|
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
|
|
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
|
GEN
|
|
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
|