and Surveillance
CNS Consolidated NOTAM System
CNSTNT Consistent
CNTR Center
CNTRL Central
CNTRLN Centerline
CNVG Converge
CNVRT Convert
CNVSN Conversion
CNVTV Convective
CO Company
CO County
COB Close of Business
COC Climb on Course
COLL Collect
COM Communication
COMB Combine
COML Commercial
COMLO Compass Locator
COMPR Compare
COMPRT Compartment
CONC Concrete
CONCA Continue Calling Until
COND Condition
CONF Confidential
CONFDC Confidence
CONFIG Configuration
CONFIGN Configuration
CONR Continental NORAD Region
CONS Continuous
CONSO CONSOLAN Facility
CONSOL Consol Beacon
CONSOLAN Low or medium frequency long range navigational aid
CONST Construction
CONT Continue or continued
CONTDVD Continental Divide
CONTH Continue to Hold
CONTR Contract
CONTRAILS Condensation Trails
COORD Coordinate
COORD Coordinates
COP Changeover Point
COPCOM Controllers’ Operations and Procedures Committee
COPT Completed Procedure Turn
COR Correct or corrected or correction
CORAS Corridor Assignment
COREQ Confirming Requisition Follows
COT At the coast
COV Cover
CP Circular Polarization
CPA Crash Phone Activated
CPBL Capable
CPD Coupled
CPDLC Controller Pilot Data Link Communications
CPF Complete Power Failure
CPL Current Flight Plan
CPME Calibration Performance Monitoring Equipment
CPN Air Transport Pulse Radar Navigation Aid
CPS Air Transport Pulse Radar Search
CPTY Capacity
CRAD Composite Radar Data Processing
CRAF Civil Reserve Air Fleet
CRC Circle
CRC Cyclic Redundancy Check
CRCHF Crew Chief
CRLC Circulate
CRS Course
CRT Cathode Ray Tube
CRTFY Certify
CRYPTO Cryptographic
CRZ Cruise
CRZAM Cruise and Maintain
CRZWTR Cruise Well to Right
CS Call Sign
CS Cirrostratus
CS/C Combined Station/ Center
CS/T Combined Station/ Tower
CSATR Climb so as to reach
CSATX Climb so as to cross
CSDR Consider
CSDRBL Considerable
CSLDT Consolidate
CST Coast
CTA Control Area
CTAF Common Traffic Advisory Frequency
CTAM Climb to and maintain
CTAS Controlled airspace
CTAX Climb to and cross
CTC Contact
CTCC Change to Center Control or Changing to Center Control
CTCC Contact Center Control
CTCEN Contact Center
CTGY Category
CTL Control
CTLA Control Area
CTLB Control Boundary
CTLR Controller
CTLZ Control Zone
CTN Caution
CTR Control Zone
CTRAC Common Terminal Radar Approach Control
CTSKLS Catskills
CU Cumulus
CUF Cumuliform
CUFRA Cumulus Fractus
CUSNO Customs has been Notified
CUST Customs
CVFP Cancel VFR Flight Plan
CVINO Clearance Void if Not Off
CVN Convene
CVR Cockpit Voice Recorder
CVR Cover
CVRS Computerized Voice Reservation System
CW Continuous Wave
CWM Change Weight Manifest
CWRC Climb Well to Right of Course
CWSU Center Weather Service Unit
CWTR Climb Well to Right
CWY Clearway
CXA Cancel Approved Arrival
CXD Cancel Approved Departure
CYC Cyclonic
CYCLGN Cyclogenesis
CYL Cylinder
CZM Coastal Zone Management
