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SDFOV
6 Special Duties Flight [unit] (RAF).
SDFOV Simultaneous dual field of view.
SDG Speed-decreasing gearbox.
SDI 1 Strategic (sometimes rendered as Space) Defense
Initiative (US); O adds Organization, P Program, PO
Participation Office.
2 System discharge indicator.
3 Selective dissemination of information (telecommunications).
4 Source destination identifier.
5 Strength deployment inventory.
S-D&IF System development and integration facilities.
SDIO SDI Organization, or Office (US).
SDIP SDI Program.
SDIPO SDIP Office (UK).
SDIS Small-diameter imaging seeker.
SDL Software design laboratory.
SDLC Synchronous datalink controller.
SDLF Shaft-driven lift fan.
SDLM Standard depot-level maintenance.
SDL-PE Software design laboratory – protocol
emulator.
SDLV Shuttle-derivation launch vehicle.
SDM 1 Scatter-drop mine (or munition); helicopter
weapon.
2 Site-defense of Minuteman; anti-intruder system.
3 System definition manual.
4 Speaker drive module.
5 Ship-defense missile.
6 Sum in depth of modulation.
7 Space division multiplex[ing].
8 Structural dynamics model.
9 Security duty manager [airport].
10 Service data management.
SDMA Space-division multiple-access.
SDME Software development and maintenance
environment.
SDMI Strategic distribution management initiative
(USTC/DLA).
SDMS 1 Software development maintenance system.
2 Shipboard data-multiplex system.
3 Support defense missile system.
4 Sensor to decision-maker to shooter.
SDN System descriptive note.
Sdn Bhd Sendirian Berhad (company constitution,
Malaysia).
SDNRIU Secure digital net radio interface unit.
SDO 1 Serial digital output.
2 Standards Development Organization (SAE).
SDOF Single degree of freedom.
SDOM Six degrees of motion (simulator).
SDP 1 System-definition phase.
2 Signal-data processor.
3 Standard datum plane.
4 Surveillance data processing.
SDPDS Surveillance data-processing and distribution
system[s].
SDPR Federal directorate of supply and procurement
(Jugoslavia).
SDPU Sensor-data processor unit.
SDR 1 System design report, or review, or responsibility.
2 Service difficulty report, or reporting.
3 Signal data recorder.
4 Special drawing rights; assist airlines in inter-line fare
transactions.
5 System development requirement.
6 Strategic Defence Review (UK).
7 Supplier data requirements [L adds list].
8 Software-defined radio.
9 Signal-to-distortion ratio.
SDRAM Synchronous dynamic RAM.
SDRL Subcontract, or supplier, data requirements list.
SDRS Splash-detection radar system.
SDS 1 Software development system.
2 Satellite, or secondary, data system.
3 Strategic defense system (US, SDI).
4 Small digital switch.
5 Short-distance sensor.
SD-S Situation display, secondary.
SDSAWG Software Development Standards and Ada
Working Group.
SDSMS Self-defense surface missile system.
SDT 1 System development tool.
2 Shock/detonation transition.
SDTI Système de drones tactiques intérimaire (F).
SDU 1 Selective decode unit (SSR).
2 Safety data unit (CAA).
3 System design utility.
4 Satellite, or satcom, or Service, data unit.
5 Smart, or sensor, display unit.
6 Signal [ATC] distribution unit.
7 Secure-data unit (JTIDS).
SDVP System demonstration validation program(me).
SDW Symmetrical double-wedge aerofoil.
SE 1 Support equipment.
2 Systems, or safety, or sustaining, engineering.
3 Servicing echelon.
4 Snow ended.
5 Storage element.
6 Synthetic environment.
7 Synthetic[ally] enhanced.
8 Strip examination.
S/E Single-engine[d].
Se Selenium.
SE 2 Software engineeering environment.
SEA 1 Single-engine asymmetry.
2 Stored-energy actuator.
3 Software engineering architecture.
4 South-East Asia region (ICAO).
5 Statistical energy analysis.
sea/air/land team Group trained and equipped for
unconventional and paramilitary operations including
surveillance/reconnaissance in and from restricted waters,
rivers and coastal areas (DoD).
Sea ALL Sea airborne lead line, UAVs for naval
perimeter defence (USN).
sea anchor Anchor for marine aircraft in deep water,
typically canvas or rubberized-fabric bucket or drogue
trailed from stern.
Seabed Treaty Prohibition of NW, 11 February 1971.
Seabee Construction Battalion (USN).
sea bias See water bias.
sea breeze Onshore wind during day.
SEAC 1 Support-Equipment Advisory Commitee
(inter-airline).
2 South-East Asia Command (WW2).
SEAD Suppression of enemy air defence(s).
SEAD
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