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standby item
3 Able to board flight if seat available.
standby item One duplicating another in function and
used following failure of that normally operative.
standby lane In a flight-control system, this remains
“switched on” throughout flight, ready to take over
instantly should a command lane fail.
standby mode One of several basic operating modes for
equipment, eg radar, normally characterized by receivers
shut down but transmitters warmed and ready for immediate
power, or DME powered up but not
transmitting.
standby pilot Not defined, but often used to describe
second pilot 2.
standby redundancy System design such that redundant
duplicative channels do not normally operate (as in
parallel) but are switched on following failure of those
normally operative.
stand-down 1 Particular aircraft, though serviceable,
remains for long period on ground, for whatever reason.
2 Base or unit is deactivated.
stand fix Most accurate of all fixes, obtained with
aircraft parked on surveyed location.
standing detachment Semi-permanent deployment
(RAF).
Standing Group The permanent body of NATO.
standing patrol Patrol.
standing water Defined as mean depth exceeding
12.7 mm (0.5 in).
standing wave 1 Oscillatory motion in vertical plane of
air downwind of steep hill or mountain face in which
troughs and peaks (latter usually marked by cloud at
various levels) remain roughly stationary; at lowest level
cloud often rotor, high levels usually lenticular. Strong **
often associated with jetstream.
2 Stationary wave formed in transmission line by superposition
of travelling wave reflected back from point of
impedance-change of forward wave.
3 Stationary wave or wave-pattern formed in vibrating
body, eg turbine disc, by reflection.
standing wire That length of cable consumed in making
splice.
stand-off 1 Distance from target surface to reference
point on hollow-charge warhead (usually apex of cone).
2 To remain outside airfield circuit or pattern, normally
following command or positive decision to do so, eg
following landing-gear failure or obstruction on runway.
3 To have to park too far from terminal to use
airbridges.
4 To remain outside effective range of enemy defences,
esp. when making an attack with * missile.
stand-off ability Capability of forcing, eg by outgunning,
similar enemy vehicles to remain beyond their
own firing range.
stand-off armour Armour fixed on outside of existing
armour with sufficient spacing to protect against hollowcharge
piercing weapons. Unlike spaced armour,
normally only two layers in all.
stand-off bomb ASM (1) launched beyond enemy
defence perimeter. Odd UK term of 1950s usually
synonymous with cruise missile.
stand-off flare 1 IRCM payload dispensed at sufficient
distance to protect against enemy heat-homing missiles.
2 Rarely, illuminating flare dropped on parachute
staring focal-plane array
beside rather than over surface target, usually in helicopter
ASV attack.
stand-off missile One which may be launched at a
distance (from target) sufficient to allow attacking
personnel to evade defensive fire from target area
(USAF).
stand-off steps Passenger/crew stairways kept at
terminal equipped with loading bridges at gates to cater
for overflow traffic that has to stand-off (3).
stand up To become operational at commissioning
ceremony of new squadron or other unit (US).
Staneval Standards, or standardization, evaluation.
stang fairing Fairing on sides of jet engine installation,
especially pod, covering reverser bucket hinges and rams.
Stanly Statistics and analysis, of ATC data.
Stano Surveillance, target acquisition and night observation;
C adds counter-intelligence center.
Stansit Statistics on non-scheduled air transport
(ECAC).
Stanton number Non-dimensional number defining heat
transfer through surface; St = -q/ρ VC p dT where q is total
quantity of heat, ρ is density of fluid (eg air), V is relative
velocity, C p is specific heat at constant pressure and dT is
recovery temperature minus wall temperature.
Stanyl Trade name (DSM) for aliphatic polyamide
nylon-type fluoropolymers.
STAP 1 Statistics panel (ICAO).
2 Space/time adaptive processor, or processing.
STAPL Ship-tethered aerial platform (Kaman).
STAR, Star 1 Standard terminal arrival [some authorities
prefer approach] route[s].
2 Ship tactical airborne RPV.
3 Surface-to-air recovery (or, USAF, retrieval[s]).
4 Satellite de télécommunications, d’applications et de
recherche (F) [see Star (2)].
5 Space thermionic advanced reactor.
6 Strategic and tactical airbone reconnaissance
(Thomson-CSF), or recovery.
7 Star tracking using ambient radio.
8 Supersonic tailless-aircraft research.
9 System-threat assessment report.
10 Subsonic-transport acoustic research.
11 Studies, tests and applied research (Eurocontrol).
12 Strategic-arms reduction.
13 Signal threat analysis and recording.
14 Simulation trainer for ATC and radar.
15 Surveillance and threat-alert radar.
16 Structural augmentation roadmap.
Star 1 Starboard.
2 Satellite for telecom, applications and research.
star 1 Star-shaped empty space along centre of solid
rocket propellant grain.
2 Formation formed all on same level by wrist-linked
team of free-fall parachutists.
3 Helicopter main-rotor control radial arms, located
under hub; one fixed, one rotating.
Staran Association processor in ARTS-II (FAR).
starboard Naval-derived term for right, right-hand or
towards right, seen from behind. Thus, from front, * is on
left.
STAR-C STAR (5)-compact.
star-centred Cast or extruded with star (1).
stardust Air-impingement haze in acrylic finish.
staring focal-plane array Important class of sensors
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