navigation acronyms, abbreviations and definitions - International ...

TN true north (northerly direction of the meridian)
TNAB Telecomms & Navigation Advisory Board
TNSE total navigation system error
TOA time of arrival
In cellphone location could give accuracy of 125 m.
TOC time of coincidence (eg LORAN-C timing)
TOC time of computation
TOC top of climb
TOCI time of coincidence interval (eg LORAN-C timing)
TOD time of day
TOD top of descent
TOE time of emission
TOGA take-off and go-around (mode of autopilot)
TOID Topographic Identifier (polygon features in OS MasterMap)
Unique 16-digit reference for data above and below ground.
TOPS Total Operations Processing System (for train movements)
TORA take off run available
TORMES System for visually impared in cities (uses EGNOS & SISNeT)(Spain)
TORT Generic legal term relating to breach of duty and liability.
TOT time of transmission
TOTS Tanker Officers Training Standards (marine)
TOW time-of-week
Least 19 significant bits of GPS Z-Count giving time through the week
in 1.5-second units. Truncated version in 6-second epochs included in
navigation message HOW.
TP Thematic Priority (EU FP6)
TPA taxi position awareness (for aircraft)
TPA technical partner agreement
TPAS Traffic Proximity Alert System (air)
TPAT (C-TPAT) Trade Partnership Against Terrorism (US)
TPEG Traffic Protocol Experts Group
A protocol for relaying traffic information. Used by DAB for invehicle
systems.
TPO tree preservation order
TPS transmission parameter signalling
TPWS Train Protection and Warning System
TQM total quality management
TRA temporary restricted area (ATC)
Trackstar System for tracking stolen vehicles (RAC)
TRACON Terminal Radar Approach Control
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