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Tc
Tc 1 Tropical continental air mass.
2 PN code bit length, also called chip width.
3 Adiabatic flame temperature of rocket.
4 Superconducting critical temperature.
5 Torque concentrated at a particular location or plane
in large panel.
T/C Top of climb.
t/c Thickness/chord ratio of aerofoil; inferior suffixes
include r root, k kink and t tip.
TCA 1 Terminal control area.
2 Télécommande automatique; IR/optical + wire
guidance for missile. Operator merely keeps sight on
target.
3 Time of closest approach.
4 Track crossing angle.
5 Temperature control amplifier.
6 Technical collaboration agreement.
7 Turbine cooling airflow.
8 Technical, or technology, concept aircraft (SST).
9 Tungsten carbide alloy.
10 Traffic-collision avoidance; D adds device (for GA;
1980s).
11 Throttle-control assembly.
12 Transformational communications architecture.
13 The Canberra Association.
TCAA 1 Taiwan CAA.
2 Transatlantic Common Aviation Area.
TCAC Tactical Control and Analysis Center.
TCAIA Time-critical automatic identification and
attack.
TCAP Tricyclo-acetone peroxide [liquid explosive].
TCAR Transatlantic collaborative [or co-operative]
advanced [ or AGS1] radar.
TCAS 1 Pronounced T-cass, traffic alert and collisionavoidance
system [see entry]; -RA adds resolution
advisory.
2 Tandem clapping aerial swimmer.
TCB 1 Turret control box (helicopter).
2 Trusted computer, or computing, base.
TCBM Transcontinental ballistic missile.
TCC 1 Thermal-control coating.
2 Thrust control computer.
3 Telecommunications center(s).
4 Titanium-coated carbon.
5 Turbine-case cooling.
6 Tactical co-ordination console.
7 Tactical control center.
8 Technical co-ordinating committee.
9 Troop Carrier Command (USAAF, WW2).
10 Temporary Council committee.
11 Tip clearance control [turbine rotor].
12 Traffic coordination centre.
TCCA Transport Canada Civil Aviation [certification
authority].
TC 3 , TCCC Tower control computer complex; S adds
system.
TCCF 1 Tactical combat control facility (USAF).
2 Technical communication control facility.
TCCP Take-command control panel.
TCD 1 Time-critical data.
2 Total-contents display.
TCDD Tower-cab digital display (ATC).
TCDL Tactical common data-link.
TCDS Type Certificate data sheet.
TCS
TCDT Terminal countdown demonstration test.
TCEA Training Centre for Experimental Aerodynamics
(NATO, Brussels).
TCF Terain clearance floor.
tcf Trillion cubic feet.
TCG Troop Carrier Group (USAAF).
TCH 1 Threshold crossing height.
2 See TKP.
TCI 1 Tape-controlled inspection.
2 Time-controlled item.
TCIM Tactical communications interface modem, or
module.
TCIR Toxic-chemical inventory release.
TCJ Tactical communications jamming.
TCL 1 Taxiway centreline light[s].
2 Transient control logic.
TCLT Tentative calculated landing time.
TCM 1 Trim-control module.
2 Trellis coded modulation.
3 Throttle clutch motor.
4 Trajectory-correction, or change, manoeuvre.
5 Technical co-ordination meeting.
6 Transformational communications milsatcom, or
military [also called TCS, TSAT].
TCMA Time co-ordinated multiple access.
TCML Target co-ordinate map locator.
TCMS Test-content management system.
TCN Tacan.
TCO 1 Total cost of ownership.
2 Tape-controlled oscillator.
3 Tactical Control Officer.
4 Tone cut-off (noise reduction).
TComSS Telephonics communications management
system.
TCP 1 Transfer-of-control point.
2 Transmission control program, or protocol
(Autodin).
3 Tri-cresyl phosphate.
4 Thrust centre position (of gross thrust vector).
5 Takeoff-chart computation program.
6 Traffic, or transport, control protocol; IP adds
Internet protocol.
TCPA Time to closest point of approach.
TCPED Tasking, collection, processing, exploitation
and dissemination.
TCP/IP TCP (2) internet protocol.
TCQ Throttle control quadrant.
TCR 1 Terrain-closure rate.
2 Thickness/chord ratio; usually t/c.
3 Time-compliance requirements.
TCS 1 Tilt-control switch (tilt-wing V/STOL).
2 TV camera set (F-14).
3 Tracking and communications subsystem (ACMI).
4 Telemetry and command system (satcom).
5 Turbulence-control structure.
6 Tactical-control system, or squadron.
7 Trusted computer system, meeting requirements for
secure access.
8 Tactical-command system.
9 Touch-control steering.
10 Target control set.
11 Total-component support.
12 Troop Carrier Squadron (USAAF).
13 Traffic charging system (BAA).
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