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Nautical Log Unit Factor Tool

Convert a logged distance with explicit compatible distance-unit factors, without navigation inference.

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Description

Multiply loggedDistance by metersPerLogUnit and divide by targetMetersPerUnit.

A conversion factor maps a quantity onto a declared reporting basis. For ratios and rates, numerator and denominator units must be made coherent before comparison.

Multiply loggedDistance by metersPerLogUnit and divide by targetMetersPerUnit.

When to use this tool

Use Nautical Log Unit Factor when you need a transparent conversion with factors you already know.

How to use the tool and how it works

  1. Enter loggedDistance, metersPerLogUnit, targetMetersPerUnit. Use the units and conventions below.
  2. Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
  3. Read convertedDistance. Use the output convention below.

Multiply loggedDistance by metersPerLogUnit and divide by targetMetersPerUnit. Distance is nonnegative and both factors positive.1

Input fieldMeaning and unitsAccepted input
loggedDistanceLogged DistanceRequired. Finite number; minimum 0.
metersPerLogUnitMeters Per Log UnitRequired. Finite number; strictly above 0.
targetMetersPerUnitTarget Meters Per UnitRequired. Finite number; strictly above 0.
Output fieldInterpretationReturned shape
convertedDistanceConverted DistanceRequired. Finite number.
json
{
  "input": {
    "loggedDistance": 2,
    "metersPerLogUnit": 1852,
    "targetMetersPerUnit": 1000
  },
  "output": {
    "convertedDistance": 3.704
  }
}

Limitations and assumptions

  • Unit definitions are caller supplied; log calibration and distance measurement errors are not corrected.
  • 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

Verify the laboratory's unit definitions and analyte-specific factors, then compare converted quantities on the same basis.

References

  1. Calculation and input contract: nautical/nautical-log-unit-factor — tool.io

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