Description
Accept bearings from 0 through 360 degrees and normalize 360 to zero.
Bearings are circular coordinates, so zero and 360 degrees represent the same direction. Sector boundaries and true, magnetic, compass, or relative references need explicit conventions.
Accept bearings from 0 through 360 degrees and normalize 360 to zero.
When to use this tool
Use Nautical: Compass Point Halfwind Label when you need a bearing normalization, sign correction, or sector label.
How to use the tool and how it works
- Enter bearingDegrees. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read result. Expand result to inspect the returned fields.
Accept bearings from 0 through 360 degrees and normalize 360 to zero. Add 11.25 degrees, divide into 22.5-degree sectors, and return the corresponding 16-point compass label and zero-based index.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| bearingDegrees | Bearing Degrees | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| result | Result | Required. Object. |
| result.point | Point | Calculated result member: string. |
| result.index | Index | Calculated result member: number. |
{
"input": {
"bearingDegrees": 22.5
},
"output": {
"result": {
"point": "NNE",
"index": 1
}
}
}Limitations and assumptions
- Exact midpoint boundaries round clockwise; no magnetic correction or angular uncertainty is applied.
- Outputs are nested inside result. Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use current heading and magnetic information and a complete navigation process when interpreting an actual course or contact.
References
Similar or alternative tools
- Compass Card Sector Boundary Policy
Normalize heading into [0, 360) and divide the circle into sectorCount equal sectors.
- Bearing Quadrant Token
For exact multiples of 90 return the caller's boundaryToken; otherwise select NE, SE, SW, or NW.