{"schema":"https://ver.cy/schemas/card/1.0.0","id":"vr.tr.isolated-danger-mark","code":"thing-q1310021","url":"https://ver.cy/models/thing/q1310021/","name":"isolated danger mark","alternateNames":[],"kind":"thing","status":"published","version":"0.2.0-wave.4","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 navigational aid used at sea, a buoy or beacon that marks an isolated danger such as a rock or wreck that has navigable water all around it, so vessels know to keep clear; it is one of the standard categories of sea mark defined by the international buoyage system, distinguished by black and red bands and, when lit, a specific flash pattern with two spheres as a topmark. It warns of a point hazard rather than marking a channel side.","purpose":"Let an agent explain the isolated danger mark, relay its meaning, appearance and use from maritime navigation sources, and distinguish it from lateral marks, cardinal marks and safe-water marks.","scope":{"in":[],"out":[],"boundaries":[]},"distinguishingFeatures":["Marks a point danger","Clear water all around","Black with red bands","Two-sphere topmark"],"structure":{"bundles":[{"id":"understand","name":"Understand","description":"What the mark is.","layers":[{"id":"definition","name":"Definition","description":"Definition.","findings":[{"id":"definition-finding","name":"Definition","description":"Definition.","questions":[{"text":"What is an isolated danger mark, and how does it differ from lateral, cardinal and safe-water marks?","kind":"definition"},{"text":"Is the question about navigation safety needing charts and training?","kind":"boundary"}]}]},{"id":"recognition","name":"Recognition","description":"Recognition.","findings":[{"id":"recognition-finding","name":"Recognition","description":"Recognition.","questions":[{"text":"How is an isolated danger mark recognised by colour and topmark?","kind":"definition"},{"text":"Which entry fits the related mark?","kind":"action"}]}]}]},{"id":"appearance","name":"Appearance","description":"Appearance.","layers":[{"id":"colours","name":"Colours","description":"Colours and topmark.","findings":[{"id":"colours-finding","name":"Colours","description":"Colours.","questions":[{"text":"What colours and topmark identify the mark?","kind":"provenance"},{"text":"Which references are standard?","kind":"provenance"}]}]},{"id":"light","name":"Light","description":"Light pattern.","findings":[{"id":"light-finding","name":"Light","description":"Light.","questions":[{"text":"What light pattern does a lit isolated danger mark show?","kind":"provenance"},{"text":"Which sources are cited?","kind":"provenance"}]}]}]},{"id":"use","name":"Use","description":"Use.","layers":[{"id":"meaning","name":"Meaning","description":"Meaning.","findings":[{"id":"meaning-finding","name":"Meaning","description":"Meaning.","questions":[{"text":"What should a mariner do on seeing this mark?","kind":"provenance"},{"text":"Is proper training and charting needed?","kind":"boundary"}]}]},{"id":"system","name":"System","description":"Buoyage system.","findings":[{"id":"system-finding","name":"System","description":"System.","questions":[{"text":"How does the mark fit the international buoyage system?","kind":"provenance"},{"text":"Which entry fits the buoyage system?","kind":"action"}]}]}]},{"id":"context","name":"Context","description":"Context.","layers":[{"id":"regions","name":"Regions","description":"Regional systems.","findings":[{"id":"regions-finding","name":"Regions","description":"Regions.","questions":[{"text":"How do buoyage regions affect sea marks?","kind":"provenance"},{"text":"Is the information current?","kind":"boundary"}]}]},{"id":"related","name":"Related","description":"Related marks.","findings":[{"id":"related-finding","name":"Related","description":"Related.","questions":[{"text":"How does this mark relate to cardinal and lateral marks?","kind":"provenance"},{"text":"Which entry fits the related mark?","kind":"action"}]}]}]}]},"agentConduct":{"may":["Identify the mark by its black and red bands, two-sphere topmark and light pattern, citing the buoyage rules.","Report a mark that is missing, off station, unlit or damaged to the responsible authority.","Steer an authorized vessel to keep clear of the danger the mark indicates."],"mustNot":["Move, damage, tie up to or interfere with a navigation mark.","Confuse the mark with cardinal or lateral marks when advising on a passage.","Pass close to the mark or between it and its danger.","Rely on the mark's position alone without checking current charts and notices to mariners."],"requiresHuman":["Issuing or changing navigational warnings about a mark."]},"ethics":{"considerations":["Mariners' lives depend on marks being where charts say and being read correctly.","Tampering with aids to navigation endangers every vessel in the area."],"affectedParties":["Mariners and crews","Passengers","Coastal communities"]},"owners":{"steward":"The national lighthouse or navigation authority responsible for aids to navigation in those waters.","roles":[],"masterSystems":["Official charts and lists of lights","Notices to mariners"]},"relations":[{"target":"Q3565782","type":"parent","note":"registry parent class"},{"target":"navigational aid","type":"related","note":"in registry terms"},{"target":"lateral mark","type":"related"},{"target":"cardinal mark","type":"related"},{"target":"safe-water mark","type":"related"}],"interaction":{"identity":{"applicability":"required","items":["Vercy registry: vr.tr.isolated-danger-mark","Wikidata: Q1310021 (https://www.wikidata.org/wiki/Q1310021)"]},"properties":{"applicability":"required","items":["marks: an isolated point danger note","topmark: two black spheres note","registry parent: navigational aid note"]},"recognition":{"applicability":"required","items":["Black-and-red buoy with two-sphere topmark","Isolated danger mark","Lateral marks show channel sides; cardinal marks show the safe side of a danger; safe-water marks show clear water","A black buoy or beacon with one or more broad red horizontal bands, topped by two black spheres, flashing in a set group when lit."]},"capabilities":{"applicability":"required","items":["explain the mark","relay its appearance and lights","relay its use","distinguish it from other marks"]},"hazards":{"applicability":"required","items":["Confusing with cardinal or lateral marks","Misreading the topmark","Ignoring the light pattern"]},"interfaces":{"applicability":"required","items":["International maritime buoyage system"]},"context":{"applicability":"required","items":["Marking an isolated danger with clear water around it.","lit isolated danger mark","unlit isolated danger mark"]}},"sources":[{"title":"Wikidata item Q1310021: isolated danger mark","url":"https://www.wikidata.org/wiki/Q1310021","note":"identity and sense of the item"},{"title":"Wikipedia: Isolated danger mark","url":"https://en.wikipedia.org/wiki/Isolated_danger_mark","note":"general description of the item"}],"openQuestions":["Should lit and unlit versions be distinguished?","How should the buoyage system be linked?","How should regional buoyage differences be noted?"],"resources":{"spec":"/models/things/publications/thing-q1310021/spec.json"},"provenance":{"origin":"thing registry research (pass 2)","builtFrom":["models/things/publications/thing-q1310021/spec.json"],"providers":["Claude"],"researchStatus":"unreviewed","generatedAt":"2026-09-14T03:47:14Z","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 2026-10-06T19:51:54+00:00: completeness 1.00; sense: Wikidata description; 2 live sources; review by codex: pass"},"score":1.0}}