Abbreviations for ATC clearances

at or above

at or below

not above

not below

cleared through eastbound

cleared through westbound

direct

climb

descend

cross

XNG

crossing

XWND

crosswind

intercept

information passed

information passed and revised information passed

cancel IFR

# ( code)

squawk (transponder code)

@

at

at least one thousand feet on top

A

cleared to the airport for an approach (type of approach not specified)

AA ( runway id )

airport advisory - arrival (given)

ABM

abeam

ABV

above

ADZ

advise

AK

cleared to the (name) airport, contact approach

ALNOT

alert notice

ALTRV

altitude reservation

AO

cleared to the airport, VOR approach

AOA

at or above

AOB

at or below

AOD

cleared to the airport, VOR/DME approach

APSG

after passing

ARC C

ARC clockwise

ARC CC

ARC counter-clockwise

ASAP

as soon as possible

ATD

actual time of departure

AUTH

authorized

AV

cleared to the airport, visual approach

B

cleared out of controlled airspace

B ACA

cleared out of arctic control area

B HLA

cleared out of high-level airspace

BL

base leg

BLO

below

B NCA

cleared out of northern control area

BPOC

before proceeding on course

B SCA

cleared out of southern control area

BW

blower

CC ( time/event )

clearance cancelled if not airborne before (time/event)

CCT

circuits

CCZ

clear of (control) zone

CFI

close flight itinerary

CFP

close flight plan

CLB

climb

CMFA

clear of mandatory frequency area

CNA

climb not above

CNL

cancel

COC

climb on course

COMSEARCH

communications search

CS

centre stored

CSFPR

centre stored flight plan route

CSR

centre stored route

CTAM

climb to and maintain

CTC

contact

CVFR

controlled VFR flight

CX

clearance, cleared to

CZ

control zone

D

depart

D/C

down and clear

DA ( runway id )

airport advisory - departure (given)

DA

departure advisory (given)

DCT

direct(flight plan or clearance)

DEST

destination

DNCA

do not climb above

DNDU ( time/event )

do not depart until (time/event)

DR

depart runway

DRCO

dial-up RCO

DSC

descend

DTAM

descend to and maintain

DVFR

defense visual flight rules

DW

downwind

E

east

EAC ( time )

expect approach clearance at (time)

EACNL ( time )

expect approach clearance not later than (time)

EAT

estimated approach time

EB

eastbound

EBC

eastbound climbing

ECA

cleared to enter (or join) controlled airspace

EET

estimated elapsed time

EFC ( time )

expect further clearance at (time)

EH ( reason )

expect higher (reason)

EHATO

expect higher after takeoff

EHR

expect higher enroute

EMA

in the event of a missed approach

EST

estimate or estimating or estimated time over

ETA

estimated time of arrival

ETD

estimated time of departure

ETE

estimated time enroute

ETL

estimated time of landing

EXP

expecting, or expected

F

cleared to the airport (as a geographical location)