Description
Calculate a distance calibration factor as reference per indicated distance.
Nautical quantities require explicit north, datum, sign, station and unit conventions. A wrapped bearing error has a chosen opposite-direction endpoint, while a circular sector has its own start and end policy. Supplied polar speeds, tank factors and tide labels are references rather than verified navigation or vessel conditions.
Calculate a distance calibration factor as reference per indicated distance.
When to use this tool
Use Nautical Log Calibration Distance Ratio when you already have indicatedDistance, suppliedReferenceDistance and need to calculate a distance calibration factor as reference per indicated distance.
How to use the tool and how it works
- Enter indicatedDistance, suppliedReferenceDistance. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read referencePerIndicatedFactor. Use the output convention below.
Require indicatedDistance>0 and referenceDistance>=0; return reference/indicated.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| indicatedDistance | Indicated Distance | Required. Finite number; strictly above 0. |
| suppliedReferenceDistance | Supplied Reference Distance | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| referencePerIndicatedFactor | Reference Per Indicated Factor | Required. Finite number. |
{
"input": {
"indicatedDistance": 10,
"suppliedReferenceDistance": 12
},
"output": {
"referencePerIndicatedFactor": 1.2
}
}Limitations and assumptions
- The factor may be zero; no route, instrument calibration validity, correction uncertainty or navigational suitability is established.
- 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 verified charts, observations, vessel documentation and the complete relevant geometric or hydrostatic model for a navigational question. Preserve the local bearing/datum convention and treat scalar factors or sector checks as limited inputs rather than operational decisions.
References
Similar or alternative tools
- Sailing Polar Single Speed Ratio
Compare observed sailing speed with a supplied polar reference speed.
- Navigation Light Relative Sector Membership
Check a bearing against a supplied circular sector and end-inclusion rule.