{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.fog","code":"thing-q37477","url":"https://ver.cy/models/thing/q37477/","name":"fog","alternateNames":["artificial fog","freezing fog","Fog in higher levels","ground fog","radiation fog","whiteout","blowing snow","mist","Haar","ice fog","sea smoke","garúa"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.FLW"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A cloud of tiny water droplets or ice crystals suspended in the air at or near the ground, reducing horizontal visibility below 1 km.","purpose":"Let an agent handle fog through its type, visibility and duration, which matter for transport safety and forecasting.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Fog is defined by visibility below 1 km at the surface.","Fog is a cloud at ground level consisting of suspended liquid water droplets or, in ice fog, ice crystals.","Fog is classified by formation processes including radiation, advection, upslope cooling and evaporation.","Fog is distinct from smog and haze, which are pollution aerosols."],"structure":{"bundles":[{"id":"formation","name":"Formation","description":"How the fog formed.","layers":[{"id":"type","name":"Type","description":"Radiation, advection, upslope.","findings":[{"id":"type-finding","name":"Fog type","description":"The formation process.","questions":[{"text":"What type of fog is this?","kind":"definition"},{"text":"What conditions formed it?","kind":"definition"}]}]},{"id":"lifecycle","name":"Lifecycle","description":"Onset and dissipation.","findings":[{"id":"lifecycle-finding","name":"Timing","description":"When it formed and when it will clear.","questions":[{"text":"When did it form, and when is it expected to clear?","kind":"measurement"},{"text":"What would make it persist?","kind":"boundary"}]}]}]},{"id":"observation","name":"Observation","description":"Measuring visibility.","layers":[{"id":"visibility","name":"Visibility","description":"Measured visibility.","findings":[{"id":"visibility-finding","name":"Visibility reading","description":"The visibility value and instrument.","questions":[{"text":"What is the visibility, and how was it measured?","kind":"measurement"},{"text":"How patchy is the fog?","kind":"measurement"}]}]},{"id":"reports","name":"Reports","description":"METAR and SYNOP codes.","findings":[{"id":"reports-finding","name":"Coded report","description":"The coded reports.","questions":[{"text":"How is this fog reported in METAR or SYNOP?","kind":"provenance"},{"text":"What does the report miss?","kind":"boundary"}]}]}]},{"id":"transport-impact","name":"Transport impact","description":"Effects on travel.","layers":[{"id":"roads","name":"Roads","description":"Driving in fog.","findings":[{"id":"roads-finding","name":"Road guidance","description":"Rules and advice for drivers.","questions":[{"text":"What rules apply to driving in fog here?","kind":"provenance"},{"text":"When should travel be avoided?","kind":"action"}]}]},{"id":"aviation-shipping","name":"Aviation and shipping","description":"Visibility minima.","findings":[{"id":"aviation-shipping-finding","name":"Operational minima","description":"Minima and procedures.","questions":[{"text":"Which visibility minima apply at this airport or port?","kind":"measurement"},{"text":"What procedures apply below them?","kind":"action"}]}]}]},{"id":"other-effects","name":"Other effects","description":"Health, ecosystems and water.","layers":[{"id":"health","name":"Health","description":"Fog and pollution.","findings":[{"id":"health-finding","name":"Health effects","description":"Interaction with pollutants.","questions":[{"text":"Does this fog trap pollutants, forming smog?","kind":"boundary"},{"text":"Who should be advised?","kind":"action"}]}]},{"id":"water","name":"Fog water","description":"Fog collection and ecosystems.","findings":[{"id":"water-finding","name":"Water yield","description":"Water gathered from fog.","questions":[{"text":"How much water can fog collectors yield here?","kind":"measurement"},{"text":"Which ecosystems depend on fog?","kind":"definition"}]}]}]}]},"agentConduct":{"may":["Report fog, visibility and forecasts from official meteorological sources.","Slow down, use lights and keep distance when operating a vehicle it is authorized to drive in fog."],"mustNot":["Operate a vehicle, vessel or drone in fog beyond its sensing and stopping limits.","Present a forecast of clear visibility as certain when fog is possible.","Switch off fog signals, lights or warning systems on roads, ports or airfields."],"requiresHuman":["Closing a road, port or airfield because of fog, or reopening it."]},"ethics":{"considerations":["Sudden fog causes pile-ups; warnings save lives only if they are timely and honest."],"affectedParties":["Drivers, pilots and mariners","Passengers and road users"]},"owners":{"steward":"Nobody owns fog; national meteorological services forecast it and traffic authorities manage its risks.","roles":[],"masterSystems":[]},"relations":[{"target":"Q104541","type":"parent","note":"registry parent class"},{"target":"Q1972098","type":"parent","note":"registry parent class"},{"target":"Q40526","type":"parent","note":"registry parent class"},{"target":"aerosol","type":"related","note":"water droplets suspended in air"},{"target":"cloud","type":"related","note":"cloud at the surface"},{"target":"mist and haze","type":"related","note":"mist is thinner; haze is dry particles"},{"target":"transport","type":"related","note":"visibility limits for roads, aviation and shipping"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.fog","Wikidata: Q37477 (https://www.wikidata.org/wiki/Q37477)","WMO present weather code: codes 40-49 in SYNOP fog reports","METAR code: FG, BR, FZFG aviation weather reports"]},"properties":{"applicability":"required","items":["visibility: below 1000 m - dense fog below 50-200 m depending on the service","droplet diameter: 1-40 micrometres","liquid water content: 0.05-0.5 g/m3"]},"recognition":{"applicability":"required","items":["Visibility below 1 km near the ground","Mist is similar but thinner, with visibility of 1 km or more","Low cloud touching high ground is fog to people on the hill","A grey or white veil near the ground that hides distant objects; freezing fog leaves rime on surfaces."]},"capabilities":{"applicability":"required","items":["forecast it, especially radiation fog overnight","observe it, as visibility in weather reports","plan around it, for aviation, shipping and roads","harvest water from it, with fog collectors in dry regions"]},"hazards":{"applicability":"required","items":["Multi-vehicle collisions in sudden fog","Flight delays and diversions","Ship collisions in reduced visibility","Icing from freezing fog"]},"interfaces":{"applicability":"required","items":["WMO Manual on Codes","ICAO Annex 3 meteorological service for aviation","Road traffic rules on fog lights and speed in fog"]},"context":{"applicability":"required","items":["Describing and forecasting a weather condition that disrupts transport and affects health and ecosystems.","radiation fog","advection fog","upslope fog","freezing fog","ice fog","steam fog"]}},"sources":[{"title":"Wikidata item Q37477: fog","url":"https://www.wikidata.org/wiki/Q37477","note":"identity and sense of the item"},{"title":"Wikipedia: Fog","url":"https://en.wikipedia.org/wiki/Fog","note":"general description of the item"}],"openQuestions":["Should fog types be separate entries?","How should visibility thresholds differ by service and jurisdiction?","How should fog forecasts be expressed for agents advising drivers?"],"resources":{"spec":"/models/things/publications/thing-q37477/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q37477/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T04:35:51Z","builder":"tools/build_cards.py@1.0.0"},"completeness":{"sections":{"classifiers":"filled","whatItIs":"filled","purpose":"filled","distinguishingFeatures":"filled","structure":"filled","agentConduct":"filled","ethics":"filled","owners":"filled","relations":"filled","interaction.identity":"filled","interaction.properties":"filled","interaction.recognition":"filled","interaction.capabilities":"filled","interaction.hazards":"filled","interaction.interfaces":"filled","interaction.context":"filled","sources":"filled"},"notes":{"_gate":"Published through the thing publication gate 1.0 on 2026-10-07T10:10:30+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}