Description
Measure a supplied vessel station coordinate's signed reference offset.
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.
Measure a supplied vessel station coordinate's signed reference offset.
When to use this tool
Use Vessel Trim Reference Station Offset when you already have referenceStationCoordinate, recordedStationCoordinate and need to measure a supplied vessel station coordinate's signed reference offset.
How to use the tool and how it works
- Enter referenceStationCoordinate, recordedStationCoordinate. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedGap. Use the output convention below.
Return recordedStationCoordinate-referenceStationCoordinate in one common length/unit convention.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| referenceStationCoordinate | Reference Station Coordinate | Required. Finite number. |
| recordedStationCoordinate | Recorded Station Coordinate | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedGap | Signed Gap | Required. Finite number. |
{
"input": {
"referenceStationCoordinate": 12,
"recordedStationCoordinate": 17
},
"output": {
"signedGap": 5
}
}Limitations and assumptions
- No vessel geometry, draft, trim, stability or navigational condition is inferred.
- 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
- Wind Relative Bow Quarter Label
Label a recorded wind sector relative to a vessel's bow.
- Transit Bearing Signed Error
Calculate a wrapped signed transit-bearing error.