{
  "title": "Navigation instrument data for AI reference-frame records",
  "source_page": "https://fiund.com/industries/navigation-instrument-reference-frame-data",
  "authorship": "Original fictional Fiund editorial exercise. No actual operating records or third-party source assets are included.",
  "example": {
    "title": "A heading is only meaningful in its named frame",
    "context": "An original orientation diagram uses two invented frame references and no real navigational data.",
    "records": [
      [
        "1",
        "Frame glossary",
        "Reference B is rotated +30° from A; positive angles increase clockwise in this sketch."
      ],
      [
        "2",
        "Reading",
        "Marker direction +20° from B."
      ],
      [
        "3",
        "Request",
        "Express the same direction relative to A."
      ]
    ],
    "question": "What angle represents that direction in A?",
    "answer": "The direction is +50° from A: move +30° to B, then +20° from B to the marker. Records 1 and 2 define both rotations in the same clockwise convention. Keep the raw +20° with its B label for traceability.",
    "failureModes": [
      "Treating the local reading as an A reading",
      "Using the opposite sign for the documented frame rotation"
    ],
    "fields": [
      [
        "reference_frame",
        "Specifies angle origin"
      ],
      [
        "rotation_convention",
        "Defines positive direction"
      ],
      [
        "converted_angle",
        "Records the requested frame result"
      ]
    ],
    "holdout": "Use a sum above 360° and require normalizing only after applying the frame transform.",
    "boundary": "Toy geometry only; no flight, marine, routing, actual navigation readings or operational instructions."
  }
}