Table 6.25 -- EDCS Attributes whose label begins with V
| Label | Definition | Attribute value type | EQ label | Related concepts | Code |
| VARIABLE_SEA_STATE_FRACTION | The fraction of sea state reports indicating varying sea state during the reporting time interval. | REAL | PURE_NUMBER | 1246 | |
| VARIABLE_WIND_END_DIR | The horizontal angle, measured in a clockwise direction from above, from planetary geodetic north to the ending extreme in wind direction under variable wind direction conditions. Variable wind directions are normally only reported for wind speeds exceeding 3,09 metres per second (six knots) and the variability must equal or exceed a range of 60 arc degrees during the preceding two minutes. | REAL | PLANE_ANGLE | 1247 | |
| VARIABLE_WIND_START_DIR | The horizontal angle, measured in a clockwise direction from above, from planetary geodetic north to the starting extreme in wind direction under variable wind direction conditions. Variable wind directions are normally only reported for wind speeds exceeding 3,09 metres per second (six knots) and the variability must equal or exceed a range of 60 arc degrees during the preceding two minutes. | REAL | PLANE_ANGLE | 1248 | |
| VEGETATION_ROUGHNESS_CODED | A range indicating the roughness of vegetation. | ENUMERATION | 1249 | ||
| VEGETATION_TYPE | The type of vegetation. | ENUMERATION | 1250 | ||
| VEHICLE_CAPACITY | The number of vehicles that an object can accommodate. | INTEGER | PURE_NUMBER | 1251 | |
| VEHICLE_SMOKE_TYPE | The type or origin of smoke from a vehicle. | ENUMERATION | 1252 | ||
| VEHICLE_STOR_DOOR_PRI_HGT | The height of the primary doorway into a structure (e.g., a garage, hangar, tunnel-shelter or other structure) used for ingress and egress of vehicles. | REAL | LENGTH | 1253 | |
| VEHICLE_STOR_DOOR_PRI_WIDTH | The width of the primary doorway into a structure (e.g., a garage, hangar, tunnel-shelter or other structure) used for ingress and egress of vehicles. | REAL | LENGTH | 1254 | |
| VEHICLE_STORAGE_AREA | The total area of a structure (e.g., a garage, hangar, tunnel-shelter or other structure) used for storage of vehicles. | REAL | AREA | 1255 | |
| VEHICULAR_SURFACE_TYPE | The physical surface composition of a road, runway or other surface intended to support the movement of vehicles.. | ENUMERATION | 1256 | ||
| VERTICAL_ACCURACY_ABSOLUTE | The difference between the recorded elevation of an object and its true elevation at a specific point referenced to the same vertical datum at 90% probability. | REAL | LENGTH | EA VERTICAL_ACCURACY_RELATIVE | 1257 |
| VERTICAL_ACCURACY_RELATIVE | The difference between the recorded elevation of an object and its true elevation at a specific point referenced to the same vertical datum. | REAL | LENGTH | EA VERTICAL_ACCURACY_ABSOLUTE | 1258 |
| VERTICAL_CLEARANCE_CLOSED | The vertical clearance of an object in its closed condition, e.g., a closed lifting bridge, measured from the ground surface underneath to the object overhead. | REAL | LENGTH | 1259 | |
| VERTICAL_CLEARANCE_OPENED | The vertical clearance of an object in its opened condition, e.g., an open lifting bridge, measured from the ground surface underneath to the object overhead. | REAL | LENGTH | 1260 | |
| VERTICAL_CLEARANCE_SAFE | The safe vertical clearance of an object measured from the ground surface underneath to the object overhead. | REAL | LENGTH | 1261 | |
| VERTICAL_DATUM | The vertical datum to which elevations and heights are referenced; it is often taken to correspond to MSL. | ENUMERATION | 1262 | ||
| VERTICAL_MSRMNT_QUALITY | The quality of a vertical measurement. | ENUMERATION | 1263 | ||
| VERTICAL_OBST_IDENTIFIER | The eleven character identification code that uniquely identifies an object that is a vertical obstruction to low-level flight. (1-2 = First two characters of [F10-4] country code; 3-6 = WAC Identifier; 7-10 = Unique Obstruction Identification Number; 11 = Producer Code) | STRING | 1264 | ||
| VIRTUAL_AIR_TEMPERATURE | In a system of moist air, the temperature of dry air having the same density and pressure as the moist air. | REAL | THERMO_TEMPERATURE | 1265 | |
| VISIBILITY_DIST_QUALITY | The quality status of visibility distance observation. | ENUMERATION | EA VISIBILITY_DISTANCE | 1266 | |
| VISIBILITY_DIST_VARIABLE | Indicates that the reported visibility distance is variable. | LOGICAL | 1267 | ||
| VISIBILITY_DISTANCE | The horizontal distance at which an object can be seen and identified. | REAL | LENGTH | EA VISIBILITY_REPORT_TYPE | 1268 |
| VISIBILITY_REPORT_TYPE | The type of visibility that is reported. | ENUMERATION | 1269 | ||
| VISUAL_CONTRAST | The apparent contrast of an object expressed as a number between minus one (totally dark target) to zero (no apparent contrast) to infinity (very bright target). | REAL | PURE_NUMBER | 1270 | |
| VISUAL_OPACITY | The fractional opacity (or alpha) of an object in the visual spectrum, i.e., how much light penetrates through the object. | REAL | PURE_NUMBER | 1271 | |
| VISUAL_REFLECTOR | Indicates that a visual reflector is present on an aid to navigation, e.g., beacon, or buoy. | LOGICAL | EA BEACON_OR_BUOY_TYPE, EA BEACON_TYPE, EA BUOY_TYPE, EA NAVAID | 1272 | |
| VISUAL_WAVE_HEIGHT | The mean apparent height of ocean surface waves, measured from trough to crest. | REAL | LENGTH | 1273 | |
| VOLCANIC_FORMATION_TYPE | The type of geologic formation created by volcanic activity. | ENUMERATION | 1274 | ||
| VOLTAGE_LEVEL | The nominal voltage of supplied power to a transport system. | REAL | ELECTRIC_POTENTIAL | 1275 | |
| VOLUME | The internal volume of an object. | REAL | VOLUME | 1276 | |
| VOLUME_BACKSCATTER_GRAD | The depth gradient of the ratio of the flux returned (reflected directly back in the direction of incidence) to the incident flux (generally in decibels per metre of depth, negative sign assumed). Due to interaction between the propagating flux and the transmitting medium. Backscatter gradient may be qualified by other attributes, e.g., the electromagnetic or acoustic band for which the value applies. | REAL | POWER_LEVEL_LENGTH_GRADIENT | EA EM_BAND | 1277 |
| VOLUME_SCATSTRN_LAYER_FREQ | The volume scattering strength layer frequency. | REAL | FREQUENCY | 1278 | |
| VOLUME_SCATSTRN_PROVINCE | The volume scattering strength province; used for linking to external databases. | ENUMERATION | 1279 |