navigation acronyms, abbreviations and definitions - International ...

TAA technically advanced aircraft
GA aircraft in which the pilot ‘interfaces with one or more computers
in order to aviate, navigate or communicate’. Includes a minimum of an
IRF-rated GPS with moving map and integrated autopilot.
TAA terminal arrival area
TACAN TACtical Air Navigation
Military beaccon system giving bearing and range.
TACIS Technical Assistance to the CIS (EU)
TADS triple air data system
TAF terminal aerodrome forecast
TAI Temps Atomique International (International Atomic Time)
Determined by comparison of atomic clocks around the world. Does not
change with variations of earth rotation rate. Time unit is the SI
second, ‘the duration of 9,192,631,770 periods of the radiation
corresponding to the transition between 2 hyperfine levels of the
caesium 133 atom’. TAI = Time (Loran) + 10s = Time (GPS) + 19s = UTC
+ LS.
TAO Tropical Atmospheric Ocean project
70 buoys moored in the Tropical Pacific Ocean.
TAP-T Telematics Application Programme - Transport Sector (EU)
TARSUS Tactical Artillery Survey System (uses GPS)
TAS true airspeed
TAT total air temperature
TAWS Terrain Awareness and Warning System
TB true bearing (angular distance from TN to the object)
TBO time between overhauls
TBO trajectory-based operations
TC telecommand (of satellite)
TC terminal control (ATC)
TC Tide Committee (IHO)
TC true course (course to steer)
The intended direction of movement (of a ship), defined by the angle
between the meridian through its position and the fore-and-aft line (of
the ship), expressed in angular units from true north (000º).
TC Type Certificate (air)
TCA The Coastguard Agency (UK)
Merged with MSA in April 1998 to become MCA.
TCA time of closest approach
Time that a satellite is closest to a beacon or rx during a pass.
TCAA Transalatic Common Aviation Area
TCAR three-carrier ambiguity resolution
131
March 2012