Table 6.50 — EEs for EAs whose label begins with O
| Attribute label | Enumerant label | Concept definition | Code |
| OBJECT_ASPECT | The portion or aspect of an <OBJECT> in relation to the <TERRAIN>. | ||
| BODY | Body. | 1 | |
| CUT | <MATERIAL>s remaining after partial removal to depress the base of a <OBJECT> below the level of the surrounding <LAND>; cut. | 2 | |
| CUT_TRANSITION | <<<CUT>>> transition. | 3 | |
| EMBANK | <MATERIAL> used to elevate the base of an <OBJECT> above the level of the surrounding land; embankment. | 4 | |
| EMBANK_OR_CUT_TRANSITION | <<<EMBANK>>>s and/or <<<CUT>>>s transition <REGION>s. | 5 | |
| EMBANK_TRANSITION | <<<EMBANK>>> transition. | 6 | |
| LEFT_CUT | <<<CUT>>> located to the left side of the <DIRECTION> of travel. | 7 | |
| LEFT_CUT_TRANSITION | <<<LEFT_CUT>>> transition. | 8 | |
| LEFT_EMBANK | <<<EMBANK>>> located to the left side of the <DIRECTION> of travel or flow. | 9 | |
| LEFT_EMBANK_OR_CUT_TRANSITION | <<<LEFT_EMBANK>>> and/or <<<LEFT_CUT>>> transition <REGION>s. | 10 | |
| LEFT_EMBANK_TRANSITION | <<<LEFT_EMBANK>>> transition. | 11 | |
| LEFT_SHOULDER | <<<SHOULDER>>> located to the left side of the <DIRECTION> of travel or flow. | 12 | |
| RIGHT_CUT | <<<CUT>>> located to the right side of the <DIRECTION> of travel or flow. | 13 | |
| RIGHT_CUT_TRANSITION | <<<RIGHT_CUT>>> transition. | 14 | |
| RIGHT_EMBANK | <<<EMBANK>>> located to the right side of the <DIRECTION> of travel or flow. | 15 | |
| RIGHT_EMBANK_OR_CUT_TRANSITION | <<<RIGHT_EMBANK>>> and/or <<<RIGHT_CUT>>> transition <REGION>s. | 16 | |
| RIGHT_EMBANK_TRANSITION | <<<RIGHT_EMBANK>>> transition. | 17 | |
| RIGHT_SHOULDER | <<<SHOULDER>>> located to the right side of the <DIRECTION> of travel or flow. | 18 | |
| SHOULDER | Stopping strip along a travel way, typically gravel covered; shoulder. | 19 | |
| OBJECT_CONFIGURATION | The type of configuration of an <OBJECT>. | ||
| DISPERSED | The <OBJECT> consists of multiple <COMPONENT>s that are dispersed. | 1 | |
| DIVIDED_DIFFERENT_WIDTHS | The <OBJECT> is divided into multiple <COMPONENT>s that have different <<WIDTH>>s. | 2 | |
| DIVIDED_SAME_WIDTH | The <OBJECT> is divided into multiple <COMPONENT>s that have the same <<WIDTH>>. | 3 | |
| DOUBLE | Double. | 4 | |
| INCLINED | The <OBJECT> is inclined from either the horizontal or the vertical. | 5 | |
| JUXTAPOSITION | The <OBJECT> consists of multiple <COMPONENT>s that are are juxtaposed with respect to one another. | 6 | |
| NON_DIVIDED | The <OBJECT> is not divided into distinct, spatial separated <COMPONENT>s. | 7 | |
| SINGLE | Single. | 8 | |
| OBJECT_ORDINAL_RANK | The relative importance of an <OBJECT> as an ordinal rank. | ||
| FIRST | Primary or first order. | 1 | |
| SECOND | Secondary or second order. | 2 | |
| THIRD | Tertiary or third order. | 3 | |
| FOURTH | Quaternary or fourth order. | 4 | |
| FIFTH | Quintary or fifth order. | 5 | |
|
OBJECT_ORIENTATION_WRT- _VERTICAL |
The orientation of the usual axis of an <OBJECT> with respect to the vertical <DIRECTION>. | ||
| HORIZONTAL | Perpendicular to the vertical. | 1 | |
| INVERTED | Inverted. | 2 | |
| LEANING | Leaning. | 3 | |
| ON_SIDE | On side. | 4 | |
| UPRIGHT | Upright. | 5 | |
| OBJECT_POLYGONAL_FACE_SHAPE | The shape of the polygon associated with a <NON_EMPTY_SET> of <POLYGONAL_FACE>s of an <OBJECT>. | ||
| EQUILATERAL_TRIANGLE | Equilateral triangle. | 1 | |
| HEXAGON | Hexagon. | 2 | |
| OCTAGON | Octagon. | 3 | |
| PENTAGON | Pentagon. | 4 | |
| RECTANGLE | Rectangle. | 5 | |
| RIGHT_ISOSCELES_TRIANGLE | Right isosceles triangle. | 6 | |
| RIGHT_TRIANGLE | Right triangle. | 7 | |
| SQUARE | Square. | 8 | |
| TRIANGLE | Triangle. | 9 | |
| OBJECT_SET_TYPE | The type of an <OBJECT_SET>. | ||
| AERONAUTICAL | Related to <AIRCRAFT>, <AERODROME>s, and other aeronautical activities. | 1 | |
| AERONAUTICAL_OBSTRUCTION | Vertical obstructions to aeronautical navigation. | 2 | |
| AID_TO_NAVIGATION | Related to <AID_TO_NAVIGATION>s. | 3 | |
| AIRSPACE | Related to <AIRSPACE>s. | 4 | |
| ATS_ROUTE | Related to <ATS_ROUTE>s. | 5 | |
| BEACH | Related to <BEACH>s. | 6 | |
| BOUNDARY | Related to political or geographic <BOUNDARY>s. | 7 | |
| COASTLINE | Related to <COASTLINE>s, international <BOUNDARY>s, and major <MARINE_PORT>s. | 8 | |
| CULTURAL_LANDMARK | Related to cultural landmarks. | 9 | |
| DATA_QUALITY | Related to <DATA_QUALITY_BOUNDARY>s and <DATA_QUALITY_REGION>s. | 10 | |
| DATABASE_BOUNDARY | Related to the <BOUNDARY>s of data libraries and databases. | 11 | |
| DEMARCATION | Related to <LINE>s and <REGION>s of demarcation, which have been defined for administrative, political, military, or other purposes. | 12 | |
| ELEVATION | Related to the relief or <<ELEVATION>> of the <TERRAIN>. | 13 | |
| FIXED_UNDERWATER_OBJECT | Related to fixed <UNDERWATER_OBJECT>s. | 14 | |
| GROUND_OBSTACLE | <OBJECT>s on, or in, the <TERRAIN> that act as <TERRAIN_OBSTACLE>s to the movement of <GROUND_VEHICLE>s. | 15 | |
| HYDRO | Hydrographic <OBJECT>s, including <WATERBODY_FLOOR> characteristics, of significance to marine navigation. | 16 | |
| HYDRO_AID_TO_NAVIGATION | Related to <MARINE_AID_TO_NAVIGATION>s. | 17 | |
| HYDRO_DANGER | Offshore hydrographic<OBJECT>s, generally underwater, which constitute a danger to the movement of <VESSEL>s. | 18 | |
| HYDRO_LIMITS | <LINE>s and <REGION>s of demarcation that have been defined for the purpose of controlling marine traffic; hydrographic limits. | 19 | |
| HYPSOGRAPHY | Related to the <TERRAIN> that directly depict <<TERRAIN_ELEVATION>> information, including <CONTOUR>s and <SPOT_ELEVATION>s; relief or hypsography. | 20 | |
| INDUSTRY | Man-made and related to the commercial production and sale of goods and services. | 21 | |
| INLAND_WATER | Related to <INLAND_WATER> and associated <STRUCTURE>s. | 22 | |
| LAND_COVER | Related to the <TERRAIN>, including agricultural and extraction activities, and related <SURFACE> characteristics; land use or cover. | 23 | |
| MARINE_ENVIRONMENT | Environmental characteristics relating to <WATERBODY_CURRENT>s, <TIDE>s, and anomalies of significance to marine navigation; marine limit. | 24 | |
| MARINE_LIMIT | <BOUNDARY>s of <WATERBODY>s of significance to marine operations. | 25 | |
| MARINE_NAVIGATION | Topographic and hydrographic <OBJECT>s including <SHORELINE>s, <ISLAND>s and <BOUNDARY>s of significance to marine navigation. | 26 | |
| MARINE_OBSTRUCTION | Related to wrecks, offshore installations and obstructions of significance to marine navigation. | 27 | |
| MARINE_OVERVIEW | Provide a generalized representation of a <MARINE_REGION>; marine overview. | 28 | |
| MARINE_SHORE | Related to the <SHORE>, including <GLACIER>s, <TREE>s, <SWAMP>s and <MARSH>s of significance to marine navigation. | 29 | |
| MILITARY_AIRSPACE | Vertical and lateral defined <AIRSPACE>s established for conducting military training and aerial refuelling. | 30 | |
| MILITARY_STRUCTURE | Related to <STRUCTURE>s originally built for defensive purposes, although not necessarily still in use for such purposes; military structure. | 31 | |
| OCEAN_ENVIRONMENT | Describing the physical characteristics of the <OCEAN> (and littoral) volume and floor. | 32 | |
| OCEAN_FLOOR | Related to the <OCEAN_FLOOR> and <WATERBODY_FLOOR_TOPOGRAPHIC_CONFIGURATION>s. | 33 | |
| OVERVIEW | Providing a generalized representation of a <REGION>; overview. | 34 | |
| PHYSIOGRAPHY | Natural, exclusive of <INLAND_WATER>s, and comprising or laying upon the <TERRAIN> and its macro and micro relief; physiography. | 35 | |
| PLACE_NAME | Identifying significant named <LOCATION>s. | 36 | |
| PLANETARY_SCIENCE | Related to the physical processes and phenomena occurring in a <PLANET> and its vicinity; planetary science. | 37 | |
| POLITICAL_ENTITY | Identifying political entities and their <BOUNDARY>s. | 38 | |
| POPULATION | Man-made and used to house, employ, administrate, provide medical care, and entertain the populace of a <REGION>; population. | 39 | |
| PORT_AND_HARBOUR | Related to <MARINE_PORT>s and <HARBOUR>s, including their associated anchorage, docking and related cultural <FACILITY>s. | 40 | |
| RAILWAY | Related to <RAILWAY>s. | 41 | |
| ROAD | Related to <ROAD>s. | 42 | |
| SHORE_STRUCTURE | Hydrographic <OBJECT>s including <BREAKWATER>s, <PIER>s and <SHORE_PROTECTION_STRUCTURE>s of significance to marine navigation. | 43 | |
| TERMINAL_PROCEDURE | Related to predetermined <AIRCRAFT> maneuvers in the vicinity of an <AERODROME> to orderly transition <AIRCRAFT> from take-off to the enroute phase of flight, or from the enroute to terminal phase of flight. | 44 | |
| TERRAIN_COMPOSITION | Related to the composition of the <TERRAIN>. | 45 | |
| TERRAIN_CONFIGURATION | Related to the slope or configuration of the <TERRAIN>. | 46 | |
| TERRAIN_TRANSPORTATION_ROUTE | Related to <LAND_TRANSPORTATION_ROUTE>s. | 47 | |
| TILE_SET | Defining a <NON_EMPTY_SET> of rectangular subdivisions of a <REGION>; tiles. | 48 | |
| TRACK_SWATH | Related to <TRACK_SWATH>s. | 49 | |
| UNDERWATER_OBJECT | Related to <UNDERWATER_OBJECT>s. | 50 | |
| UTILITY |
Related to the infrastructure of a <REGION>, and used to deliver utility services into the homes and businesses of the populace. EXAMPLES Electric power, natural gas, oil, water, sewerage, telephone, telecommunications. |
51 | |
| VEGETATION | Related to <VEGETATION>. | 52 | |
| WATER_BODY_BATHYMETRY | Related to relief or <<ELEVATION>> of a <WATERBODY_FLOOR>. | 53 | |
| OBSCURANT_TYPE | The type of obscurant present in an <ATMOSPHERE>. | ||
| ADVECTION_FOG | <FOG> caused by advection of moist <AIR> over a cold <PLANETARY_SURFACE>; advection fog. | 1 | |
| BLOWING_SNOW | <SNOW_GROUND_COVER> lifted over the <PLANETARY_SURFACE> by <WIND> to a height of 2 metres or more; blowing snow. | 2 | |
| DESERT_HAZE | Desert <<<HAZE>>>. | 3 | |
| DESERT_SUMMER | Desert summer. | 4 | |
| DESERT_WINTER | Desert winter. | 5 | |
| DUSTSTORM | An unusual, frequently severe, condition characterized by strong <WIND>s and <DUST_SUSPENSION> over an extensive <REGION>; a dust storm. | 6 | |
| HAZE | Suspension in the <ATMOSPHERE> of extremely small, dry <PARTICLE>s that are invisible to the naked eye but numerous enough to give the sky an opalescent appearance; haze. | 7 | |
| MARINE_HAZE | <<<HAZE>>> consisting of salt <PARTICLE>s; marine haze. | 8 | |
| NONE_PRESENT | No obscurant conditions are present. | 9 | |
| RADIATION_FOG | <FOG> produced over a <TRACT> when radiational cooling reduces the <<AIR_TEMPERATURE>> to or below its dew point; radiation fog. | 10 | |
| RURAL_HAZE | Rural <<<HAZE>>>. | 11 | |
| SNOW | Obscuration caused by the presence of <SNOW_PRECIPITATION> suspended in the <ATMOSPHERE>. | 12 | |
| TEMPERATE_SUMMER_DAY | A condition present during the summer and dependent on the <<TEMPERATURE>> during the day; temperate summer day. | 13 | |
| TEMPERATE_SUMMER_NIGHT | A condition present during the summer and dependent on the <<TEMPERATURE>> during the night; temperate summer night. | 14 | |
| TEMPERATE_WINTER | A condition present during winter season and dependent on the <<TEMPERATURE>> at the time; temperate winter. | 15 | |
| TROPOSPHERIC | <<<HAZE>>> in the <TROPOSPHERE>. | 16 | |
| URBAN_HAZE | <<<HAZE>>> caused by or present in urban environments. | 17 | |
| OBSERVATION_PLATFORM_TYPE | The type of an observation platform. | ||
| AIRCRAFT | <AIRCRAFT>. | 1 | |
| BUOY | <BUOY>. | 2 | |
| FIXED_WEATHER_STATION | Fixed weather station. | 3 | |
| GEOPHYSICAL_SATELLITE | Geophysical <ARTIFICIAL_SATELLITE>. | 4 | |
| HUMAN | <HUMAN>. | 5 | |
| METEOROLOGIC_OBSERVATION_TOWER | Meteorological observation <TOWER>. | 6 | |
| MOTOR_VEHICLE | <MOTOR_VEHICLE>. | 7 | |
| VESSEL | <VESSEL>. | 8 | |
|
OBSERVED_VISIBILITY_REPORT- _TYPE |
The type of report of observed visibility. | ||
| MINIMUM | Minimum observed visibility during reporting period. | 1 | |
| PRVL | The visibility that is considered representative of visibility conditions at the station; the greatest distance that can be seen throughout at least half the horizon circle, not necessarily continuous; prevailing. | 2 | |
| PRVL_VAR_HIGH | The maximum visibility reported if the prevailing visibility rapidly increases and decreases by 800 metres (approximately 0,5 miles) or more, during the time of observation, and the visibility is less than 4 828 metres (approximately 3 miles); prevailing variable high. | 3 | |
| PRVL_VAR_LOW | The minimum visibility reported if the prevailing visibility rapidly increases and decreases by 800 metres (approximately 0,5 miles) or more, during the time of observation, and the visibility is less than 4 828 metres (approximately 3 miles); prevailing variable low. | 4 | |
| SECTOR | The visibility in a specific <DIRECTION> that represents at least a 45 arc degree sector of the horizon circle. | 5 | |
| TOWER | The prevailing visibility determined from airport traffic <CONTROL_TOWER> at stations that also report surface-level visibility. | 6 | |
| TOWER_VAR_HIGH | The maximum visibility reported if the airport traffic <CONTROL_TOWER> visibility rapidly increases and decreases by 800 metres (approximately 0,5 miles) or more, during the time of observation and the visibility is less than 4 828 metres (approximately 3 miles); control tower prevailing high. | 7 | |
| TOWER_VAR_LOW | The minimum visibility reported if the airport traffic <CONTROL_TOWER> visibility rapidly increases and decreases by 800 metres (approximately 0,5 miles) or more, during the time of observation and the visibility is less than 4 828 metres (approximately 3 miles); control tower prevailing low. | 8 | |
| OCEAN_FLOOR_REGION_NAME_TYPE | The type of a named <REGION> of the <OCEAN_FLOOR> that has measurable relief or is delimited by relief. | ||
| ABYSSAL_HILLS | A <WATERBODY_FLOOR_REGION> of small elevations in an <ABYSS>; abyssal hills. | 1 | |
| ABYSSAL_PLAIN | A <<<PLAIN>>> in an <ABYSS>; an abyssal plain. | 2 | |
| APRON | A gently dipping <SURFACE>, underlain primarily by <SEDIMENT>, at the base of any steeper slope; an apron. | 3 | |
| ARCHIPELAGIC_APRON | A gentle slope with a generally smooth <SURFACE>, characteristically found around groups of <ISLAND>s or <<<SEAMOUNT>>>s; an archipelagic apron. | 4 | |
| BANK | An elevation over which the <<WATER_DEPTH>> is relatively shallow, but sufficient for safe navigation on the <WATERBODY_SURFACE>; a bank. | 5 | |
| BANK_SET | A <NON_EMPTY_SET> of <<<BANK>>>s in close proximity. | 6 | |
| BASIN | <OCEAN_BASIN>. | 7 | |
| BORDERLAND | A <WATERBODY_FLOOR_REGION> adjacent to a continent, normally occupied by or bordering a <<<CNTNTL_SHELF>>>, and sometimes emerging as <ISLAND>s that are irregular or blocky in plan or profile, with <<WATER_DEPTH>>s well in excess of those typical of a <<<CNTNTL_SHELF>>>; a borderland. | 8 | |
| CALDERA | A collapsed or partially-collapsed <<<SEAMOUNT>>>, commonly of annular shape; a caldera. | 9 | |
| CANYON | <WATERBODY_FLOOR_CANYON>. | 10 | |
| CANYON_SET | A <NON_EMPTY_SET> of <<<CANYON>>>s, in close proximity. | 11 | |
| CAP | A localized elevation, over which the <<WATER_DEPTH>> is relatively shallow, but sufficient for safe navigation on the <WATERBODY_SURFACE>; a cap. | 12 | |
| CNTNTL_MARGIN | The <<<ZONE>>>, generally consisting of a <<<CNTNTL_SHELF>>>, <<<CNTNTL_SLOPE>>> and <<<CNTNTL_RISE>>>, separating a continent from the deep <OCEAN_FLOOR> or <<<ABYSSAL_PLAIN>>>; a continental margin. Occasionally a <<<TRENCH>>> may be present in place of a <<<CNTNTL_RISE>>>. | 13 | |
| CNTNTL_RISE | A gentle slope rising from the <OCEAN> depths towards the foot of a <<<CNTNTL_SLOPE>>>; a continental rise. | 14 | |
| CNTNTL_SHELF | A <<<SHELF>>> adjacent to a continent. | 15 | |
| CNTNTL_SLOPE | The deepening <OCEAN_FLOOR> out from the <<<SHELF_EDGE>>> of a <<<CNTNTL_SHELF>>> to the upper <BOUNDARY> of the <<<CNTNTL_RISE>>>, or the <LOCATION> where there is a general decrease in steepness; a continental slope. | 16 | |
| DEEP | An extensive <REGION> of the <OCEAN_FLOOR> having great <<WATER_DEPTH>>, generally greater than 6 000 metres. | 17 | |
| ESCARPMENT | An elongated, characteristically linear, steep slope separating horizontal or gently sloping sectors of the <OCEAN_FLOOR> in non-shelf <WATERBODY_FLOOR_REGION>s; an escarpment or scarp. | 18 | |
| FAN | A relatively smooth, fan-like, depositional <WATERBODY_FLOOR_TOPOGRAPHIC_CONFIGURATION> normally sloping away from the outer termination of a <<<CANYON>>>, or <SYSTEM> of <<<CANYON>>>s; a fan or cone. | 19 | |
| FRACTURE_ZONE | An extensive linear <<<ZONE>>> of irregular topography, mountainous or faulted, characterized by steep-sided or asymmetrical <<<RIDGE>>>s, clefts, <<<TROUGH>>>s, or <<<ESCARPMENT>>>s; a fracture zone. | 20 | |
| GUYOT | A <<<SEAMOUNT>>> having a comparatively smooth flat top; a guyot or tablemount. | 21 | |
| GUYOT_SET | A <NON_EMPTY_SET> of <<<GUYOT>>>s in close proximity. | 22 | |
| HILL | An isolated elevation, smaller than a <<<SEAMOUNT>>>; a hill. | 23 | |
| HILL_SET | A <NON_EMPTY_SET> of <<<HILL>>>s in close proximity. | 24 | |
| HOLE | A small local <TERRAIN_DEPRESSION>, often steep-sided; a hole. | 25 | |
| KNOLL | An elevation somewhat smaller than a <<<SEAMOUNT>>> and of rounded profile, characteristically isolated or as a cluster on the <OCEAN_FLOOR>; a knoll. | 26 | |
| KNOLL_SET | A <NON_EMPTY_SET> of <<<KNOLL>>>s, clustered, in close proximity. | 27 | |
| LEVEE | A depositional natural embankment bordering a <<<CANYON>>>, <<<VALLEY>>>, or <<<SEA_CHANNEL>>>; a levee. | 28 | |
| MEDIAN_VALLEY | The axial <TERRAIN_DEPRESSION> of a <SYSTEM> of <MOUNTAIN>s forming part of a <<<MID_OCEANIC_RIDGE>>>; a median valley. | 29 | |
| MID_OCEANIC_RIDGE | The linked major mid-oceanic <SYSTEM>s of <MOUNTAIN>s, where such <SYSTEM>s are of global extent; a mid-oceanic ridge. | 30 | |
| MOAT | An annular <TERRAIN_DEPRESSION> that may not be continuous, located at the base of many isolated elevations (for example: <SEAMOUNT> and/or an <ISLAND>); a moat. | 31 | |
| MOUNTAIN_SET | A <NON_EMPTY_SET> of <MOUNTAIN>s, in close proximity. | 32 | |
| PASSAGE | A narrow break in a <<<RIDGE>>> or a <<<RISE>>>; a passage, pass, or gap. | 33 | |
| PEAK | A prominent elevation either pointed or of a very limited extent across the summit; a peak. | 34 | |
| PINNACLE | Any high tower or spire-shaped pillar of <ROCK> or <CORAL>, alone or cresting a summit; a pinnacle. | 35 | |
| PLAIN | An extensive, flat, gently sloping or nearly level <TERRAIN_PLAIN>. | 36 | |
| PLATEAU | A <PLATEAU>, one or more sides of which drop off abruptly. | 37 | |
| PROMONTORY | A major protrusion, resembling a <<<SPUR>>>, of the <<<CNTNTL_SLOPE>>> extending to the deep <OCEAN_FLOOR>; a promontory. Characteristically, the crest deepens seaward. | 38 | |
| PROVINCE | <WATERBODY_FLOOR_PROVINCE>. | 39 | |
| REEF | <REEF>. | 40 | |
| REEF_SET | A <NON_EMPTY_SET> of <<<REEF>>>s, in close proximity. | 41 | |
| RIDGE |
<WATERBODY_FLOOR_RIDGE>. EXAMPLE <<<MID_OCEANIC_RIDGE>>>. |
42 | |
| RIDGE_SET | A <NON_EMPTY_SET> of <<<RIDGE>>>s, in close proximity. | 43 | |
| RISE | A broad elevation that rises gently and generally smoothly from the <OCEAN_FLOOR>, generally including the <<<MID_OCEANIC_RIDGE>>>s; a rise. | 44 | |
| SADDLE | A broad pass or col, resembling in shape a riding saddle, in a <<<RIDGE>>> or between contiguous elevations. | 45 | |
| SEABIGHT | A crescent-shaped indentation in the <OCEAN_FLOOR> formed by <WATER_CURRENT>s; a seabight. | 46 | |
| SEA_CHANNEL | A continuously sloping <TERRAIN_CHANNEL> found in <<<FAN>>>s or <<<ABYSSAL_PLAIN>>>s and customarily bordered by <<<LEVEE>>>s on one or both sides; a channel or sea channel. | 47 | |
| SEAMOUNT | <SEAMOUNT>. | 48 | |
| SEAMOUNT_CHAIN | Several <<<SEAMOUNT>>>s in linear or arcuate alignment, with their bases clearly separated; a seamount chain. | 49 | |
| SEAMOUNT_GROUP | A distinct <NON_EMPTY_SET> of <SEAMOUNT>s, in close proximity to, but set off from, other <OCEAN_FLOOR> features; a seamount group. | 50 | |
| SEAMOUNT_PROVINCE | A <BATHYMETRIC_PROVINCE> of <<<SEAMOUNT>>>s. | 51 | |
| SEAMOUNT_SET | A <NON_EMPTY_SET> of <<<SEAMOUNT>>>s, in close proximity. | 52 | |
| SHELF | A <<<ZONE>>> adjacent to a continent (or around an <ISLAND>) and extending from the <LOW_WATER_LINE> to a depth at which there is usually a marked increase of slope towards the depths of the <OCEAN>; a shelf. | 53 | |
| SHELF_EDGE | The <LINE> along which there is marked increase of slope at the seaward margin of a <<<SHELF>>>; a shelf edge or shelf break. | 54 | |
| SHOAL | An <UNDERWATER_HAZARD> with substantially less clearance than the surrounding <WATERBODY_FLOOR_REGION> and composed of unconsolidated <MATERIAL>; a shoal. | 55 | |
| SHOAL_SET | A <NON_EMPTY_SET> of <<<SHOAL>>>s, in close proximity. | 56 | |
| SILL | A <BARRIER> of relatively shallow <<WATER_DEPTH>> restricting the movement of <WATER> between <<<BASIN>>>s; a sill. | 57 | |
| SLOPE | The deepening <OCEAN_FLOOR> out from a <<<SHELF_EDGE>>> to the upper limit of a <<<RISE>>>, or the <LOCATION> where there is a general decrease in steepness; a slope. | 58 | |
| SOUND | <MARINE_SOUND>. | 59 | |
| SPUR | A subordinate elevation or <RIDGE> protruding from a larger <WATERBODY_FLOOR_TOPOGRAPHIC_CONFIGURATION> (for example: a <<<PLATEAU>>> and/or the foundation of an <ISLAND>); a spur. | 60 | |
| TERRACE | A relatively flat horizontal or gently inclined <WATERBODY_FLOOR_REGION>, sometimes long and narrow, which is bounded by a steeper ascending slope on one side and by a steeper descending slope on the opposite side; a terrace. | 61 | |
| TRENCH | <WATERBODY_FLOOR_TRENCH>. | 62 | |
| TROUGH | A long <TERRAIN_DEPRESSION>, characteristically flat bottomed and steep-sided and normally shallower than a <<<TRENCH>>>; a trough. | 63 | |
| VALLEY | A relatively shallow, wide <TERRAIN_DEPRESSION>, the <WATERBODY_FLOOR> of which usually has a continuous gradient; a valley, submarine valley, or sea valley. This term is generally not used for <WATERBODY_FLOOR_TOPOGRAPHIC_CONFIGURATION>s that have characteristics of <<<CANYON>>>s for a significant portion of their extent. | 64 | |
| ZONE | An extensive linear <REGION> identifiable by a number of shared physiographic characteristics that are markedly in contrast with those in the surrounding <REGION>s; a zone. | 65 | |
| OCEAN_NAME | The name of an <OCEAN>. | ||
| ANTARCTIC | Antarctic Ocean, or Southern Ocean, as defined in [LOS, 10]. The limits of the Antarctic Ocean are the parallel of 60ºS to the north and the <COAST> of Antarctica, including the Antarctic Peninsula, to the south. | 1 | |
| ARCTIC | Arctic Ocean as defined in [LOS, 9]. The Arctic Ocean is situated round the North Pole. Its southern limit generally follows the northern <COAST>s of North America, Greenland, and Eurasia. | 2 | |
| ATLANTIC | <<<NORTH_ATLANTIC>>> plus <<<SOUTH_ATLANTIC>>> as defined in [LOS, 1 and 4]. | 3 | |
| INDIAN | Indian Ocean as defined in [LOS, 5]. The general limits of the Indian Ocean are the eastern <COAST> of Africa, the sourthen <COAST> of Asia, the western <COAST> of Australia, and the parallel of 60ºS to the south. | 4 | |
| NORTH_ATLANTIC | North <<<ATLANTIC>>> Ocean as defined in [LOS, 1]. The general limits of the North Atlantic Ocean are the eastern <COAST>s of South America and North America, the southern <COAST> of Greenland, the western <COAST>s of Europe and Africa, and the Equator. | 5 | |
| NORTH_PACIFIC | North <<<PACIFIC>>> Ocean as defined in [LOS, 7]. The general limits of the North Pacific Ocean are the eastern <COAST> of Asia, the western <COAST> of North America, and the Equator. | 6 | |
| PACIFIC | <<<NORTH_PACIFIC>>> plus <<<SOUTH_PACIFIC>>> as defined in [LOS, 7 and 8]. | 7 | |
| SOUTH_ATLANTIC | South <<<ATLANTIC>>> Ocean as defined in [LOS, 4]. The general limits of the South Atlantic Ocean are the eastern <COAST> of South America, the Equator, the western <COAST> of Africa, and the parallel of 60ºS to the south. | 8 | |
| SOUTH_CHINA | South China and Eastern Archipelagic Seas as defined in [LOS, 6]. The general limits of the South China and Eastern Archipelagic Seas are the eastern boundary of the Indian Ocean, the south-eastern <COAST> of Asia, and the western boundary of the Pacific Ocean. | 9 | |
| SOUTH_PACIFIC | South <<<PACIFIC>>> Ocean as defined in [LOS, 8]. The general limits of the South Pacific Ocean are the eastern <COAST>s of Australia, Irian Jaya and Papua New Guinea, the Equator, the western <COAST> of South AMerica, and the parallel of 60ºS to the south. | 10 | |
| OFFSHORE_PLATFORM_TYPE | The type of an offshore platform. | ||
| ACCOMMODATION | Used primarily for eating, sleeping and recreation purposes; accommodation. | 1 | |
| ARTICULATED_LOADING | A metal lattice <TOWER>, buoyant at one end and attached at the other by a universal joint to a concrete filled base on the <OCEAN_FLOOR>; an articulated loading platform (ALP). | 2 | |
| ARTIFICIAL_ISLAND | An artificial <STRUCTURE> usually constructed for the exploration or exploitation of marine resources, marine scientific research, or tidal observations; an artificial island. | 3 | |
| FLOATING_PRODUCTION_VESSEL | An offshore oil/gas <FACILITY> consisting of a moored tanker/barge by which the product is extracted, stored and exported; a floating production vessel. | 4 | |
| MOORING_TOWER | A tower-like <STRUCTURE> secured to the <OCEAN_FLOOR> and surmounted by a turntable to which <VESSEL>s moor; a mooring tower. | 5 | |
| NAVIGATION_AID_SUPPORT | A floating <MARINE_AID_TO_NAVIGATION> support <STRUCTURE> with control room, power and storage <FACILITY>s, attached to the <OCEAN_FLOOR> by a flexible <PIPELINE> and cables. | 6 | |
| OBSERVATION | Used primarily to observe, note, or record information about the surroundings or related events; observation. | 7 | |
| OBSERVATION_RESEARCH | <<<OBSERVATION>>> and/or <<<RESEARCH>>>. | 8 | |
| OIL_DERRICK | A temporary mobile <STRUCTURE>, either fixed or floating, used in the exploration stages of <PETROLEUM_FIELD>s, consisting of a combination of a derrick and <OIL_DRILLING_RIG>. | 9 | |
| PRODUCTION | A permanent offshore <STRUCTURE> equipped to control the production and flow of oil or gas, excluding entirely submarine <STRUCTURE>s. | 10 | |
| RESEARCH | Used primarily for scientific experimentation or research, including scholarly investigation or inquiry, intended to ultimately result in commercial products. | 11 | |
| SINGLE_ANCHOR_LEG_MOORING | A rigid frame or tube with a buoyancy <DEVICE> at its upper end, secured at its lower end to a universal joint on a large steel or concrete base resting on the <OCEAN_FLOOR>, and at its upper end to a mooring <BUOY> by a <FLEXIBLE_RESTRAINT> (for example: a <CHAIN> or <WIRE>); a single anchor leg mooring. | 12 | |
| OIL_BARRIER_TYPE | The type of an <OIL_BARRIER>. | ||
| FLOATING | A floating tube-shaped <STRUCTURE>, with a curtain (2 metres) hanging under it, below the <WATERBODY_SURFACE>, that acts as a <BARRIER> preventing the spread of oil. | 1 | |
| OIL_RETENTION_PIPE | A <PIPE> with <APERTURE>s from which <AIR> blows under high pressure; when the bubbles of <AIR> reach the <WATERBODY_SURFACE> they form a <BARRIER> which prevents the spread of oil; an oil retention pipe. | 2 | |
| OMNIDIR_SHIP_NOISE_CONFIDENCE | A qualitative estimate of the degree of confidence in the <<OMNIDIR_SHIP_NOISE_SPCT_PWR_LVL>> at a specified <<FREQUENCY>>, based on the quantity and variability of the measurements. | ||
| LOW | Low. | 1 | |
| MEDIUM | Medium. | 2 | |
| HIGH | High. | 3 | |
| OPERATING_RESTRICTIONS_TYPE | The conditions during which the use of an <OBJECT> (for example: a <FACILITY> and/or an <AIRSPACE>) is restricted. | ||
| DAYTIME_ONLY | Daytime operations; between sunrise and sunset only. | 1 | |
| NIGHT_TIME_ONLY | Night-time operations; between sunset and sunrise only. | 2 | |
| NO_RESTRICTIONS | No restrictions apply. | 3 | |
| PRONE_TO_FLOODING | Prone to flooding that may restrict normal usage. | 4 | |
| PRONE_TO_ICE | Prone to icy weather conditions that may restrict normal usage. | 5 | |
| PRONE_TO_SNOW | Prone to snowy weather conditions that may restrict normal usage. | 6 | |
| SPECIAL_RESTRICTIONS | Special restrictions apply. | 7 | |
| OPERATING_TIME | The times during which the use of an <OBJECT> (for example: a <FACILITY> and/or an <AIRSPACE>) is unrestricted. | ||
| CONTINUOUS | Continuous. | 1 | |
| DAYTIME | Between sunrise and sunset; daytime. | 2 | |
| NIGHT_TIME | Between sunset and sunrise; night-time. | 3 | |
| SUMMER_TIME_APRIL_OCTOBER | Summer time; April through October. | 4 | |
| WINTER_TIME_NOVEMBER_MARCH | Winter time; November through March. | 5 | |
| OVERHEAD_OBSTRUCTION_TYPE | The type of an <OVERHEAD_OBSTRUCTION>. | ||
| BRIDGE_SUPERSTRUCTURE | Limited by the design of the <BRIDGE>. | 1 | |
| HIGH_TENSION_POWERLINE | Limited by a high-tension <POWER_TRANSMISSION_LINE>. | 2 | |
| RAILWAY_POWERLINE | Limited by a <POWER_TRANSMISSION_LINE> for a <RAILWAY>. | 3 | |
| ROOF | Limited by the design of the <ROOF>. | 4 | |
| VIADUCT_ARCH_CONSTRUCTION | Limited by the construction of the arch overpass of a <VIADUCT>. | 5 | |
| VIADUCT_FRAME_CONSTRUCTION | Limited by the construction of the frame overpass of a <VIADUCT>. | 6 |
http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_18025_Ed1.html