S
- S
- S/N
- SA (1)
- SA (2)
- SA (3)
- SAA
- SAAAR
- SAAQ
- SAAR
- SAARC
- SAC
- SADC
- SADCC
- SAE
- SAF (1)
- SAF (2)
- SAFA
- safety and air navigation oversight audit section
- safety assessment of foreign aircraft
- safety assurance
- safety data collection and processing systems
- safety management manual
- safety management panel
- safety management system
- safety performance indicator
- safety recommendations of global concern
- SAIB
- SALS (1)
- SALS (2)
- SAMS
- sand
- sandstorm
- SAR
- SARCC
- SARPS
- SART
- SAS
- SAT (1)
- SAT (2)
- SATCC
- SATCOM
- satellite-based augmentation systems
- satellite-based landing system
- SATNAV
- SATS
- SB
- SBAS
- SBSTA
- SC
- scattered
- SCBA
- SCF-NP
- SCF-PP
- SCT
- SD (1)
- SD (2)
- SDCPS
- SDF (1)
- SDF (2)
- SDR (1)
- SDR (2)
- sea level pressure
- search and rescue
- search and rescue (radar) transponder
- search and rescue mission co-ordinator
- search and rescue region
- search and rescue unit
- SEAT
- SEC
- second-in-command
- secondary surveillance radar
- security management system
- security related
- security tamper-evident bags
- segmento de aproximação inicial
- segmento de aproximação inicial [POR]
- SEL
- SELA
- SELCAL
- selective calling
- selective identification feature
- self-contained breathing apparatus
- SeMS
- sensitive security information
- SER
- serial number
- series return deadline
- service bulletin
- service difficulty report
- service weight adjustment
- serviço de investigação e prevenção de acidentes aeronauticos (brazil)
- severe weather threat index
- SFRJ
- SH (1)
- SH (2)
- shaft horsepower
- shallow
- shallow fog
- SHEEL
- SHEL
- SHF
- SHM
- short
- short-term memory
- short approach light system
- short take-off and landing
- short takeoff/vertical landing
- shower
- shower(s) in the vicinity
- SHP
- shutdown
- SIAP
- SIC
- SID
- SIECA
- sierra
- SIF
- SIGMET
- significant safety concern
- significant weather
- signs and symptons, allergies, medications, past medical history,
- SIGWX
- SIL
- simple approach lighting system
- simple harmonic movement
- simple triage and rapid treatment
- simplified short approach lighting system with runway alignment indicator lights
- simplified technical english
- simulation of upset recovery in aviation
- single-pilot operation
- single annular combustor
- single antenna flag
- single engine air tanker
- single isolated wheel load
- single rotor test
- single sideband
- SIP
- SIPAER
- SIS
- situational awareness
- SIWL
- SKC
- sky clear
- SLP (1)
- SLP (2)
- SLS
- SLSA
- SM
- SMA
- small airfield for tactical support
- small hail
- SMC
- SMC (1)
- SMC (2)
- SME
- SMGCS
- SMM
- smoke number
- SMP
- SMR
- SMS
- SN
- SN (2)
- snow
- snow grain
- SNOWTAM
- SOC
- société internationale de télécommunications aéronautiques
- society of automotive engineers
- sociologcal impact statement
- SODAR
- software, hardware, environment and liveware
- software, hardware, environment, liveware, liveware
- SOIA
- SOLI
- solid-fuel ramjet
- somente em aeronave cargueira
- sonic detection and ranging
- SOP
- SOPs
- SOR
- sound exposure level
- sound transmission coefficient
- south asian association for regional cooperation
- south pacific bureau for economic cooperation
- south pacific commission
- southern africa transport and communications commission
- southern african development community
- southern african development cordination conference
- southern cone common market
- SP
- SPA
- space meteorology
- space weather center
- SPC
- SPEC
- SPECI
- special activity airspace
- special condition for eVTOL aircraft
- special drawing rights
- special position indicator
- special prorate agreement
- speed limiting point
- speed trim system
- SPI (1)
- SPI (2)
- SPL
- SPO (1)
- SPO (2)
- SQ
- squall
- SRA
- SRD
- SRE
- SRGC
- SRM (1)
- SRM (2)
- SRR
- SRT
- SRU
- SS
- SSALR
- SSALS
- SSALSR
- SSB
- SSC
- SSI
- SSID
- SSIM
- SSO
- SSP
- SSR
- SST
- SSV
- ST
- STA
- STAB
- STAB at landing
- STAB at take-off
- stabilization augmentation system
- stabilizer trim setting
- STABLA
- STABTO
- standard deviation
- standard instrument arrival
- standard instrument arrival routes
- standard instrument departure
- standard operating procedures
- standard operational procedures
- standard schedules information manual
- standardized training package
- standardized training package library
- standards and procedures officer
- standards and recommended practices
- STAR
- STAR (1)
- STAR (2)
- start-of-roll
- start of climb
- state aviation activity questionnaire
- state of licence issue
- state safety oversight
- state safety programme
- STC (2)
- STE
- steady initial climb speed
- STEBs
- step climb
- step down fix
- STEPCLB
- STM
- STMP
- STOL
- stopway
- stopway light(s)
- STOVL
- STP
- STPL
- straight-in approach
- stratocumulus
- structural integrity programme
- structural repair manual
- STS
- STWL
- SUA
- SUA/ISE
- subject matter expert
- substantial damage
- SUP
- super high frequency
- supersonic transport
- supplemental structural inspection document
- supplementary flight plan
- SUPPS
- SUPRA
- surface movement control
- surface movement radar
- surveillance integrity level
- surveillance radar approach
- surveillance radar element of precision approach radar system
- suspected unapproved parts
- sustainable aviation fuel
- SVFR
- SVS
- SWA
- SWAP
- SWEAT
- SWX
- SWXC
- SWY
- synthetic vision system
- system component failure-power plant
- system/component failure or malfunction (non-powerplant)
- systems approach to training