Source: https://guthlabs.ai/docs/instruments/beaufort-to-wave-height-sea-state/implementation/

instrument implementation / implementation-contract

# Beaufort-to-Wave-Height Sea State implementation

A source-bound implementation contract for Beaufort-to-Wave-Height Sea State; deployment and executable qualification remain separate.

Status: **VERIFIED_CLEAN**Lifecycle: **implementation-contract**

## Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

**Record owner**: Guth Instruments

**Lifecycle**: verified-clean

**Evidence ID**: t7-117

**Effect**: Computation or source lookup only

## Input and validation requirements

The lookup has an undefined out-of-domain input at Beaufort 13, which must be rejected, and an unlabeled wind-speed value such as 10 produces materially different results depending on whether it means m/s or km/h.

## Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

## Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

````
{
  "inputs": {
    "beaufort_number": 0
  },
  "expected_outputs": {
    "wave_height_range_m": {
      "minimum": 0,
      "maximum": 0
    },
    "sea_state_description": "Calm (glassy)",
    "wmo_sea_state_code": 0
  },
  "reference_data": {
    "wmo_sea_state_code": 0,
    "wave_height_range_m": [
      0,
      0
    ],
    "description": "Calm (glassy)",
    "source_convention": "WMO standard sea-state code table, widely tabulated standard value",
    "beaufort_to_sea_state_assumption": "Beaufort 0 -> WMO sea-state code 0; provisional identity mapping"
  },
  "working": "1. Read Beaufort number: B=0.\n2. Apply the stated test convention: sea-state code = B = 0.\n3. WMO code 0 gives wave-height range 0.0–0.0 m.\n4. Therefore the expected output is 0.0–0.0 m, Calm (glassy)."
}
````

## Other records

[01**Overview**](<https://guthlabs.ai/docs/instruments/beaufort-to-wave-height-sea-state/>)[02**Mechanism**](<https://guthlabs.ai/docs/instruments/beaufort-to-wave-height-sea-state/mechanism/>)[04**Qualification**](<https://guthlabs.ai/docs/instruments/beaufort-to-wave-height-sea-state/qualification/>)

## Sources and evidence

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

- `VERIFIED_LEDGER.json`

- `evidence-tranche7/tranche7-results.json`