Wind Speed Unit/Force Converter

Inspectable records

Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Area

Earth & Space (astronomy, orbital mechanics, meteorology, geology, geodesy, oceanography)

Tranche

tranche-5

Evidence ID

t5-176

Ledger rows

1

No ledger note is attached.

Review findings

The instrument should publish its exact conversion constants, precision and rounding policy, accepted-unit spelling, negative-input behavior, Beaufort threshold standard, and wind averaging convention before release. The honest label is currently empty; it should state that Beaufort is an approximate wind-force classification dependent on the selected standard and wind-measurement convention.

Formula and scope findings

• The specification says "standard unit conversion factors" but does not provide the actual factor table or output rounding rules, so the exact formulas cannot be fully verified.
• Beaufort is a categorical wind-force classification rather than a unit conversion, and the required threshold convention is unspecified. The test vectors assume the common knot-based integer ranges: B0 <1 kt, B1 = 1–3 kt, B2 = 4–6 kt, B3 = 7–10 kt, B4 = 11–16 kt, B5 = 17–21 kt, B6 = 22–27 kt, B7 = 28–33 kt, B8 = 34–40 kt, B9 = 41–47 kt, B10 = 48–55 kt, B11 = 56–63 kt, B12 >=64 kt.
• The specification does not state whether Beaufort classification uses instantaneous wind, sustained wind, or a time-averaged wind measurement.

Unit assumptions

• Use 1 knot = 1.150779 mph = 1.852 km/h = 0.514444 m/s.
• Use 1 mph = 1.609344 km/h = 0.44704 m/s.
• Use 1 km/h = 0.2777777778 m/s.
• Displayed converted values are rounded to 5 decimal places; calculations use the stated factors before rounding.
• Beaufort classification is based on the converted speed in knots using the common integer knot ranges listed in formula_issues.

Boundary hardening

BREAK_CLAIMED · SELF_FLAGGED

The converter has hazardous behavior at extreme finite inputs because ordinary JavaScript arithmetic overflows converted units to Infinity. Negative signed inputs also expose an unresolved speed-versus-direction convention and produce undefined Beaufort output unless explicitly rejected or converted to an absolute magnitude.

Errata and corrections

No applied erratum is attached to this unique-name record.

Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

{
  "inputs": {
    "wind_speed": 0,
    "unit": "m/s"
  },
  "expected_outputs": {
    "knots": 0,
    "mph": 0,
    "km/h": 0,
    "m/s": 0,
    "beaufort": 0
  },
  "working": "Start with 0 m/s. Knots: 0 / 0.514444 = 0 kt. mph: 0 x 2.236936 = 0 mph. km/h: 0 x 3.6 = 0 km/h. The speed is below 1 kt, so Beaufort = 0."
}

Related workflows

No source-defined multi-instrument workflow membership is recorded.

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json · VERIFIED_CLEAN
• evidence-tranche5/tranche5-results.json
• BOUNDARY_HAZARD_CATALOG.json