Table 5.22 — ECs whose label begins with R
| Label | Concept definition | Code |
| RACE_TRACK | A course for racing (for example: racing <NON_HUMAN_ANIMAL>s and/or racing <MOTOR_VEHICLE>s); a racetrack. | 929 |
| RADAR_DEVICE | A <DEVICE> used for the reception or transmission of radar signals. | 930 |
| RADAR_LINE | A <LINE> shown on a marine <MAP> corresponding to the <LINE>s seen on radar displays of <HARBOUR>s; a radar line. | 931 |
| RADAR_MATERIAL_PROPERTY_SET | A <PROPERTY_SET> describing the radar properties of the <MATERIAL>s composing an <OBJECT>. | 932 |
| RADAR_RECEIVER | A <DEVICE> used for the reception of radar signals; a radar receiver. | 933 |
| RADAR_REFERENCE_LINE | A <LINE> along which <VESSEL>s are guided by a traffic control centre located in a <RADAR_STATION>; a radar reference line. This <LINE> is shown on a marine <MAP> in proximity to a <MARINE_ROUTE>. | 934 |
| RADAR_STATION | A <RADAR_DEVICE> and support <STRUCTURE>s; a radar station. | 935 |
| RADAR_TRANSMITTER | A <DEVICE> used for the transmission of radar signals; a radar transmitter. | 936 |
| RADIOLOGIC_HAZARD_REGION | A <REGION> in which a radiologic substance is present that can kill, seriously injure, or incapacitate a <HUMAN> and/or <ANIMAL> through its physiological properties. The radiologic substance is usually dispersed over a <SURFACE> and/or within the <ATMOSPHERE>. | 937 |
| RAIL_HEAD | A <LOCATION> that is the furthest point reached by a <RAILWAY> where <EQUIPMENT> and/or <MATERIAL>s are loaded onto or unloaded from <RAIL_WAGON>s; a rail-head [SOED, "rail-head", 1] or rail terminus. | 938 |
| RAIL_TRANSFER_POINT | A <LOCATION> where <EQUIPMENT> and/or <MATERIAL>s may be loaded onto or unloaded from a <RAIL_WAGON>; a rail transfer point. | 939 |
| RAIL_WAGON | A <GROUND_VEHICLE> that is usually not self-propelled and that travels on a <RAILWAY_TRACK>; a rail wagon or a railroad car (US). | 940 |
| RAILWAY | A <LAND_TRANSPORTATION_ROUTE> consisting of one or more <RAILWAY_TRACK>s; a railway, or a railroad (US). | 941 |
| RAILWAY_NEXUS | A representation of one or more <RAILWAY>s, especially in a <BUILT_UP_REGION>; a railway centre-line or railway nexus. | 942 |
| RAILWAY_SIDETRACK | A stretch of <RAILWAY_TRACK> connected to a main <RAILWAY> and used for temporary storage, loading, and/or unloading; a railway sidetrack. | 943 |
| RAILWAY_SIDING | A short stretch of <RAILWAY_TRACK> connected at both ends to a main <RAILWAY> and used to store <RAIL_WAGON>s or enable <TRAIN>s on the same line to pass; a railway siding [SOED, "siding", II.7.a]. | 944 |
| RAILWAY_SIGNAL_BOX | Automated <EQUIPMENT> from which signals are sent to control the movements of <TRAIN>s; a signal box or signal tower. | 945 |
| RAILWAY_SIGNAL_STRUCTURE | An automated or manned <STRUCTURE> located adjacent to a <RAILWAY> that displays control information to passing <TRAIN>s; a railway signal structure. | 946 |
| RAILWAY_SIGNALMAN_HOUSE | A manned <STRUCTURE> located adjacent to a <RAILWAY> that displays control information to passing <TRAIN>s; a signalman house. | 947 |
| RAILWAY_SPUR | A short <RAILWAY_TRACK> that connects with the main <RAILWAY> at one end only; a railway spur [AHD, "spur track"]. | 948 |
| RAILWAY_STATION | A <BUILDING> or stopping place along a <RAILWAY> for taking on and letting off passengers or for servicing; a railway station. | 949 |
| RAILWAY_STORAGE_REPAIR- _BUILDING |
A <BUILDING> that is used for the servicing, repair, and/or storage of <RAIL_WAGON>s and related <EQUIPMENT>. | 950 |
| RAILWAY_STORAGE_REPAIR- _FACILITY |
A <FACILITY> used for the servicing, repair, and/or storage of <RAIL_WAGON>s and related <EQUIPMENT>. | 951 |
| RAILWAY_SWITCH | A <DEVICE> integrated with a <RAILWAY_TRACK> with which the rails may be switched to permit access to another <RAILWAY_TRACK>. | 952 |
| RAILWAY_TABLE | A rotating platform with <RAILWAY_TRACK>s used for turning <LOCOMOTIVE_ENGINE>s or <RAIL_WAGON>s; a railway table [SOED, "turntable", a]. | 953 |
| RAILWAY_TRACK | A rail or two parallel rails on which a <TRAIN>, tram, or <RAIL_WAGON> runs; a railway track. | 954 |
| RAILWAY_TURNTABLE | A <RAILWAY_TABLE>, which may be enclosed within a <STRUCTURE>; a railway turntable. | 955 |
| RAILWAY_YARD | A <SYSTEM> of <RAILWAY_TRACK>s and associated <STRUCTURE>s that are located within defined limits and that provide for loading, unloading, and/or assembling <TRAIN>s; a railway yard or marshalling yard. | 956 |
| RAILWAY_YARD_NEXUS | A representation of a <RAILWAY_YARD> as it connects to related <RAILWAY>s; a railway yard centre-line or railway yard nexus. | 957 |
| RAIN | <PRECIPITATION> of <PARTICLE>s of liquid <WATER> either in the form of drops of more than 0,5 millimetres in <<OUTSIDE_DIAMETER >> or in the form of widely scattered drops; rain. | 958 |
| RAIN_REGION | A <REGION> in which <RAIN> is falling. | 959 |
| RAMP | An inclined plane, usually man-made, for moving between two levels; a ramp. | 960 |
| RAMPART | A defensive <WALL>, which is sometimes equipped with <FIELD_ARTILLERY>, that is built to defend a <FORT> or a similar <DEFENSIVE_POSITION>; a bastion or rampart. | 961 |
| RANGER_STATION | A <BUILDING> housing a warden employed to maintain and protect a <FOREST> or other natural <REGION> of a <PLANETARY_SURFACE>; a ranger station. | 962 |
| RAPID | A steep descent in a <WATERCOURSE> causing a swift <WATER_CURRENT>; a rapid [SOED, "rapid", 1]. | 963 |
| RAY_PATH | An imaginary <LINE> along which energy associated with a <LOCATION> on a wave front moves; a ray path. | 964 |
| RECONNAISSANCE_HELICOPTER | A <HELICOPTER> designed or designated for reconnaissance operations. | 965 |
| RECONNAISSANCE_WINGED_AIRCRAFT | A winged <AIRCRAFT> designed or designated for reconnaissance operations. | 966 |
| RECREATIONAL_FACILITY | A <FACILITY> used for recreation; a recreational facility. | 967 |
| RECREATIONAL_PIER | A <PIER> used for recreational purposes and not intended as a berthing place for <VESSEL>s. | 968 |
| RECYCLING_SITE | A <SITE> engaged in the wrecking, dismantling, storage, recycling, and/or resale of discarded or scrap products. | 969 |
| REEF | An elevation of <ROCK> or <CORAL> at or near enough to the <WATERBODY_SURFACE> to be a danger to surface <VESSEL>s. | 970 |
| REFORMATORY_BUILDING | A <BUILDING> used for the discipline, reformation, and training of young and/or first offenders; a reformatory building. | 971 |
| REFORMATORY_FACILITY | A <FACILITY> including one or more <REFORMATORY_BUILDING>s; a reformatory facility. | 972 |
| REFUELLING_TRACK | A specific <AIR_TRANSPORTATION_ROUTE> designated for channelling the flow of air traffic as necessary for the purpose of refuelling; a refuelling track. | 973 |
| REFUGEE_COMPOUND | A <FACILITY>, which is usually temporary, constructed to house groups of <HUMAN>s fleeing from their communities in search of refuge (for example: from war, political oppression, and/or religious persecution); a refugee compound. | 974 |
| REFUSE_BIN | A <CONTAINER> that: is of several cubic metres capacity; is used for the collection of refuse; and is designed to be hoisted and emptied into a specially equipped <TRUCK> or, occasionally, hauled away; a refuse bin. | 975 |
| REGION | A usually contiguous subset of the environment that may include <TERRAIN>, a <WATERBODY>, the <ATMOSPHERE>, and/or <SPACE>; a region. | 976 |
| REGION_PROPERTY_SET | A <PROPERTY_SET> describing a <REGION>. | 977 |
| REGIONAL_PARK | A significant <TRACT> set aside for public use that generally has few or no <BUILDING>s, is located away from <BUILT_UP_REGION>s, and is maintained for recreational and ornamental purposes; a regional park. | 978 |
| REGULATED_LINE | A <BOUNDARY> established to regulate matters between nations or groups over a specific territory; a regulated line. EXAMPLES Mandate line, convention line. |
979 |
| RELATED_OBJECT_SET | A <NON_EMPTY_SET> of related <OBJECT>s. | 980 |
| RELATIVE_DISPLACEMENT_LINE | A <LINE> connecting <LOCATION>s having a constant relative vertical offset from the <TERRAIN>; a relative displacement line. | 981 |
| RELIGIOUS_COMMUNITY | A <NON_EMPTY_SET> of <DWELLING>s, <BUILDING>s, and/or other <STRUCTURE>s that houses a community of <HUMAN>s under religious vows; a religious community. EXAMPLES <CONVENT>, <MONASTERY>. |
982 |
| REPAIR_BUILDING | A <BUILDING> used for restoring broken and/or damaged goods (for example: <EQUIPMENT>) to sound condition; a repair building. | 983 |
| REPAIR_FACILITY | A <FACILITY> including one or more <REPAIR_BUILDING>s; a repair facility. | 984 |
| REPTILE | A <VERTEBRATE> of the class Reptilia, the members of which are characterized by scaly impermeable skin, poikilothermy, and oviparous (or ovoviviparous) reproduction; a reptile [SOED, "reptile", 1]. EXAMPLES Snake, lizard, turtle, crocodile. |
985 |
| RESERVE | A <REGION> set apart by a governmental body, institution, or individual for a special purpose; a reserve or reservation [SOED, "reservation", 7.a]. | 986 |
| RESERVOIR | A <LOCATION> where anything is collected and stored, generally in large quantity; especially a pond, <LAKE>, or <WATERBODY_BASIN>, either natural or artificial, for the storage, regulation, and control of <WATER>; a reservoir. | 987 |
| RESERVOIR_NEXUS | A representation of a <RESERVOIR> as it connects to related <RIVER_NEXUS>s; a reservoir centre-line or reservoir nexus. | 988 |
| RESIDENTIAL_REGION | A <REGION> of <BUILDING>s primarily devoted to housing a population, as well as providing a variety of supporting services (for example: a <POST_OFFICE>, a grocery store, a dry cleaners, a florist, a <RESTAURANT>, and/or a small <RETAIL_FACILITY>); a residential region. | 989 |
| RESTAURANT | A <BUILDING> or outdoor <SITE> where meals are served to the public; a restaurant [AHD, "restaurant"]. | 990 |
| RETAIL_FACILITY | A <FACILITY> that is used for retail (for example: for the sale of goods or commodities in small quantities directly to consumers); a retail facility. | 991 |
| REVERBERATION | Sound waves scattered back towards their source from an acoustically reflective <SURFACE> or volume; reverberation. | 992 |
| REVETMENT | A <BARRIER> protecting a <RAMPART> or <WALL>; a revetment [SOED, "revetment", 2]. | 993 |
| RICE_FIELD | A <TRACT> that is periodically covered with <WATER> and is used for growing rice; a rice field. | 994 |
| RIDGE | Relatively high <TERRAIN> formed as a long and narrow crest that is surrounded by lower <TERRAIN>; a ridge. | 995 |
| RIDGE_LINE | A <LINE> delineating the top of a <RIDGE>; a ridge line. | 996 |
| RIG | A <SUPERSTRUCTURE> fitted for drilling or lifting operations for extraction and/or exploitation of natural resources; a rig or superstructure. | 997 |
| RIME | A white or milky and opaque granular deposit of <ICE> formed by the rapid freezing of supercooled drops of <WATER> as they impinge upon an exposed <OBJECT>; rime. It is denser and harder than <HOAR_FROST>, but lighter, softer, and less transparent than <ICE_GLAZE>. | 998 |
| RIP_CURRENT | A strong, narrow, surface <WATER_CURRENT> flowing away from a <SHORELINE>. | 999 |
| RIPRAP | A loose assemblage of broken <STONE>s or similar <MATERIAL> that is erected along a <WATERBODY> or on soft <TERRAIN> as either a foundation or to protect the underlying <SURFACE> from erosion; riprap. | 1000 |
| RIVER | A natural flowing <WATERCOURSE>; a river or stream. | 1001 |
| RIVER_BANK | The <WATERBODY_BANK> of a <RIVER>. | 1002 |
| RIVER_GAUGING_STATION | A <DEVICE> and support <STRUCTURE>s that monitors flow in a <RIVER>; a river gauging station. | 1003 |
| RIVER_NEXUS | A representation of one or more <RIVER>s; a river centre-line or river nexus. | 1004 |
| RIVER_ROUTE | The <MARINE_ROUTE> in a <RIVER> suitable for the largest allowed <VESSEL>s. | 1005 |
| RIVER_VANISHING_POINT | The <LOCATION> at which a <RIVER> passes into the <TERRAIN>; a river vanishing point. | 1006 |
| ROAD | A <LAND_TRANSPORTATION_ROUTE> maintained for use by <MOTOR_VEHICLE>s; a road. | 1007 |
| ROAD_INTERCHANGE | A connection designed to provide traffic access from one <ROAD> to another; a road interchange. | 1008 |
| ROAD_NEXUS | A representation of one or more <ROAD>s, especially in a <BUILT_UP_REGION>; a road centre-line or road nexus. | 1009 |
| ROAD_ROUTE_MARKER | A <DISPLAY_SIGN> used to designate a <ROAD>; a route marker. | 1010 |
| ROADSIDE_REST_STOP | A <SITE> adjacent to a <ROAD> usually having <FACILITY>s for <HUMAN>s and/or <MOTOR_VEHICLE>s; a roadside rest stop. | 1011 |
| ROCK | A hard mineral <MATERIAL> that occurs in bulk as part of a <PLANET> and is either exposed at the <PLANETARY_SURFACE> or located underneath; rock [SOED, "rock", n.1.3]. | 1012 |
| ROCK_DROP | A massive assemblage of <MATERIAL>, usually in the form of large concrete blocks and/or cylinders, suspended above or beside a <LAND_TRANSPORTATION_ROUTE>, ready to be activated as a potential <BARRIER>; a rock drop. | 1013 |
| ROCK_SHED | A <PROTECTION_SHED> against slides of <ROCK>; a rock shed. | 1014 |
| ROCKY_LANDMARK | An isolated rocky formation or single large <ROCK> that is located in its entirety above the high water mark of a <WATERBODY_SURFACE>, that is conspicuous and would appear to a mariner as a single <LOCATION> on <LAND>, and that would be appropriate for use in marine navigation; a rocky landmark. | 1015 |
| ROCKY_OUTCROP | An outcrop, layers (strata), or beds of <ROCK> on <LAND>; a rocky outcrop. | 1016 |
| RODENT | A <MAMMAL> of the order Rodentia, the members of which are characterized by strong continuously-growing incisor teeth and no canines; a rodent [SOED,"rodent", A]. EXAMPLES Rat, mouse, squirrel, vole, beaver. |
1017 |
| ROLLING_BLOCK | A massive assemblage of <MATERIAL> (usually in the form of concrete blocks or cylinders) that is positioned alongside a <LAND_TRANSPORTATION_ROUTE> and is ready to be activated when needed as a potential <BARRIER> to an advancing enemy ground force; a rolling block. | 1018 |
| ROOF | The outside upper covering of a <BUILDING>; a building roof [SOED, "roof", 1.a]. | 1019 |
| ROOF_ASSEMBLY | A <ROOF> and its structural support; a roof assembly. | 1020 |
| ROOM | An interior portion of a <BUILDING> that is divided off by <BUILDING_COMPONENT>s (for example: <WALL>s, <ROOM_CEILING>s, room <FLOOR>s, and/or partitions); a room [SOED, "room", 8.a]. | 1021 |
| ROOM_CEILING | The overhead inside lining or suspended undercovering of a <ROOM>; a room ceiling. | 1022 |
| ROUNDHOUSE | A circular <BUILDING> containing a <RAILWAY_TURNTABLE>; a roundhouse [AHD, "roundhouse", 1]. | 1023 |
| ROUTE | A way or course of (especially regular) travel from one <LOCATION> to another <LOCATION>; a route [SOED, "route", 1a.]. | 1024 |
| ROUTE_COMPONENT | A <COMPONENT> of a <ROUTE>. | 1025 |
| ROUTE_CONSTRICTION | A <LOCATION> where a <ROUTE> narrows from its normal <<WIDTH>>; a constriction. | 1026 |
| ROUTE_EXPANSION | A <LOCATION> where a <ROUTE> widens beyond its normal <<WIDTH>>; an expansion. | 1027 |
| ROUTE_LANE | A <COMPONENT> of a <LAND_TRANSPORTATION_ROUTE> that is typically designated by painted lines, is used to segregate the flow of <GROUND_VEHICLE>s according to speed or intended <DIRECTION>, and has enough <<WIDTH>> to pass a single file of <GROUND_VEHICLE>s; a route lane [SOED, "lane", 2.d]. | 1028 |
| ROUTE_SHOULDER | A <TERRAIN_STRIP> along either side of and adjacent to a <ROAD> or <RUNWAY> and not normally used by <MOTOR_VEHICLE>s or <AIRCRAFT> but provided as an allowable margin in case of emergencies; a route shoulder. | 1029 |
| ROUTE_WIDTH_CHANGE | A <LOCATION> where a <ROUTE> narrows or expands in <<WIDTH>>. | 1030 |
| ROWHOUSE | One of a series of essentially identical residential <BUILDING>s situated side by side and sharing a common <WALL>; a row house. | 1031 |
| RUBBLE | The rubbish of decayed or demolished <STRUCTURE>s, especially including fragments of brick or <STONE>; rubble [SOED, "rubble", 1]. | 1032 |
| RUINS | The deteriorated remains of an unspecified <STRUCTURE>; a ruin. | 1033 |
| RUN_OFF | <WATER> that is carried off a <TRACT> by <RIVER>s after having fallen as <RAIN>; run-off. | 1034 |
| RUNWAY | A defined <TRACT>, usually rectangular, used for the conventional landing and take-off of <AIRCRAFT>; a runway. The <RUNWAY_STOPWAY> is excluded from this <TRACT>. | 1035 |
| RUNWAY_APPROACH_OIS | An imaginary air navigation OIS consisting of an inclined plane, symmetrical about the centre-line of the <RUNWAY>, beginning 60,96 metres (200 feet) outward of the <RUNWAY_ENDPOINT>, at the <<TERRAIN_ELEVATION>> of the <RUNWAY_ENDPOINT>, and extending for 12 903,04 metres (42 332 feet, or 7 nautical miles minus 200 feet of <RUNWAY_PRIMARY_OIS>); a Runway Approach OIS. The slope of this <SURFACE> is 50 to 1 along the centre-line of the <RUNWAY> extended until it reaches a height of 152,4 metres (500 feet) above the <<TERRAIN_ELEVATION>> of the <RUNWAY_ENDPOINT> with the lowest <<TERRAIN_ELEVATION>> on the <AIRPORT>. It then continues horizontally to a point 12 964 metres (42 532 feet or 7 nautical miles) from the <RUNWAY_ENDPOINT>. The <<WIDTH>> of this <SURFACE> at the <RUNWAY_ENDPOINT> is the same as the <RUNWAY_PRIMARY_OIS>, it flares uniformly, and the <<WIDTH>> at 12 964 metres (42 532 feet) distance is 4 236,4 metres (13 899 feet). | 1036 |
| RUNWAY_CONICAL_OIS | An imaginary air navigation OIS extending from the periphery of the <RUNWAY_INNER_HORIZONTAL_OIS> outward and upward at a slope of 20 to 1 for a horizontal distance of 2 133,6 metres (7 000 feet) to a height of 152,4 metres (500 feet) above the height of the lowest height <RUNWAY_ENDPOINT> and 4 419,6 metres (14 500 feet) from the centre-line of the <RUNWAY>; a Runway Conical OIS. | 1037 |
| RUNWAY_CONICAL_OUTER- _HORIZONTAL_TRANSITIONAL_OIS |
An imaginary air navigation OIS connecting the side of the <RUNWAY_APPROACH_OIS> to the sides of both the <RUNWAY_CONICAL_OIS> and <RUNWAY_OUTER_HORIZONTAL_OIS>; a runway conical outer horizontal transitional OIS. This triangular <SURFACE> extends outward, perpendicular to the extended centre-line of the <RUNWAY> from the edges of the <RUNWAY_APPROACH_OIS>, at a 7 to 1 slope. The slope of this <SURFACE> is referenced to the centre-line of the <RUNWAY>. | 1038 |
| RUNWAY_DISPLACED_THRESHOLD | The designated beginning of the portion of a <RUNWAY> usable for landing that is located at a point on the <RUNWAY> other than the designated <RUNWAY_ENDPOINT>, and typically exists at each end of the <RUNWAY>; a runway displaced threshold. | 1039 |
| RUNWAY_ENDPOINT | One of the <LOCATION>s at each end of the centre-line of a <RUNWAY>; a runway endpoint. | 1040 |
| RUNWAY_INNER_HORIZONTAL_OIS | An imaginary air navigation OIS defined by two half circles centred on the <RUNWAY_ENDPOINT>s and joined by tangents; a runway inner horizontal OIS. The <<RADIUS>>s of the half circles are 2 286 metres (7 500 feet) and the tangents are parallel to the centre-line of the <RUNWAY> at a distance of 2 286 metres (7 500 feet). This <SURFACE> extends horizontally outward from the periphery of the <RUNWAY_PRIMARY_APPROACH_TRANSITIONAL_OIS> at a <<TERRAIN_ELEVATION>> of 45,7 metres (150 feet) above the <<TERRAIN_ELEVATION>> of the <RUNWAY_ENDPOINT> of lowest <<TERRAIN_ELEVATION>>. | 1041 |
| RUNWAY_MARKINGS | A symbol or group of symbols (for example: threshold markings, runway side stripes, and/or <CENTRE_LINE>s) displayed on the surface of a <RUNWAY> to convey aeronautical information. | 1042 |
| RUNWAY_NEXUS | A representation of one or more <RUNWAY>s; a runway centre-line or runway nexus. | 1043 |
| RUNWAY_OUTER_HORIZONTAL_OIS | An imaginary air navigation OIS consisting of a horizontal plane, located 152,4 metres (500 feet) above the <<TERRAIN_ELEVATION>> of the <RUNWAY_ENDPOINT> with the lowest <<TERRAIN_ELEVATION>>, extending outward from the outer periphery of the <RUNWAY_CONICAL_OIS> for a horizontal distance of 8 544,2 metres (28 032 feet) reaching a distance of 19 963,8 metres (42 532 feet) from the centre-line of the <RUNWAY>; a runway outer horizontal OIS. | 1044 |
| RUNWAY_OVERRUN | In military aviation exclusively, a stabilized or paved <TRACT> immediately beyond the end of a <RUNWAY>, of the same <<WIDTH>> as the <RUNWAY> plus <ROUTE_SHOULDER>s, centred on the extended centre-line of the <RUNWAY>. | 1045 |
| RUNWAY_PRIMARY_APPROACH- _TRANSITIONAL_OIS |
An imaginary air navigation OIS connecting the sides of the <RUNWAY_PRIMARY_OIS> and <RUNWAY_APPROACH_OIS> to the <RUNWAY_INNER_HORIZONTAL_OIS>; a runway primary approach transitional OIS. This <SURFACE> extends outward, perpendicular to the centre-line of the <RUNWAY>, from the edges of the <RUNWAY_PRIMARY_OIS>, at a slope of 7 to 1, to a <<WIDTH>> of 320 metres (1 050 feet) and a <<TERRAIN_ELEVATION>> of 45,7 metres (150 feet) above the <<TERRAIN_ELEVATION>> of the <RUNWAY_ENDPOINT> of lowest <<TERRAIN_ELEVATION>>. | 1046 |
| RUNWAY_PRIMARY_OIS | An imaginary air navigation OIS that is longitudinally centred on a <RUNWAY>, equal to the <<LENGTH>> of the <RUNWAY> plus 304,8 metres (1 000 feet) on each end, and of a <<WIDTH>> of 609,6 metres (2 000 feet); a runway primary OIS. | 1047 |
| RUNWAY_RADAR_REFLECTOR | A <DEVICE>, normally placed near the threshold of a <RUNWAY>, used for reflecting radar signals; a runway radar reflector. | 1048 |
| RUNWAY_STOPWAY | A <TRACT> beyond the take-off <RUNWAY_ENDPOINT> that is designated as able to support an <AIRCRAFT> during an aborted take-off; a runway stopway. | 1049 |
| RUNWAY_TOUCHDOWN_ZONE | The first 914,4 metres (3 000 feet) of the <RUNWAY> beginning at the <RUNWAY_DISPLACED_THRESHOLD>; a runway touchdown zone. | 1050 |
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