Table 5.8 — ECs whose label begins with D
| Label | Concept definition | Code |
| DAM | A permanent <BARRIER> across a <WATERCOURSE> that is used to impound <WATER> and/or to control its flow; a dam. | 304 |
| DATA_QUALITY_BOUNDARY | A <BOUNDARY> between two <DATA_QUALITY_REGION>s. | 305 |
| DATA_QUALITY_REGION | A <REGION> with specific data quality characteristics. | 306 |
| DATUM | An <OBJECT> used as a reference for defining spatial aspects of other <OBJECT>s; a datum. | 307 |
| DECONTAMINATION_PAD | A <SITE> where a radiologically, biologically, and/or chemically contaminated <AIRCRAFT> is sent for decontamination; a decontamination pad. | 308 |
| DEEP_SOUND_CHANNEL | The deepest <SOUND_CHANNEL> in an <OCEAN>. | 309 |
| DEEP_WATER_ROUTE | A <MARINE_ROUTE> through a deep <WATERBODY> plus related <NAVIGATION_MARK_FIXED>s and/or <NAVIGATION_MARK_AFLOAT>s; a deep water route. | 310 |
| DEFACTO_BOUNDARY | A <BOUNDARY> not officially recognized by various governments; a defacto boundary. | 311 |
| DEFENSIVE_POSITION | One or more <STRUCTURE>s constructed for the military defence of a <SITE> that are resistant to <MUNITION>s; a defensive position. | 312 |
| DEFENSIVE_POSITION_DEFILADE | A <TERRAIN_SURFACE_REGION> affording protection or shielding from hostile ground observation and flat projecting fire; the protection is provided by a <TERRAIN_OBSTACLE> (for example: a <DEFENSIVE_POSITION>, a <HILL>, and/or a <PARAPET>); a defensive position defilade. | 313 |
| DEFINED_WATER | A <REGION> plus related <NAVIGATION_MARK_FIXED>s and/or <NAVIGATION_MARK_AFLOAT>s of a <WATERBODY> delimited for the purposes of: defining <MARINE_ROUTE>s; communicating port signals or communicating firing practice signals; or serving as a <WAYPOINT>, <CALLING_IN_POINT>, or an <ANCHORAGE>; defined water. | 314 |
| DEMILITARIZED_ZONE | A <REGION> where military activity is prohibited; a demilitarized zone. | 315 |
| DEPOT | A <RAILWAY_STATION> or <BUS_STATION>, usually with an attached <WAREHOUSE>; a depot. | 316 |
| DEPTH_CONTOUR_LINE | An <ISOPLETH> of constant depth at and below a <SURFACE_DATUM>; a depth contour. | 317 |
| DEPTH_CURVE | A navigational safety <LINE> indicating that no <SOUNDING> of a lesser depth exists seaward of the <LINE>, but greater depths may occur on the shallow side of the <LINE>; a depth curve. | 318 |
| DEPTH_REGION | A <WATERBODY_REGION> containing <SOUNDING>s within a defined range of values permanently at or below a reference <SURFACE_DATUM>; a depth region. | 319 |
| DESCRIBED_POINT | A <LOCATION> at which text pertaining to that <LOCATION> is annotated; a described point. | 320 |
| DESERT_REGION | A dry, often sandy, <TRACT> of little rainfall, extreme <<AIR_TEMPERATURE>>s, and sparse <VEGETATION>; a desert region [AHD, "desert", 1.a]. | 321 |
| DESTROYER | A fast, highly maneuverable <WATER_SURFACE_VESSEL> armed with guns, torpedoes, and depth charges; a destroyer [AHD, "destroyer", 2]. | 322 |
| DETENTION_FACILITY | A <FACILITY> for the confinement of <HUMAN>s in lawful detention who are convicted or accused of crimes; a detention facility. | 323 |
| DEVICE | An <OBJECT> designed for a particular function or adapted for a particular purpose, especially a (simple) mechanical contrivance; a device [SOED, "device", 3]. | 324 |
| DIAGNOSTIC_POINT | A <LOCATION> used to check the accuracy of a <SYSTEM>; a diagnostic point. | 325 |
| DIAMOND_DUST | <SOLID_PRECIPITATION> that falls from a clear sky in very small crystals of <ICE>, often so tiny that they appear to be suspended in the <AIR>; diamond dust. | 326 |
| DIPLOMATIC_BUILDING | A <BUILDING> that houses and/or supports the activities of an ambassador; a diplomatic building. | 327 |
| DIRECTION | A direction in relation to a <LOCATION>. EXAMPLES Course, bearing. |
328 |
| DIRIGIBLE | A steerable and self-propelled <AIRSHIP> with a rigid, elongated frame; a dirigible. | 329 |
| DISCOLOURED_WATER | A <WATERBODY_REGION> having a colour distinctly different from that of the surrounding <REGION>; discoloured water. | 330 |
| DISH_AERIAL | A concave-shaped <AERIAL> that is used for transmitting and/or receiving electronic signals; a dish aerial. | 331 |
| DISPLAY_LIGHT | A specially constructed <LIGHT> that illuminates <DISPLAY_SIGN>s or other <STRUCTURE>s; a display light. | 332 |
| DISPLAY_SIGN | An upright panel or similar <STRUCTURE> used to convey visual information; a display sign. | 333 |
| DISPOSAL_SITE | A <SITE> for the collection and/or deposition of refuse or discarded <MATERIAL>; a disposal site. | 334 |
| DISTANCE_MARK | A <MARKER> that indicates the value of distance measured from a starting <LOCATION> and consists of either a solid visible <STRUCTURE> or a distinct <LOCATION> without a special installation; a distance mark. | 335 |
| DISTANCE_POST | A <MARKER> that designates the distance from a given <LOCATION>; a distance post. | 336 |
| DISTURBED_SOIL | <LAND> so disturbed as to have no identifiable type of <SOIL>; disturbed soil. | 337 |
| DOCK | The space between two <PIER>s; a dock or a slip. | 338 |
| DOOR | A hinged or sliding <BARRIER> to the ingress into or egress from a <COMPONENT> of a <STRUCTURE> or <VEHICLE>; a door [SOED, "door", 1.a]. | 339 |
| DORMITORY | A <BUILDING> used to house <CIVILIAN_PERSONNEL> that is typically large, unadorned, and intended for relatively temporary occupancy; a dormitory. | 340 |
| DRAGLINE | Excavating <EQUIPMENT> consisting of a steel scoop that swings on <CHAIN>s from a movable jib; the scoop is cast into the <MATERIAL> to be excavated and dragged back to the jib where it is lifted and dumped; a dragline. | 341 |
| DRAGON_TEETH | A <NON_EMPTY_SET> of regularly spaced concrete or metal <TERRAIN_OBSTACLE>s laid in single or multiple rows to prevent the movement of <GROUND_VEHICLE>s; dragon's teeth or dragon teeth. | 342 |
| DREDGE | <EQUIPMENT> for collecting and bringing up <OBJECT>s or <MATERIAL> from a <WATERBODY_FLOOR> by dragging or scooping; a dredge [SOED, "dredge", 2]. | 343 |
| DRILLING_RIG | A <STRUCTURE> that enables <EQUIPMENT> (for example: a drill and/or instrumentation) to create a hole or to be deployed in a hole in the <TERRAIN>; a drilling rig. | 344 |
| DRILLING_RIG_SUPERSTRUCTURE | The <SUPERSTRUCTURE> of a <DRILLING_RIG> that includes a <TOWER>, drill floor, and associated <EQUIPMENT>, including <LOAD_CABLE>s, pulleys, motors, and compressors. | 345 |
| DRINKING_TROUGH | A man-made open <CONTAINER> holding <WATER> for drinking by <NON_HUMAN_ANIMAL>s; a drinking trough. | 346 |
| DRIVE_IN_THEATRE | A <RECREATIONAL_FACILITY> where motion pictures are shown on <DRIVE_IN_THEATRE_SCREEN>s while viewers remain in their <GROUND_VEHICLE>s; a drive in theatre. | 347 |
| DRIVE_IN_THEATRE_SCREEN | A large outdoor screen <STRUCTURE> for showing motion pictures; a drive in theatre screen. | 348 |
| DRIVEWAY | A private <ROAD> alongside, in front of, or leading to a <BUILDING> (for example: a <HOUSE> and/or a <PARKING_GARAGE>); a driveway [SOED, "driveway"]. | 349 |
| DRIZZLE | Fairly uniform <PRECIPITATION> in very fine droplets (<<OUTSIDE_DIAMETER>> less than 0,5 millimetres) that are located very close to one another and are falling from a <CLOUD>; drizzle or mist. | 350 |
| DROP_GATE | A massive assemblage of <MATERIAL> (for example: concrete blocks and/or concrete cylinders) that is positioned above a <LAND_TRANSPORTATION_ROUTE> and is ready to be activated when needed as a potential <BARRIER> to an advancing enemy ground force; a drop gate. | 351 |
| DROVE | A wide <TRAIL> created by the regular movement of herds of <NON_HUMAN_ANIMAL>s; a drove. | 352 |
| DRY_DOCK | An artificial <WATERBODY_SHELTER_BASIN> fitted with a <MARINE_GATE> or <CAISSON> into which <VESSEL>s can be floated and the <WATER> pumped out to expose the bottom of the <VESSEL>; a dry dock or graving dock. | 353 |
| DRY_LAKE | A nearly level <TRACT> at the bottom of an undrained <GEOGRAPHIC_BASIN> in a <DESERT_REGION>, sometimes temporarily covered with <WATER>; a dry lake. | 354 |
| DRY_LAND | A <TRACT> neither permanently nor temporarily covered by <WATER>; dry land. | 355 |
| DUST | Solid <MATERIAL>s (for example: <SOIL>) in a minute and fine state of subdivision, so that the <PARTICLE>s are small and light enough to be easily raised and carried by the <WIND>; dust [SOED, "dust", 1]. | 356 |
| DUST_SUSPENSION | A <NON_AQUEOUS_CLOUD>, <PLUME>, and/or <PUFF> composed of`<DUST>; a dust suspension. | 357 |
| DWELLING | A <SHELTER> (for example: a <BUILDING>) used for living quarters; a dwelling. | 358 |
| DYKE | An artificial <EMBANKMENT> to contain <WATER>; a dyke. | 359 |
| DYKE_TOP | The top of a <DYKE>. | 360 |
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