|
Contraction
|
Definition
|
Usage
|
|
S
|
South or
southern latitude
|
ICAO
|
|
S/A
|
semiannual
|
GEN
|
|
S/RC
|
send/receive center
|
GEN
|
|
SA
|
duststorm,
sandstorm, rising dust or
sand |
METAR
|
|
SA
|
record
observation (weather
reports only)
|
NWS
|
|
SA
|
sandstorm
or dusting
|
ICAO
|
|
SA
|
surveillance approach
|
GEN
|
|
SABH
|
simultaneous automatic
broadcast homer
|
GEN
|
|
SADT
|
same
direction traffic
|
GEN
|
|
SAFI
|
semiautomatic flight
inspection
|
GEN
|
|
SAFI
|
semiautomatic flight
inspection aircraft
|
GEN
|
|
SALS
|
short
approach lighting system
|
GEN
|
|
SALS
|
simple
approach lighting system
|
ICAO
|
|
SALSF
|
short
approach lighting system
with sequenced flashing
lights |
GEN
|
|
SAN
|
sanitary
|
ICAO
|
|
SAO
|
surface
aviation observation
|
NWS
|
|
SAP
|
as soon as
possible
|
ICAO
|
|
SAPD
|
speed at
pilots discretion
|
GEN
|
|
SAR
|
search and
rescue |
GEN
|
|
SARPS
|
standards
and recommended practices
|
ICAO
|
|
SASK
|
Saskatchewan
|
NWS
|
|
SATCOM
|
satellite
communication
|
ICAO
|
|
SATFY
|
satisfy or
satisfactory
|
GEN
|
|
SATR
|
so as to
reach |
ATC
|
|
SAVASI
|
simplified
abbreviated visual
approach slope indicator
|
GEN
|
|
SAWRS
|
supplementary aviation
weather reporting station
|
GEN
|
|
SAYTA
|
say time
able |
ATC
|
|
SB
|
southbound
|
ICAO
|
|
SBAS
|
satellite-based
augmentation system
|
ICAO
|
|
SBFC
|
standby
for further clearance
|
ATC
|
|
SBND
|
southbound
|
ATC
|
|
SBSD
|
subside
|
NWS
|
|
SC
|
stratocumulus
|
NWS
|
|
SCAN
|
selfcorrecting automatic
navigation
|
GEN
|
|
SCANO
|
automatic
scanning unit out of
service
|
GEN
|
|
SCAOK
|
automatic
scanning unit returned to
service
|
GEN
|
|
SCAT
|
security
control of air traffic
|
GEN
|
|
SCATANA
|
security
control of air traffic and
air navigation aids
|
GEN
|
|
SCC
|
System
Command Center
|
GEN
|
|
SCLN
|
semicolon
|
GEN
|
|
SCND
|
second (in
line) |
GEN
|
|
SCS
|
single
channel simplex
|
GEN
|
|
SCSL
|
standing
lenticular stratocumulus
|
NWS
|
|
SCT
|
scattered
|
NWS
|
|
SCTR
|
sector
|
GEN
|
|
SCTY
|
security
|
GEN
|
|
SDB
|
scheduled
data base
|
GEN
|
|
SDBY
|
standby
|
GEN
|
|
SDF
|
simplified
directional facility
|
GEN
|
|
SE
|
southeast
|
ICAO
|
|
SE
|
system
engineer
|
GEN
|
|
SEADRM
|
seadrome
|
GEN
|
|
SEB
|
southeastbound
|
ICAO
|
|
SEC
|
second
(time) |
GEN
|
|
SECMR
|
sector
manager
|
GEN
|
|
SECRA
|
secondary
radar |
GEN
|
|
SECT
|
sector
|
ICAO
|
|
SEL
|
space
environment laboratory
|
GEN
|
|
SELCAL
|
selective
calling
|
ATC
|
|
SELS
|
severe
local storms
|
NWS
|
|
SELY
|
southeasterly (weather
reports only)
|
NWS
|
|
SENS
|
sensitivity
|
GEN
|
|
SEPN
|
separation
|
GEN
|
|
SEQ
|
sequence
|
GEN
|
|
SER
|
service
|
ICAO
|
|
SERN
|
southeastern (weather
reports only)
|
NWS
|
|
SES
|
supervisory electronics
specialist
|
GEN
|
|
SESC
|
space
environment service center
|
GEN
|
|
SET
|
stack
entry time
|
ATC
|
|
SEV
|
severe
|
ICAO
|
|
SF
|
standard
form |
GEN
|
|
SFA
|
single
frequency approach
|
GEN
|
|
SFC
|
surface
|
ICAO
|
|
SFERICS
|
atmospherics
|
NWS
|
|
SFL
|
sequence
flashing lights
|
GEN
|
|
SFO
|
sector
field office
|
GEN
|
|
SFO
|
simulated
flame out
|
ATC
|
|
SFPP
|
stored
flight plan program
|
ATC
|
|
SFU
|
sector
field unit
|
GEN
|
|
SG
|
snow
grains (weather reports
only) |
METAR
|
|
SGD
|
signed
|
GEN
|
|
SGD
|
solargeophysical data
|
NWS
|
|
SGFNT
|
significant
|
GEN
|
|
SGL
|
signal
|
GEN
|
|
SH
|
showers
|
METAR
|
|
SHF
|
super high
frequency
|
GEN
|
|
SHFT
|
shift
(weather reports only)
|
NWS
|
|
SHGR
|
hail
showers
|
METAR
|
|
SHGS
|
hail showers (small)
|
METAR
|
|
SHLW
|
shallow
|
NWS
|
|
SHORN
|
short
range navigation system
|
GEN
|
|
SHP
|
standard
holding procedure
|
GEN
|
|
SHPL
|
ice pellet
showers
|
METAR
|
|
SHRA
|
rain
showers
|
METAR
|
|
SHRT
|
short
|
GEN
|
|
SHRTLY
|
shortly
|
NWS
|
|
SHRTWV
|
shortwave
|
GEN
|
|
SHSN
|
snow
showers
|
METAR
|
|
SHTDN
|
shutdown
|
GEN
|
|
SHUD
|
should
|
ATC
|
|
SHWR
|
shower
|
NWS
|
|
SI
|
straightin approach
|
GEN
|
|
SIA
|
standard
instrument approach
|
GEN
|
|
SIAP
|
standard
instrument approach
procedure
|
GEN
|
|
SID
|
standard
instrument departure
|
GEN
|
|
SIERNEV
|
Sierra
Nevada |
NWS
|
|
SIF
|
selective
identification feature
|
ICAO
|
|
SIG
|
signature
|
GEN
|
|
SIGMET
|
significant meteorological
information
|
GEN
|
|
SIGWX
|
significant weather
|
ICAO
|
|
SIM
|
simulated
approach
|
ATC
|
|
SIMUL
|
simultaneous
|
GEN
|
|
SIR
|
snow and
ice on runway
|
NWS
|
|
SIWL
|
single
isolated wheel load
|
ICAO
|
|
SJP
|
standard
jet penetration
|
GEN
|
|
SK
|
sky
condition (PIREP only)
|
ATC
|
|
SKC
|
sky clear
|
METAR
|
|
SKED
|
schedule
|
ICAO
|
|
SL
|
sea level
|
GEN
|
|
SL
|
sick leave
|
GEN
|
|
SLCT
|
select
|
GEN
|
|
SLD
|
solid
|
NWS
|
|
SLGT
|
slight
|
GEN
|
|
SLMM
|
simultaneous compass
locator at middle marker
|
GEN
|
|
SLO
|
slow
|
GEN
|
|
SLOM
|
simultaneous compass
locator at outer marker
|
GEN
|
|
SLP
|
sea level
pressure
|
METAR
|
|
SLP
|
slope
|
GEN
|
|
SLP
|
speed
limiting point
|
ICAO
|
|
SLR
|
slush on
runway |
NWS
|
|
SLRAP
|
standard
low frequency range
approach
|
GEN
|
|
SLS
|
side lobe
suppression
|
GEN
|
|
SLT
|
sleet
|
NWS
|
|
SLW
|
slow
|
ICAO
|
|
SM
|
statute
mile |
GEN
|
|
SMC
|
squawk
mode code
|
GEN
|
|
SMC
|
surface
movement control
|
ICAO
|
|
SML
|
small
|
GEN
|
|
SMR
|
statute
mile radius
|
GEN
|
|
SMR
|
surface
movement radar
|
ICAO
|
|
SMRY
|
summary
|
GEN
|
|
SMS
|
synchronous meteorological
satellite
|
GEN
|
|
SMS
|
systems
maintenance sector
|
GEN
|
|
SMT
|
submit
|
GEN
|
|
SMTH
|
smooth
|
NWS
|
|
SMTM
|
sometime
|
GEN
|
|
SMWHT
|
somewhat
|
GEN
|
|
SN
|
snow
|
ICAO
|
|
SN
|
strategic
navigation
|
GEN
|
|
SN
|
systems
navigation
|
GEN
|
|
SNBNK
|
snowbank
|
NWS
|
|
SND
|
sand or
sanded or sanding
|
GEN
|
|
SNFLK
|
snowflake
|
NWS
|
|
SNGL
|
single
|
GEN
|
|
SNOINCR
|
snow depth
increase in past hour
|
NWS
|
|
SNOWTAM |
NOTAM
reporting the presence or
removal of hazardous
conditions due to snow,
ice, slush or standing
water associated with
snow, slush or ice on the
movement area
|
ICAO
|
|
SNSH
|
snow
showers
|
ICAO
|
|
SNW
|
snow
|
NWS
|
|
SNWFL
|
snowfall
|
NWS
|
|
SOAP
|
spectrometric oil analysis
program
|
ATC
|
|
SOB
|
souls on
board |
ATC
|
|
SOCC
|
NORAD
Sector Operations Control
Center |
GEN
|
|
SOMSG
|
see our
message
|
GEN
|
|
SOP
|
standard
operating procedure
|
GEN
|
|
SORAP
|
standard
omni range approach
|
GEN
|
|
SP
|
standard
holding pattern
|
GEN
|
|
SP
|
station
pressure
|
NWS
|
|
SPAN
|
stored
program for alpha numerics
|
GEN
|
|
SPB
|
seaplane
base |
GEN
|
|
SPCLY
|
especially
|
GEN
|
|
SPD
|
speed
|
GEN
|
|
SPEC
|
specification
|
GEN
|
|
SPECI
|
aviation
selected special weather
report |
METAR
|
|
SPKL
|
sprinkle
|
NWS
|
|
SPL
|
special
|
GEN
|
|
SPL
|
supplementary flight plan
|
ICAO
|
|
SPLNS
|
south
plains |
NWS
|
|
SPO
|
strategic
plan of operation
|
ATC
|
|
SPOT
|
spot wind
|
ICAO
|
|
SPRD
|
spread
|
NWS
|
|
SPRL
|
spiral
|
GEN
|
|
SPS
|
Standard
Positioning Service
|
ATC
|
|
SPT
|
strategic
planning team
|
ATC
|
|
SQ
|
squall
|
METAR
|
|
SQDN
|
squadron
|
GEN
|
|
SQK
|
squawk
|
ATC
|
|
SQLN
|
squall
line |
NWS
|
|
SR
|
standard
range approach
|
GEN
|
|
SR
|
sunrise
|
GEN
|
|
SRA
|
surveillance radar
approach
|
ICAO
|
|
SRCH
|
search
|
GEN
|
|
SRE
|
surveillance radar element
of precision approach
radar system
|
ICAO
|
|
SRG
|
short
range |
ICAO
|
|
SRND
|
surround
|
GEN
|
|
SRPN
|
special
requisition priority
number |
GEN
|
|
SRR
|
search and
rescue region
|
ICAO
|
|
SRY
|
secondary
|
ICAO
|
|
SS
|
sandstorm
|
METAR
|
|
SS
|
sunset
|
GEN
|
|
SSALF
|
simplified
short approach lighting
system with sequenced
flashers
|
GEN
|
|
SSALR
|
simplified
short approach lighting
system with runway
alignment indicator lights
|
GEN
|
|
SSALS
|
simplified
short approach lighting
system |
GEN
|
|
SSB
|
single
sideband
|
ICAO
|
|
SSE
|
southsouth east
|
ICAO
|
|
SSERN
|
southsoutheastern
(weather reports only)
|
NWS
|
|
SSEWD
|
southsoutheastward
(weather reports only)
|
NWS
|
|
SSNO
|
request no
SIDs or STARs
|
ATC
|
|
SSR
|
secondary
surveillance radar
|
GEN
|
|
SST
|
supersonic
transport
|
ICAO
|
|
SSW
|
southsouth west
|
ICAO
|
|
SSWRN
|
southsouthwestern
(weather reports only)
|
NWS
|
|
SSWWD
|
southsouthwestward
(weather reports only)
|
NWS
|
|
ST
|
saint
|
GEN
|
|
ST
|
stratus
|
NWS
|
|
STA
|
straight
in approach
|
ICAO
|
|
STADMR
|
station
administrator
|
GEN
|
|
STAGN
|
stagnation
|
NWS
|
|
STALO
|
stabilized
local oscillator
|
GEN
|
|
STAR
|
standard
terminal arrival
|
GEN
|
|
STATE
|
military,
customs, or police
services
|
ICAO
|
|
STBL
|
stable
|
GEN
|
|
STCLB
|
start
climb |
ATC
|
|
STD
|
standard
|
GEN
|
|
STDST
|
start
descent
|
ATC
|
|
STDY
|
steady
|
GEN
|
|
STF
|
stratiform
|
ICAO
|
|
STFRA
|
stratus
fractus
|
NWS
|
|
STFRM
|
stratiform
|
NWS
|
|
STG
|
strong
|
NWS
|
|
STLT
|
satellite
|
GEN
|
|
STM
|
storm
|
NWS
|
|
STMGR
|
station
manager
|
GEN
|
|
STMP
|
special
traffic management program
|
ATC
|
|
STN
|
station
|
GEN
|
|
STNR
|
stationary
|
ICAO
|
|
STNRY
|
stationary
|
NWS
|
|
STOL
|
short
takeoff and landing
|
GEN
|
|
STR
|
subject
terminal control release
|
ATC
|
|
STRO
|
stereo
routes |
GEN
|
|
STS
|
status
|
ICAO
|
|
STWL
|
stopway
light |
ICAO
|
|
STWY
|
stopway
|
GEN
|
|
SUA
|
special
use airspace
|
GEN
|
|
SUB
|
substitute
|
GEN
|
|
SUBFIX
|
subject to
correction
|
GEN
|
|
SUBJ
|
subject to
|
ICAO
|
|
SUF
|
sufficient
|
GEN
|
|
SUG
|
suggest
|
GEN
|
|
SUP
|
supply
|
GEN
|
|
SUPCHG
|
supercharge
|
GEN
|
|
SUPPL
|
supplement
|
GEN
|
|
SUPPS
|
regional
supplementary procedures
|
ICAO
|
|
SUPR
|
superior
|
GEN
|
|
SUPSD
|
supersede
|
GEN
|
|
SUPT
|
superintendent
|
GEN
|
|
SUPVR
|
supervisor
|
GEN
|
|
SURPIC
|
surface
picture
|
ATC
|
|
SUSP
|
suspend
|
GEN
|
|
SVC
|
service
|
GEN
|
|
SVCBL
|
serviceable
|
ICAO
|
|
SVFR
|
special
VFR |
GEN
|
|
SVG
|
serving
|
GEN
|
|
SVN
|
space
vehicle number
|
GEN
|
|
SVR
|
severe
|
GEN
|
|
SVRL
|
several
|
GEN
|
|
SW
|
southwest
|
ICAO
|
|
SWAP
|
severe
weather avoidance plan
|
GEN
|
|
SWB
|
scheduled
weather broadcast
|
GEN
|
|
SWB
|
southwestbound
|
ICAO
|
|
SWLG
|
swelling
|
NWS
|
|
SWLY
|
southwesterly (weather
reports only)
|
NWS
|
|
SWRN
|
southwestern (weather
reports only)
|
NWS
|
|
SWSL
|
supplemental weather
service location
|
ATC
|
|
SWY
|
stopway
|
ICAO
|
|
SX
|
stability
index |
NWS
|
|
SXN
|
section
|
NWS
|
|
SYD
|
release
subject your discretion
|
GEN
|
|
SYNOP
|
synoptic
|
NWS
|
|
SYNS
|
synopsis
|
NWS
|
|
SYS
|
see your
service
|
GEN
|
|
SYS
|
system
|
GEN
|
