{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.tide","code":"thing-q23384","url":"https://ver.cy/models/thing/q23384/","name":"tide","alternateNames":["mean high water spring","flood tide","river tide","atmospheric tide","dead tide","low tide","mixed tide","high tide","ebb tide","storm flood","king tide","spring tide"],"kind":"thing","status":"published","version":"0.2.0-wave.1","language":"en","classifiers":{"family":"Thing Registry","category":"Activities and processes","entryKind":"thing","plane":"ACT","domain":["ACT.EVT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"The periodic rise and fall of sea level caused mainly by the gravitational pull of the Moon and Sun and the Earth rotation, with high and low tides, spring and neap cycles, and tides in rivers and the atmosphere.","purpose":"Let an agent handle tides with times, heights, datums and local effects, and give safety information for coasts.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Periodic, predictable","Spring and neap cycles","Heights refer to a datum","Storm surges add to tides"],"structure":{"bundles":[{"id":"prediction","name":"Prediction","description":"Times and heights.","layers":[{"id":"times","name":"Times","description":"High and low water.","findings":[{"id":"times-finding","name":"Times","description":"Tide times.","questions":[{"text":"When are high and low water at this place?","kind":"measurement"},{"text":"From which tide table?","kind":"provenance"}]}]},{"id":"heights","name":"Heights","description":"Datum.","findings":[{"id":"heights-finding","name":"Heights","description":"Heights and datum.","questions":[{"text":"What heights, relative to which datum?","kind":"measurement"},{"text":"How do local effects change them?","kind":"boundary"}]}]}]},{"id":"cycles","name":"Cycles","description":"Spring and neap.","layers":[{"id":"spring-neap","name":"Spring and neap","description":"Monthly cycle.","findings":[{"id":"spring-neap-finding","name":"Cycle","description":"Tidal cycle.","questions":[{"text":"Is it a spring or neap period?","kind":"definition"},{"text":"How large is the range?","kind":"measurement"}]}]},{"id":"type","name":"Type","description":"Semidiurnal or diurnal.","findings":[{"id":"type-finding","name":"Type","description":"Tide type.","questions":[{"text":"What tide type occurs here?","kind":"definition"},{"text":"Why?","kind":"definition"}]}]}]},{"id":"safety","name":"Safety","description":"Coastal risk.","layers":[{"id":"cutoff","name":"Cut-off","description":"Incoming tide.","findings":[{"id":"cutoff-finding","name":"Cut-off","description":"Cut-off risk.","questions":[{"text":"Could someone be cut off by the tide here?","kind":"boundary"},{"text":"What should they do?","kind":"action"}]}]},{"id":"flooding","name":"Flooding","description":"Surges.","findings":[{"id":"flooding-finding","name":"Flooding","description":"Flood risk.","questions":[{"text":"Is a storm surge expected on top of high tide?","kind":"boundary"},{"text":"Are warnings in force?","kind":"provenance"}]}]}]},{"id":"uses","name":"Uses","description":"Navigation and energy.","layers":[{"id":"navigation","name":"Navigation","description":"Under-keel clearance.","findings":[{"id":"navigation-finding","name":"Navigation","description":"Navigation.","questions":[{"text":"What depth will there be at this time?","kind":"measurement"},{"text":"Is it safe to transit?","kind":"boundary"}]}]},{"id":"energy","name":"Energy","description":"Tidal power.","findings":[{"id":"energy-finding","name":"Energy","description":"Tidal energy.","questions":[{"text":"What tidal energy potential exists here?","kind":"measurement"},{"text":"What are the environmental effects?","kind":"boundary"}]}]}]}]},"agentConduct":{"may":["Report tide times and heights from official tide tables for a stated place.","Warn people on beaches, causeways and estuaries of a rising tide."],"mustNot":["Present a rough estimate as an official tide prediction for navigation.","Direct people or vehicles onto tidal paths when the tide is coming in.","Ignore weather effects such as storm surge when advising on safety."],"requiresHuman":["Closing a tidal crossing or ordering people off a beach."]},"ethics":{"considerations":["Incoming tides trap and drown people who misjudge them.","Coastal livelihoods such as fishing depend on accurate tide information."],"affectedParties":["Beach users and walkers","Mariners and fishers","Coastal residents"]},"owners":{"steward":"Nobody: a natural phenomenon; hydrographic offices publish the official predictions.","roles":[],"masterSystems":["Official tide tables of hydrographic offices"]},"relations":[{"target":"Q12142910","type":"parent","note":"registry parent class"},{"target":"Q170475","type":"parent","note":"registry parent class"},{"target":"Q6968165","type":"parent","note":"registry parent class"},{"target":"Moon and Sun","type":"related","note":"gravity"},{"target":"body of water","type":"related","note":"coasts"},{"target":"storm surge","type":"related","note":"flooding"},{"target":"tidal energy","type":"related","note":"resource"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.tide","Wikidata: Q23384 (https://www.wikidata.org/wiki/Q23384)","tide gauge id: national or PSMSL station id observations"]},"properties":{"applicability":"not-applicable","items":["tidal range: 0-16 m - Bay of Fundy near 16 m","semidiurnal period: about 12.42 hours"]},"recognition":{"applicability":"optional","items":["Tide tables and gauges","Terms such as spring tide, neap tide, flood tide","Chart datum on nautical charts","Water rising and falling on shores; exposed flats at low tide."]},"capabilities":{"applicability":"required","items":["predict tide times and heights","plan navigation and coastal walks","generate tidal energy","study tidal ecosystems"]},"hazards":{"applicability":"required","items":["People cut off by incoming tides","Wrong datum in calculations","Coastal flooding with surges"]},"interfaces":{"applicability":"required","items":["National hydrographic office tide tables","IHO standards for chart datums"]},"context":{"applicability":"required","items":["Navigation, coastal safety, fishing, energy and ecology.","semidiurnal, diurnal and mixed tides","spring and neap tides","river tides and bores","atmospheric and Earth tides"]}},"sources":[{"title":"Wikidata item Q23384: tide","url":"https://www.wikidata.org/wiki/Q23384","note":"identity and sense of the item"},{"title":"Wikipedia: Tide","url":"https://en.wikipedia.org/wiki/Tide","note":"general description of the item"}],"openQuestions":["Should tide types be separate entries?","How should tide predictions be linked by station?","How should safety advice be localised?"],"resources":{"spec":"/models/things/publications/thing-q23384/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q23384/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T06:31:18Z","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":"not-applicable","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 2026-10-06T19:51:57+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass","interaction.properties":"Plane ACT: no invented physical properties."},"score":1.0}}