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CTLA
4 Coal to liquid.
CTLA Control area.
CTLZ Control zone.
CTM 1 Capacity ton-miles (unless otherwise stated,
short tons, statute miles).
2 Centrifugal twisting moment.
3 Cost per ton-mile.
CTMO Central[ized] air-traffic flow management
organization.
CTN 1 Caution.
2 Case, throat, nozzle.
CTO 1 Chief technical officer.
2 Conventional takeoff.
3 Crypto operator.
CTOC Common tactical operations centre (GBAD).
CTOL Conventional takeoff and landing, ie ordinary
aeroplane.
CTOT 1 Calculated takeoff time.
2 Constant torque on takeoff.
CTP 1 Chief test pilot.
2 Command track pointer.
3 Common technology programme (ASTOVL).
4 Critical technology project[s].
CTPA Comité Technique de Programmes d’Armement
(F).
CTPB Carboxy-terminated polybutadiene rocket
propellant.
CTR 1 Controlled airspace, control zone [see CTZ].
2 Controllable-twist rotor.
3 Common Type Rating.
4 Co-operative Threat Reduction (US, R).
5 Click to refresh.
6 Continuous technology refreshment.
7 Common, or configuration, test requirements; D
adds document.
8 Civil tilt-rotor.
9 Center, centre.
10 Conversion to role; T adds training.
CTRD Configuration test requirements document.
CTRDAC Civil tilt-rotor development advisory
committee.
CTRL Control.
CTS 1 Central tactical system.
2 Cockpit television sensor.
3 Common termination system.
4 Clear to send.
5 Contractor transition support (USAF).
6 Communications technology satellite.
C T /S, or C T /σ Helicopter blade-loading coefficient.
CTSS Commercial training simulator, or simulation,
services (USAF).
CTT 1 Capital-transfer tax (UK).
2 Commander’s tactical terminal; H/R adds hybridreceive
only.
3 Controlled-torque tightening.
4 Conversion to type; T adds training.
5 Combined Test Team (Int.).
6 Council for Travel and Tourism, [office London]
(UK).
CTTO Central Tactics & Trials Organization (RAF).
CTTTF, CT 3 F Combating Terrorism Technology Task
Force (DoD).
CTU 1 Control terminal unit.
CUP
2 Cabin telecommunications, or telephone, unit
(satcom).
CTV 1 Curved trend vector.
2 Crew transfer vehicle.
CTVS Cockpit TV sensor [or system].
CTWADN Council of Third World Aerospace &
Defence Newspapers [Karachi, Pakistan].
C2PC Command and control personal computer.
CTZ 1 Control zone [this is preferred].
2 Corps tactical zone.
CU 1 Conversion unit.
2 Cage/uncage; gyro system control.
3 Common use[r]: BES adds baggage enterprise system
[cubes], PS passenger self-service, SS self-service and TE
[cute] terminal equipment.
4 Control unit (HMS).
5 Combiner unit (HUD).
6 Channel utilization.
Cu Cumulus.
CUAV Clandestine UAV.
cubage Total volume of rectilinear cargo that can be
accommodated; typically 0.7 of pressurized above-floor
cargo volume.
Cuban eight Manoeuvre in vertical plane normally
comprising ¾ loop, half-roll, ¾ loop, half-roll.
cube out To run out of payload volume (either pax,
cargo or both) at less than MSP (5).
cubic foot Non-SI measure of volume, 1* = 28,316.7 cm 3 ,
= 0.0283167 m 3 ; reciprocals, 3.53 x 10 -5 , 35.3148.
cubic inch Non SI measure of volume, 1 cu in = 16.387
cm 3 = 0.0164 litre; reciprocals 0.06102, 60.9756.
c/uc Cage/uncage.
CUDS Common-user data services.
CUE Computer update equipment.
cue 1 Glimpse of Earth’s surface through cloud or darkness
giving helpful attitude and distance information.
2 To slave homing seeker of missile to target, using
information from other source.
CuF Cumuliform cloud.
cuff 1 Secondary structure added around propeller
blade root, usually for aerodynamic reasons.
2 Structure added ahead of wing LE extending chord
3–5%, with sharp inboard end.
3 Heated muff round drain valve or drain mast.
Cufos J. Allen Hyneck Center for UFO Studies
[Chicago, Illinois 60659] (US).
CuFra Cumulus fractus.
CUG Computer Utilization Group (OECD).
CUGF Counter underground facilities [weapons
against caves].
CUGR Cargo utility GPS receiver.
CUI Committee on Unlawful Interference.
cu in Cubic inch, 16.387 cm 3 .
culture Man-made terrestrial features.
cumulonimbus Cb, extremely large cumuliform clouds
whose tops reach stratosphere and spread in form of
fibrous ice-crystal anvil. Extreme vertical velocities and
turbulence make them dangerous.
cumulus Cu, dense white clouds with almost horizontal
base and large vertical development, domeshaped tops
(cauliflower) showing growth in strong upcurrents.
cumulus mammatus Cumuliform clouds having pendulous
protuberances on underside.
CUP 1 Capabilities upkeep program (USN).
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