Table 5.9 -- EDCS classifications whose label begins with E
| Label | Definition | Code |
| EARLY_WARNING_RADAR_SITE | A <SITE> utilizing long-range radar to detect approaching <AIRCRAFT> or <MISSILE>s; an early warning radar site. | 350 |
| EARTH | The primary <PLANET> of the <SUN> that is third in distance from the <SUN>, with an orbital mean <<RADIUS>> of approximately 149,6 million kilometres; Earth. | 351 |
| EDDY | A circular movement of fluid running contrary to the main flow, usually formed where <CURRENT>s pass obstructions, between two adjacent <CURRENT>s flowing counter to each other, or along the edge of a <CURRENT> that is <<PERMANENT>>; an eddy. | 352 |
| EDDY_REGION | A <REGION> where <EDDY>s occur. | 353 |
| ELECTRICAL_CABLE | An insulated <WIRE> or group of <WIRE>s formed into one continuous strand for the purpose of transmitting electrical power or signals; an electrical cable. | 354 |
| ELECTRICAL_SIGNAL_LINE | A <SYSTEM> of <WIRE>s and their supports above the <TERRAIN> that transmit electrical signals over distance; an electrical signal line. Examples: a telegraph line and a telephone line. | 355 |
| ELECTRICAL_SIGNAL_LINE_PYLON | A <PYLON> or <POLE_STRUCTURE> used to support an <ELECTRICAL_SIGNAL_LINE>. | 356 |
| ELECTRIFIED_RAILWAY_PYLON | A <PYLON> or <POLE_STRUCTURE> used to support a <POWER_TRANSMISSION_LINE> associated with an electrified <RAILWAY>. | 357 |
| ELECTROMAGNETIC_MATERIAL- _PROPERTY_SET |
A <PROPERTY_SET> describing the electromagnetic properties of the <MATERIAL>s composing an <OBJECT>. | 358 |
| ELECTROMAGNETIC_REFRACTIVE- _EVAPORATIVE_DUCT |
A layer of the <ATMOSPHERE> over a <WATER_BODY>, in which electromagnetic waves launched in certain <DIRECTION>s are guided by or trapped within the layer rather than propagating radially from their source, caused by a decrease in <<ABSOLUTE_HUMIDITY>> with <<HEIGHT_AGL>> due to evaporation; a refractive evaporative duct. | 359 |
| ELEVATED_ELECTRICAL_CABLE | An <ELECTRICAL_CABLE> located above a <PLANETARY_SURFACE>. | 360 |
| ELEVATION_CONTOUR_LINE | An <ISOPLETH> of constant elevation value with respect to a <SURFACE_DATUM>; an elevation contour line. | 361 |
| EM_PULSE_COMPTON_RECOIL | The electromagnetic radiation from a nuclear explosion caused by Compton-recoil electrons and photoelectrons from photons scattered in the <MATERIAL>s of the nuclear <DEVICE> or in a surrounding medium. The resulting electric and <MAGNETIC_FIELD>s may couple with electrical and/or electronic <SYSTEM>s to produce damaging current and voltage surges. May also be caused by non-nuclear means. | 362 |
| EMBANKMENT | A long, raised mound of <SOIL>, <ROCK>, or other <MATERIAL>s in the <TERRAIN>, which is often used to support a <TERRAIN_TRANSPORTATION_ROUTE>; an embankment. | 363 |
| EMBASSY | A <BUILDING> housing the office of an ambassador or the ambassador's staff; an embassy. | 364 |
| EMBASSY_COMPOUND | An enclosed <SITE> containing an <EMBASSY>; an embassy compound. | 365 |
| ENGINE_TEST_CELL | A <STRUCTURE> where engines are tested; an engine test cell. | 366 |
| ENGINEER_BRIDGE | A temporary <BRIDGE> spanning and providing passage over a <TERRAIN_OBSTACLE> (for example: a <WATER_BODY> or a declivity); an engineer bridge. | 367 |
| ENGINEER_DITCH | A <TRENCH> that is constructed to bury <PIPELINE>s, <ELECTRICAL_SIGNAL_LINE>s, or <POWER_TRANSMISSION_LINE>s; an engineer ditch. | 368 |
| ENGINEER_TRENCH | An engineered <TRENCH> or combination <TRENCH> and <PARAPET>, usually placed to turn, slow, or stop the movement of <MOTOR_VEHICLE>s; an engineer trench. | 369 |
| EQUIPMENT | <OBJECT>s used or required for a particular purpose; equipment or apparatus. | 370 |
| EQUIPMENT_COMPONENT | A <COMPONENT> of an <EQUIPMENT>. | 371 |
| ESCALATOR | <EQUIPMENT> consisting of a moving <STAIR> made on the endless-chain principle, so that the steps ascend or descend continuously, for carrying <HUMAN>s up or down; an escalator. | 372 |
| ESCARPMENT | A steep, vertical, or overhanging face of <ROCK> or <SOIL> in the <LAND>; an escarpment. | 373 |
| ESKER | A long, narrow <RIDGE> of <SAND> and gravel deposited by a glacial <RIVER>; an esker. | 374 |
| ESTUARY | An arm of a <WATER_BODY> that extends inland to meet the mouth of a <RIVER> and includes a mixture of fresh and salt <WATER>; an estuary. | 375 |
| EXCAVATING_MACHINE | <EQUIPMENT> for removing <SOIL> or <MATERIAL>s from the <TERRAIN>; an excavating machine. | 376 |
| EXCAVATION | An excavated space in the <TERRAIN>; an excavation, a cavity or a hollow. | 377 |
| EXHIBITION_GROUND | A <SITE> where permanent <STRUCTURE>s exist to hold outdoor exhibitions; an exhibition ground. | 378 |
| EXPLOSIVE_CHARGE | An explosive <DEVICE> that may be detonated to either damage or destroy <STRUCTURE>s or to move <ROCK>, <SOIL>, or other <MATERIAL>s; an explosive charge. | 379 |
| EXPLOSIVE_LAND_MINE | An <EXPLOSIVE_MINE> used in land warfare. | 380 |
| EXPLOSIVE_MINE | An explosive <DEVICE> located on or below a <PLANETARY_SURFACE>, usually emplaced for military purposes; an explosive mine. | 381 |
| EXPLOSIVE_NAVAL_MINE | An <EXPLOSIVE_MINE> used in naval warfare. | 382 |
| EXPOSED_BEDROCK | A <TERRAIN_SURFACE_REGION> consisting principally of <BEDROCK> that is covered by less than 10 percent loose <MATERIAL> (for example: <SOIL>, <SAND>, clay, or gravel); exposed bedrock. | 383 |
| EXTERIOR_HALLWAY | A <HALLWAY> along the exterior of a <BUILDING>, often appearing as a long <BALCONY>. | 384 |
| EXTERIOR_WALL | A <WALL> forming an exterior section of a <STRUCTURE>. | 385 |
| EXTRACTION_FACILITY | A <FACILITY> for extracting and/or exploiting natural resources; an extraction facility. | 386 |
| EXTRACTION_MINE | An <EXCAVATION> made in the <TERRAIN> for the purpose of extracting and/or exploiting natural resources; an extraction mine. | 387 |
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