Table 5.23 -- EDCS Classifications whose label begins with T
| Label | Definition | Related concepts | Code |
| TAXIWAY | A prepared surface providing access to/from runways and the aircraft parking, terminal, service, or similar aircraft support operations. | EC AIRFIELD, EC AIRPORT, EC RUNWAY | 874 |
| TELECOM_SWITCHING_STATION | A structure housing a local system of switches that establishes connections between individual telecommunication devices, e.g., telephones. | EC MAIN_TELECOM_EXCHANGE | 875 |
| TELEFERIC | A construction of cables strung between elevated supports on which carrier units (e.g., cars or buckets intended to transport people, materiel, or equipment) are suspended; sometimes referred to as an aerial cableway or aerial tramway. | EC AERIAL_CABLE | 876 |
| TELESCOPE | An apparatus used for observing distant objects or phenomena. | 877 | |
| TENNIS_COURTS | A site and associated structures used for the sport of tennis. | 878 | |
| TENT_DWELLING | A site covered by one or more portable fabric shelters. | 879 | |
| TERRAIN | The ground surface, which may or may not be covered by water. | 880 | |
| TERRAIN_CRATER | A localized depression surrounded by higher ground, resulting from an explosion or the impact of a large or high-velocity projectile upon the terrain. | 881 | |
| TERRAIN_CUT | An excavation of the terrain surface. | EC ENGINEER_DITCH, EC MILITARY_TRENCH, EC TERRAIN_FILL | 882 |
| TERRAIN_DEPRESSION | A relatively low tract of land that is surrounded by higher ground. | 883 | |
| TERRAIN_ELEVATION | An elevation characteristic of the terrain, with respect to a defined vertical datum. | EC TERRAIN | 884 |
| TERRAIN_FILL | A site of fill that augments the terrain surface. | EC TERRAIN_CUT | 885 |
| TERRAIN_PIT | An excavation where gravel, sand, or clay are removed for use elsewhere. | EC QUARRY | 886 |
| TERRAIN_SURFACE_OBJECT | An object located on the terrain surface, e.g., a man-made structure. | EC TERRAIN_SURFACE_REGION | 887 |
| TERRAIN_SURFACE_REGION | A region of the terrain surface, e.g., a mountainous or valley region. | EC TERRAIN_SURFACE_OBJECT | 888 |
| TEST_REFERENCE_TRACK | A surveyed reference track marking the centre of a test range; vessels undergoing testing must maintain position along this track. | 889 | |
| TEST_SITE | A site for the testing of technical products and equipment. | 890 | |
| TEXT_DESCRIPTION | A location at which a characteristic, or an activity pertaining to that location, is described or labelled. | 891 | |
| THEATRE | A building, room, or outdoors structure used for the presentation of plays, films, or other dramatic performances. | EC DRIVE_IN_THEATRE, EC OPERA_HOUSE | 892 |
| THEODOLITE_LINE | A line of known bearing from a fixed geographic location, which may be used to determine accurate positions of a vessel on certain test ranges. | 893 | |
| THERMAL_MATERIAL_CHARSET | A set of thermal characteristics of the material composing an object, e.g., thermal mass. | 894 | |
| TIDE_DATA_POINT | A location for which tabulated tidal stream data are given. | 895 | |
| TIDE_GAUGE | An instrument for measuring the height of the tide. | 896 | |
| TIDE_RIP_REGION | An expanse of water where small waves are formed on the surface by the meeting of opposing tidal currents or by a tidal current crossing an irregular bottom. | EC BOMBORA_REGION, EC BREAKER_REGION, EC OVERFALL_REGION | 897 |
| TIDEWAY | A natural watercourse in intertidal regions where water flows during the tidal ebb and flow. | 898 | |
| TIMBER_YARD | An open site for the storage of wooden lumber and timbers. | EC SAWMILL | 899 |
| TIME_FORECAST_BASE_SET | A set of objects that are predicted (forecasted) to exhibit certain characteristics at a common (base) time. | EC TIME_FORECAST_TAU_SET | 900 |
| TIME_FORECAST_TAU_SET | A set of objects that are predicted (forecasted) to exhibit certain characteristics at a common (offset) time from some reference (base) time; the offset time is commonly known as tau. | EC TIME_FORECAST_BASE_SET | 901 |
| TOWED_ARTILLERY | A towed large-calibre firing weapon that is mounted or manned by a crew; e.g., an anti-tank gun, howitzer or cannon. | 902 | |
| TOWER | A relatively tall structure of undefined purpose. | EC NON_COMMUNICATION_TOWER | 903 |
| TOWN | A concentration of dwellings, businesses, industry and other structures where people have settled, which is larger than a settlement and usually smaller than a city or urban region, and with a population of less than 25,000 inhabitants, e.g., a town or township. | 904 | |
| TOWN_HALL | A building that contains the offices of the public officials of a town and that houses the town council and courts. | EC ADMINISTRATION_BUILDING, EC CITY_HALL | 905 |
| TRACK_LINE | The path of travel as drawn on a chart and including the sounding information collected along the path. | 906 | |
| TRACK_SWATH | A region of horizontal depth coverage recorded by SONAR array systems. | 907 | |
| TRADING_POST | A station or store in a sparsely settled locale that has been established by traders to barter supplies for local products. | EC MARKET | 908 |
| TRAFFIC_SEPARATION_SCHEME | A routing measure for separating opposing streams of traffic by appropriate means, including the establishment of traffic lanes, i.e., a TSS. | 909 | |
| TRAIL | A path worn by the passage of people or animals. | 910 | |
| TRAINING_BUILDING | A building used exclusively for training of military, police, fire or rescue personnel in urban regions. | EC BUILDING, EC TRAINING_SITE | 911 |
| TRAINING_SITE | A site and associated structures which are reserved for the training of military, police, fire or rescue personnel. | EC TRAINING_BUILDING | 912 |
| TRANSPORTATION | An object supporting the transport of people or materials, e.g., a railroad, road, airport, or maritime route. | 913 | |
| TRANSPORTATION_BUILDING | A building intended to facilitate the transportation of people or materials. | 914 | |
| TRANSPORTATION_FACILITY | A site and associated buildings intended to facilitate the transportation of people or materials. | 915 | |
| TRANSPORTATION_STATION | A stopping place for the transfer of passengers and/or freight. | 916 | |
| TREE | An individual woody-perennial plant, having a self-supporting main stem or trunk. | EC SHRUB, EC TREELINE | 917 |
| TREED_TRACT | A tract of land covered by a group of woody-perennial plants having a self-supporting main stem or trunk, e.g., a copse, thicket, or tree stand. | EC BRUSH_LAND, EC FOREST, EC ORCHARD, EC PLANTATION | 918 |
| TREELINE | A relatively linear arrangement of woody-perennial plants, each having a self-supporting main stem or trunk. | EC FOREST, EC HEDGEROW, EC TREE | 919 |
| TRSRF_OBJECT_OR_REGION | An object located on, or a region of, the terrain surface, e.g., man-made structures, or mountainous regions. May be further delineated specifically as EC TERRAIN_SURFACE_OBJECT or EC TERRAIN_SURFACE_REGION. | 920 | |
| TSS_SYSTEM | A complex object consisting of a deep water route plus related navigational marks, either fixed or floating, which are placed to delimit specific routes for separating traffic, i.e., a TSS system. | EC DEEP_WATER_ROUTE, EC NAVIGATIONAL_MARK_AFLOAT, EC NAVIGATIONAL_MARK_FIXED | 921 |
| TUNA_NETS | A site where nets used for catching tuna have been deployed. | 922 | |
| TUNDRA | A prairie-like region in the arctic and sub-arctic climatic zones of the Earth, which sustains a growth of low vegetation. | 923 | |
| TUNNEL | An underground or underwater passage, open at both ends, and usually containing a road or railroad. | EC ENTRANCE, EC EXIT | 924 |
| TUNNEL_SHELTER | An underground structure where materials, products or personnel are sheltered. | 925 |