Table 5.4 -- EDCS Classifications whose label begins with A
| Label | Definition | Related concepts | Code |
| ACCESS_ZONE | A zone between a contact zone and the first possible clearing line, e.g., road, towing path, or passable road bank crest. | EC CONTACT_ZONE | 1 |
| ACOUSTIC_DEVICE | A device used for the collection of acoustic data. | 2 | |
| ACOUSTIC_STATION | The location of an acoustic data collection device. | 3 | |
| ADMINISTRATION_BUILDING | A building devoted to the act or process of administration or management. | EC CITY_HALL, EC COURTHOUSE, EC GOVERNMENT_BUILDING | 4 |
| ADMINISTRATIVE_BOUNDARY | A line of demarcation (boundary) between administratively controlled regions. | EC ADMINISTRATIVE_REGION | 5 |
| ADMINISTRATIVE_REGION | A region controlled by an administrative authority. | 6 | |
| AERATION_BED | A structure for adding air to water, by either passing air through the water or passing water through air. | EC FILTRATION_BED | 7 |
| AERATOR | A structure housing machinery for aerating liquids, typically potable water. | EC FILTRATION_PLANT | 8 |
| AERIAL_CABLE | A cable, or set of cables, which are strung between elevated supports as part of a conveyor system on which cars, buckets, or other carrier units are suspended. | EC AERIAL_CABLE_PYLON, EC CONVEYOR | 9 |
| AERIAL_CABLE_PYLON | A tower supporting aerial cables, which convey cars, buckets, or other suspended carrier units. | EC AERIAL_CABLE | 10 |
| AERONAUTICAL_COMM_SERVICE | Description of the communications to be used for various functions at an air terminal facility. | 11 | |
| AERONAUTICAL_NAVAID | Any visual or electronic device which provides point-to-point guidance (NAVAID) information or position data for aircraft. | 12 | |
| AGRICULTURAL_FACILITY | A site and associated structures involved in crop production, the raising of livestock, or the storage or transportation of either materials important to, or the results of, agricultural production. | EC FARM, EC LIVESTOCK_PEN, EC GRAIN_ELEVATOR, EC GREENHOUSE | 13 |
| AIR_ROUTE | A specific route designated for channelling the flow of traffic as necessary for the provision of air traffic services. | EC ATS_ROUTE_SGMT | 14 |
| AIR_WARNING_LIGHT | A light or set of lights marking an obstacle which constitutes a danger to air navigation. | 15 | |
| AIRCRAFT | A vehicle capable of operation mainly in the air (e.g., airplanes, helicopters, gliders, dirigibles and other craft); aircraft may also be located on, and move on, the ground when not in normal (or full) operation. | 16 | |
| AIRCRAFT_HANGAR | A building used for the storage of aircraft that are capable of atmospheric flight. | EC AIRCRAFT, EC AIRFIELD, EC AIRPORT | 17 |
| AIRCRAFT_MAINTENANCE_SHOP | A building, usually located at an airport, used for keeping aircraft in a condition of good repair or efficiency. | EC AIRCRAFT, EC AIRFIELD, EC AIRPORT | 18 |
| AIRCRAFT_STORAGE_SITE | A defined paved or hard-packed tract of land intended for long-term aircraft parking and storage. | EC AIRCRAFT, EC AIRFIELD, EC AIRPORT | 19 |
| AIRCRAFT_WRECKAGE | Wreckage of an aircraft, which is isolated, conspicuous, and can be used for navigation. | EC AIRCRAFT | 20 |
| AIRFIELD | A tract of land used for the takeoff and landing of aircraft. | EC AIRCRAFT, EC AIRFIELD, EC AIRPORT | 21 |
| AIRFIELD_REVETMENT | A barricade that protects aircraft, equipment, or facilities from hostile action, e.g., a revetment. | EC AIRCRAFT | 22 |
| AIRPORT | A defined tract of land or expanse of water used for landing, take-off, and movement of aircraft including associated buildings, runways and other facilities. | EC AIRCRAFT, EC AIRFIELD, EC AIRPORT | 23 |
| AIRPORT_LIGHTING | Lights used to: define and outline airfield features such as perimeters, runways and taxiways; guide aircraft while on the surface; and to provide guidance to aircraft on approach for landing. | EC AIRCRAFT, EC RUNWAY | 24 |
| AIRPORT_OR_AIRFIELD | A defined tract of land or expanse of water used for landing, take-off, and movement of aircraft including associated buildings and facilities. May be further delineated specifically as EC AIRPORT or EC AIRFIELD. | EC AIRCRAFT, EC AIRCRAFT_HANGAR, EC AIRPORT_TERMINAL, EC RUNWAY | 25 |
| AIRPORT_TERMINAL | A structure located at an airport or airfield used for disembarking or taking on passengers or cargo. | EC AIRFIELD, EC AIRPORT | 26 |
| AIRSPACE | A region of air that is controlled by a sovereign country, whether over land or water. | EC CONTROLLED_AIRSPACE, EC UNCONTROLLED_AIRSPACE | 27 |
| AIRSPACE_BOUNDARY_SGMT | A single segment of an airspace boundary. | EC AIRSPACE | 28 |
| AIRSTRIP | A land airfield with very limited facilities. | EC AIRFIELD, EC AIRPORT | 29 |
| ALKALI_FLAT | A sterile plain containing an excess of alkali usually occurring in the bottom of an under drained basin in an arid or semi-arid region; the ground may be soft and have low shearing and bearing strength, and a high organic content. | 30 | |
| ALLUVIAL_FAN | A gently sloping fan-shaped terrain surface configuration usually found near the lower termination of a canyon. | 31 | |
| AMBASSADORIAL_RESIDENCE | A building serving as the home of a diplomatic official of the highest rank appointed and accredited as representative in residence by one government or sovereign to another. | EC DIPLOMATIC_BUILDING, EC EMBASSY, EC EMBASSY_COMPOUND | 32 |
| AMPHIBIOUS_VEHICLE | A vehicle capable of operation either in the ocean/water or on land. | 33 | |
| AMPHITHEATRE | An oval or circular building with seats rising in tiers around the central open space, used for entertainment or public events. | EC AUDITORIUM, EC STADIUM | 34 |
| AMUSEMENT_PARK | A predominately man-made facility equipped with recreational devices. | EC FAIRGROUNDS, EC PARK | 35 |
| AMUSEMENT_PARK_ATTRACTION | A large structure located in an amusement park. | EC AMUSEMENT_PARK | 36 |
| ANCHOR | A device normally placed on the sea bottom and attached to a cable or rope, and used to position a vessel, boat, or any other floating structure. | 37 | |
| ANCHOR_BERTH | A designated expanse of water where a single vessel, seaplane, oilrig, or other watercraft is anchored or may anchor. | 38 | |
| ANCHORAGE | An expanse of water where vessels may anchor. | EC ANCHORAGE_COMPLEX | 39 |
| ANCHORAGE_COMPLEX | A complex object consisting of an anchorage plus related navigational marks, either fixed or afloat. | EC ANCHORAGE, EC NAVIGATIONAL_MARK_AFLOAT, EC NAVIGATIONAL_MARK_FIXED | 40 |
| ANIMAL_SANCTUARY | A tract of land or expanse of water that has been set aside for the preservation and protection of wildlife. | 41 | |
| APARTMENT_HOUSE | A multi-residence building containing rental accommodations for hire on a long-term basis. | EC MULTI_UNIT_DWELLING, EC ROWHOUSE | 42 |
| APRON | A usually paved tract of land located adjacent to a runway or other airfield facility where aircraft can park, load or unload, refuel, or undergo servicing. | EC HARDSTAND | 43 |
| APRON_OR_HARDSTAND | A defined paved or hard-packed tract of land at an airport or heliport intended for aircraft parking, e.g., an apron or hardstand. May be further delineated specifically as EC APRON or EC HARDSTAND. | EC AIRFIELD, EC AIRPORT | 44 |
| AQUEDUCT | A pipe or artificial channel designed to transport water from a remote source, usually by gravity. | EC PENSTOCK | 45 |
| AQUEDUCT_CN | An abstract description of the connectivity (centreline or nexus) afforded by an aqueduct. | EC AQUEDUCT | 46 |
| ARCADE | A covered passageway composed of arches and pillars, usually open at one or both sides. | 47 | |
| ARCHAELOGICAL_SITE | A site where remains of ancient civilizations or human activity have been discovered. | EC RUINS | 48 |
| ARMISTICE_LINE | A boundary established by opposing political groups as a result of cessation of hostilities. | 49 | |
| ARMOURED_BRIDGE_LAUNCHER | An armoured combat support vehicle capable of launching an AVLB. | 50 | |
| ARMOURED_FIGHTING_VEHICLE | An armoured combat vehicle mounted with guns or other armaments, often used to move groups of soldiers; e.g., infantry fighting vehicle, armoured personnel carrier, self-propelled mortar, armoured car, chemical reconnaissance vehicle, or anti-tank guided missile launcher. | 51 | |
| ARMOURED_TRACKED_VEHICLE | A heavily armoured closed combat vehicle mounted with cannon and guns and that moves on caterpillar treads, e.g., a tank. | 52 | |
| ARMOURED_UTILITY_VEHICLE | An armoured combat support vehicle; e.g., engineering vehicle, tracked load carrier, towing vehicle, or recovery vehicle. | 53 | |
| ARMOURY | A building for storing arms and military equipment, especially one serving as headquarters for military reserve personnel. | 54 | |
| ARRESTING_GEAR | Devices such as cables or barriers that can be used to stop an aircraft immediately upon landing. | 55 | |
| ASPHALT_LAKE | A pool (lake) of liquid asphalt. | 56 | |
| ASSEMBLY_PLANT | A site and associated buildings used for the purpose of combining manufactured parts to make a completed product. | 57 | |
| ASTRONOMICAL_STATION | A structure used for the scientific study of matter in outer space, especially the positions, dimensions, distribution, motion, composition, energy, and evolution of celestial bodies or phenomena. | EC SPACE | 58 |
| ATHLETIC_COMPLEX | A site and associated buildings used for recreational exercise and major sports competitions, which typically serves a large metropolitan region. | EC RECREATIONAL_COMPLEX, EC STADIUM | 59 |
| ATHLETIC_FIELD | An open tract of land where sporting events, exercises, or games occur. | EC ATHLETIC_COMPLEX | 60 |
| ATM_ANALYSIS_CHARSET | A set of characteristics of the atmosphere (e.g., clouds, rain, or wind) determined through a process of analysis. | EC ATMOSPHERE | 61 |
| ATM_ANALYSIS_SRF_CHARSET | A set of characteristics of the atmosphere (e.g., clouds, rain, or wind) determined through a process of analysis, which are associated with a specific type of generally horizontal surface, e.g., ground level, mean sea level, or constant altitude. | EC ATMOSPHERE, EC ATM_ANALYSIS_CHARSET | 62 |
| ATM_ANALYSIS_TRSRF_CHARSET | A set of characteristics of the atmosphere (e.g., clouds, rain, or wind) determined through a process of analysis, which are located at/near the terrain surface, e.g., ground or sea level. | EC ATMOSPHERE, EC ATM_ANALYSIS_CHARSET | 63 |
| ATM_ANALYSIS_VOLUME_CHARSET | A set of characteristics of the atmosphere (e.g., clouds, rain, or wind) determined through a process of analysis, which occur within a three-dimensional region. | EC ATMOSPHERE, EC ATM_ANALYSIS_CHARSET | 64 |
| ATM_CLIM_CHARSET | A set of climatologic characteristics of the atmosphere, e.g., clouds, rain, or wind. | EC ATMOSPHERE | 65 |
| ATM_CLIM_LOCAL_CHARSET | A localized (e.g., at a point) set of climatologic characteristics of the atmosphere, e.g., temperature, pressure, or humidity. | EC ATMOSPHERE, EC ATM_CLIM_CHARSET | 66 |
| ATM_CLIM_SURFACE_CHARSET | A set of climatologic characteristics of the atmosphere (e.g., clouds, rain, or wind) associated with a specific type of generally horizontal surface, e.g., ground level, mean sea level, or constant altitude. | EC ATMOSPHERE, EC ATM_CLIM_CHARSET | 67 |
| ATM_CLIM_TRSRF_CHARSET | A set of climatologic characteristics of the atmosphere (e.g., clouds, rain, or wind) at the terrain surface, e.g., ground or sea level. | EC ATMOSPHERE, EC ATM_CLIM_CHARSET | 68 |
| ATM_FORECAST_CHARSET | A set of forecasted characteristics of the atmosphere, e.g., clouds, rain, or wind. | EC ATMOSPHERE | 69 |
| ATM_FORECAST_SRF_CHARSET | A set of forecasted characteristics of the atmosphere (e.g., clouds, rain, or wind) associated with a specific type of generally horizontal surface, e.g., ground level, mean sea level, or constant altitude. | EC ATMOSPHERE, EC ATM_FORECAST_CHARSET | 70 |
| ATM_FORECAST_TRSRF_CHARSET | A set of forecasted characteristics of the atmosphere (e.g., clouds, rain, or wind) at the terrain surface, e.g., ground or sea level. | EC ATMOSPHERE, EC ATM_FORECAST_CHARSET | 71 |
| ATM_FRCST_LOCAL_CHARSET | A localized (e.g., at a point) set of forecasted characteristics of the atmosphere, e.g., temperature, pressure, or humidity. | EC ATMOSPHERE, EC ATM_FORECAST_CHARSET | 72 |
| ATM_FRCST_PROFILE_CHARSET | A localized vertical profile set of forecasted characteristics of the atmosphere, e.g., temperature, pressure, or humidity. | EC ATMOSPHERE, EC ATM_FORECAST_CHARSET | 73 |
| ATM_FRCST_VOLUME_CHARSET | A set of forecasted characteristics of the atmosphere (e.g., clouds, rain, or wind) occurring within a three-dimensional region. | EC ATMOSPHERE, EC ATM_FORECAST_CHARSET | 74 |
| ATM_OBS_CHARSET | A set of observed characteristics of the atmosphere, e.g., temperature, pressure, or humidity. | EC ATMOSPHERE | 75 |
| ATM_OBS_LOCAL_CHARSET | A set of locally observed characteristics of the atmosphere, e.g., temperature, pressure, or humidity. | EC ATMOSPHERE, EC ATM_OBS_CHARSET | 76 |
| ATM_OBS_PROFILE_CHARSET | A localized vertical profile set of observed characteristics of the atmosphere, e.g., temperature, pressure, or humidity. | EC ATMOSPHERE, EC ATM_OBS_CHARSET | 77 |
| ATMOSPHERE | The envelopes of gases surrounding the earth and held to it by the force of gravity, consisting of four distinct layers, whose boundaries are not precise: the troposphere, stratosphere, mesosphere, and thermosphere. | 78 | |
| ATS_ROUTE_SGMT | A portion of a route to be flown, as defined by two consecutive significant points specified in a flight plan; these are either a continental or insular geographical location, or a point at which a definite radio fix can be established. | EC AIR_ROUTE | 79 |
| AUDITORIUM | A large building for public meetings or performances. | 80 | |
| AUTOMOTIVE_PLANT | A site and associated buildings used for the purpose of manufacturing automobiles and/or trucks. | EC ASSEMBLY_PLANT | 81 |
| AUTOMOTIVE_VEHICLE_STATION | A structure at, or in, which motor vehicles are refuelled, serviced, and sometimes repaired, e.g., a filling or gas station. | 82 | |
| AVIATION_WAYPOINT | A predetermined geographical position (waypoint), used by aviators for route instrument approach definition, progress reporting, to change communications frequency, or similar purposes. | 83 |