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CAGE
2 Civil Air Guard (UK, 1937–39).
3 Circulation aérienne générale (F).
CAGE 1 Commercial and governmental entity.
2 Commercial avionics GPS engine.
3 Combined arms gateway environment.
cage 1 To orientate and lock gyro into fixed position
relative to its case.
2 Housing for bearing balls/rollers/needles.
caged switch Protected against inadvertent operation by
spring-loaded hinged box.
CAGR Compound average, or annual, growth rate.
CAGS Central attention-getting system.
CAH Cabin-attendant handset.
CAHC The Canadian Aviation Heritage Centre
[McGill university Macdonald Campus, Montreal H9X
3V9].
CdHgTe Cadmium mercury telluride.
CAHI Central Aerodynamics and Hydrodynamics
Institute (Moscow, founded 1 December 1918).
CAHS Canadian Aviation Historical Society.
CAI 1 Civil Aeromedical Institute (FAA).
2 Computer-aided instruction (see CMI).
3 Close approach indicator (STOVL carrier landing).
4 Czech Astronomical Institute.
5 Caution annunciator/indicator.
6 Component analysis and integration.
7 Composites affordability initiative (USAF).
CAIG Cost analysis improvement group (DoD).
CAIMS Central aircraft information management, or
maintenance, system.
Cains Carrier aircraft (since 1982, also aligned) inertial
navigation system.
CAIP Civil aircraft inspection procedure[s].
CAIR Confidential aviation incident reporting [P adds
programme].
Cair System for humidifying First and Business on longhaul
(CTT).
CAIRA See IAARC.
CAIS 1 Common Ada [or APSE] interface set.
2 Common airborne instrument, or instrumentation,
system.
CAIV Cost as an independent variable [each decision
taken on basis f (cost of program)].
cAk Continental Arctic air mass, very cold.
cal Calorie.
CALCM Conventional [i.e., not nuclear] air-launched
cruise missile.
calculated altitude Celestial altitude calculated but not
observed.
Calda Canadian Airline Dispatchers Association
[Milton, ON].
Calea Canadian Airline Employees Association [Mississauga,
ON].
Cale gear Shock-absorbing system in carrier arrester
wire anchors.
CALF, calf Common affordable lightweight fighter.
Calfab Computer-aided layout and fabrication.
Calfax Patented quick-release panel fastener, latch
opened or closed by 540° rotation.
calf-garters Automatic leg-restraint straps in certain
ejection seats.
caliber US unit of length, = 10 –2 in.
calibrated airspeed IAS corrected for ASI system errors;
‘true indicated airspeed’, but see airspeed.
Calorizing
calibrated altitude Not normally used, but signifies
pressure altitude or radar height corrected for instrument
errors.
calibrated club propeller Club propeller whose drive
torque has been measured and plotted against rpm; thus,
can serve as dynamometer.
calibrated focal length Equivalent focal length adjusted
to equalise positive and negative distortion over view
field.
calibration card Graphical or tabular plot of instrument
errors (other than compass); usually displayed near
instrument.
calibration test Static run of bipropellant rocket engine
to check propellant mixture ratio and performance.
calibrator Device for measuring instrument errors.
calibre Bore (ID) of tube, esp. diameter of largest
cylinder that fits inside (thus, in rifled barrel, touches
highest points of opposing lands).
caliper Instrument for measuring or checking thickness,
diameter or gap; with internal or external measuring
points on tips of pivoted or sliding arms.
calipher Caliper.
Calipso Cloud aerosol lidar and IR pathfinder satellite
observation[s].
Callback Confidential reporting system to attempt to
record civil (especially air carrier) incidents caused by
human failures (FAA via NASA).
call fire Fire against specific target delivered as
requested.
call for fire Request, by FAC or other observer, for fire
on specific target and containing target data.
calling See next.
calling out Spoken data readout by crew member or
ground observer to assist pilot or other crew member;
thus, co-pilot’s speed/altitude checks on instrument
approach.
call mission CAS (3) mission at short notice by prebriefed
pilot with pre-armed aircraft, target assigned after
take-off.
call number 1 In EDP, number code identifying subroutine
and containing data relevant to it.
2 Aircraft serial number, its identity on radio [general
usage] (US).
callout notes On engineering drawing, written notification
of special features (eg material, process, tolerance or
equipment installation).
Calls Computer-aided language learning system.
callsign, call sign Pronounceable word(s), sometimes
with suffix number, serving to identify a communications
station (such as an aircraft). Civil aircraft ** are ICAO
phonetic letters and numbers derived from international
registration; ground station ** are name of airport
followed by type of station (tower, departure, clearance
delivery, etc).
calm No sensible wind.
CALNS, Calns Common air-launched navigation
system.
calorie Unit of quantity of heat, contrary to SI;
International *, cal IT = 4.1868 J by definition, 15°. * =
4.1855 J, thermochemical * = 4.184 J.
calorific value Quantity of heat released by burning unit
mass of fuel; kJ/kg = 0.429923 Btu/lb; kJ/m 3 = 0.200784
Btu/Imp. gal.
Calorizing Heating steel part surrounded by aluminium
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