{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.sea-mark","code":"thing-q98272210","url":"https://ver.cy/models/thing/q98272210/","name":"sea mark","alternateNames":["sea cairn","leading marks","Stångmärket Valen","top mark","lateral mark","daymark","lateral buoy","Refuge Beacon","daymark tower"],"kind":"thing","status":"published","version":"0.2.0-wave.2","language":"en","classifiers":{"family":"Thing Registry","category":"Physical world and living systems","entryKind":"thing","plane":"PHY","domain":["PHY.BLT"],"industry":[],"navPath":"","tags":[],"facets":{}},"whatItIs":"A sea mark system is a maritime navigation aid system in which fixed or floating marks and recognised landmarks guide vessels and support orientation, including lateral and cardinal marks, buoys, beacons, daymarks, leading marks and historic stone marks; international buoyage conventions apply to relevant buoyage aids, while historic marks and coastal landmarks do not necessarily follow those conventions or receive national authority maintenance.","purpose":"Let an agent explain sea marks and the buoyage system, identify marks and their meanings, support safe navigation in general terms, and describe historic sea marks.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["The system supports maritime navigation through marks and recognised landmarks.","Colours and shapes carry standardised meanings where applicable buoyage conventions govern them.","Its components can include fixed marks, floating marks and coastal landmarks.","Maintenance responsibilities vary by aid and jurisdiction, and some historic marks or landmarks have no designated maintainer."],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"The buoyage system.","layers":[{"id":"system","name":"System","description":"Marks and meanings.","findings":[{"id":"system-finding","name":"System","description":"System.","questions":[{"text":"What do lateral, cardinal, isolated danger, safe water and special marks mean, and how do regions A and B differ?","kind":"definition"},{"text":"What are top marks and daymarks?","kind":"definition"}]}]},{"id":"leading","name":"Leading","description":"Leading marks.","findings":[{"id":"leading-finding","name":"Leading","description":"Leading marks.","questions":[{"text":"How do leading marks and ranges indicate a safe channel?","kind":"definition"},{"text":"Which entry fits a specific mark?","kind":"action"}]}]}]},{"id":"navigate","name":"Navigate","description":"Using sea marks.","layers":[{"id":"read","name":"Read","description":"Reading marks at sea.","findings":[{"id":"read-finding","name":"Read","description":"Reading.","questions":[{"text":"How are sea marks identified from a vessel and matched to charts and notices to mariners?","kind":"action"},{"text":"Is a vessel in danger now, needing emergency services?","kind":"boundary"}]}]},{"id":"training","name":"Training","description":"Training.","findings":[{"id":"training-finding","name":"Training","description":"Training.","questions":[{"text":"How is buoyage taught in skipper and yachtmaster training?","kind":"provenance"},{"text":"Which entry fits navigation training?","kind":"action"}]}]}]},{"id":"maintain","name":"Maintain","description":"Maintenance and authority.","layers":[{"id":"authorities","name":"Authorities","description":"Who maintains marks.","findings":[{"id":"authorities-finding","name":"Authorities","description":"Authorities.","questions":[{"text":"Which authorities place and maintain sea marks, and how are changes published?","kind":"provenance"},{"text":"How are damaged marks reported?","kind":"action"}]}]},{"id":"technology","name":"Technology","description":"Modern marks.","findings":[{"id":"technology-finding","name":"Technology","description":"Technology.","questions":[{"text":"How do virtual and electronic aids complement physical sea marks?","kind":"provenance"},{"text":"Which entry fits electronic navigation?","kind":"action"}]}]}]},{"id":"learn","name":"Learn","description":"History.","layers":[{"id":"history","name":"History","description":"Historic sea marks.","findings":[{"id":"history-finding","name":"History","description":"History.","questions":[{"text":"How did sea marks develop from cairns and stone marks to the standardised system?","kind":"provenance"},{"text":"Which historic marks are protected?","kind":"provenance"}]}]},{"id":"teach","name":"Teach","description":"Teaching.","findings":[{"id":"teach-finding","name":"Teach","description":"Teaching.","questions":[{"text":"How can buoyage be taught with charts and models?","kind":"action"},{"text":"Which misconceptions arise?","kind":"provenance"}]}]}]}]},"agentConduct":{"may":["Describe sea marks, their shapes, colours and meanings under the regional buoyage system.","Report a missing, damaged or displaced mark to the authority that maintains it."],"mustNot":["Move, damage or obscure a sea mark.","Place a mark or light that could be mistaken for an official one.","Interpret marks using the wrong regional colour convention.","Present a mark as in position when it has been reported displaced."],"requiresHuman":["Issuing a notice to mariners about a changed or missing mark."]},"ethics":{"considerations":["Mariners rely on marks to avoid grounding, so errors can cost lives.","Historic stone marks are cultural heritage of coastal communities."],"affectedParties":["Mariners","Rescue crews","Coastal communities"]},"owners":{"steward":"Responsible maritime authorities and individual aid custodians oversee their respective components, while historic marks and coastal landmarks may have different custodians or no designated maintainer.","roles":[],"masterSystems":["Official lists of lights and marks document relevant navigation aids.","Nautical charts and notices to mariners record navigation information and changes."]},"relations":[{"target":"Q13580385","type":"parent","note":"registry parent class"},{"target":"Q811979","type":"parent","note":"registry parent class"},{"target":"built structure","type":"related","note":"category"},{"target":"geographical marker","type":"related","note":"category"},{"target":"lighthouse","type":"related","note":"lit aids to navigation"},{"target":"port","type":"related","note":"harbour approaches"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.sea-mark","Wikidata: Q98272210 (https://www.wikidata.org/wiki/Q98272210)"]},"properties":{"applicability":"required","items":["Height above water:  m - Measured from a stated water level to the top of the mark, with tidal conditions recorded for fixed structures.","Horizontal dimensions:  m - Measured across the body or daymark to describe its physical size.","Light flash period:  s - For a lighted mark with a repeating signal, measured as the time taken for one complete light sequence."]},"recognition":{"applicability":"required","items":["The system comprises marks and recognised landmarks used to guide vessels.","Colours, shapes and top marks carry meaning under applicable conventions.","A lighthouse is a lit aid, while many other components are unlit.","A single visible mark is a component rather than the whole navigation aid system.","Buoys, beacons, cairns and painted structures on shores and rocks."]},"capabilities":{"applicability":"required","items":["explain the buoyage system","identify marks and meanings","support navigation understanding","describe historic marks"]},"hazards":{"applicability":"required","items":["Misreading marks leading to grounding","Displaced or damaged marks","Confusing regional colour conventions"]},"interfaces":{"applicability":"required","items":["International buoyage system regions A and B","National aids to navigation regulations","Chart symbol standards"]},"context":{"applicability":"required","items":["Markers for marine navigation.","lateral and cardinal marks","leading marks and ranges","daymarks and beacons","sea cairns and historic stone marks","special and isolated danger marks"]}},"sources":[{"title":"Wikidata item Q98272210: sea mark","url":"https://www.wikidata.org/wiki/Q98272210","note":"identity and sense of the item"},{"title":"Wikipedia: Sea mark","url":"https://en.wikipedia.org/wiki/Sea_mark","note":"general description of the item"}],"openQuestions":["Should each mark type be a separate entry?","How should notices to mariners be linked?","How should historic marks be documented?"],"resources":{"spec":"/models/things/publications/thing-q98272210/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q98272210/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-11T23:57:40Z","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 2026-10-07T12:16:35+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}