|
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
|
|
SAT
|
Saturday
|
ICAO
|
|
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
|
|
SMGCS
|
surface movement guidance and control
system
|
GEN
|
|
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
|
|
SUN
|
Sunday
|
ICAO
|
|
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
|