Source: https://guthlabs.ai/docs/instruments/tide-table-lookup-local-station/

instrument / source-required

# Tide Table Lookup (local station)

This live-data instrument is held from offline verification. It may ship only with visible source freshness and feed provenance.

Status: **DISPOSED_UNVERIFIABLE_OFFLINE**Lifecycle: **source-required**

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/tide-table-lookup-local-station/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/tide-table-lookup-local-station/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/tide-table-lookup-local-station/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/tide-table-lookup-local-station/qualification/>)

## Ledger state

This live-data instrument is held from offline verification. It may ship only with visible source freshness and feed provenance.

**Area**: Earth & Space

**Tranche**: disposal-network

**Evidence ID**: offline/source boundary

**Ledger rows**: 1

- requires live network data (tides/FX rates); no offline recompute gate possible — correctness is a data-feed property, not a formula property. Ship only with live-data provenance shown in-app.

## Review findings

No offline formula review exists for this live-data surface.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

The instrument cannot produce authoritative numeric tide predictions offline or without station-specific harmonic constants and live data. Boundary, extreme-date, calendar-transition, and time-zone cases also require explicit rejection or documented conventions; silently extrapolating, fabricating values, or choosing a time convention could create unsafe boating information.

## Errata and corrections

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

## Inspectable example

No offline example is asserted for this source-required instrument.

## 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 · DISPOSED_UNVERIFIABLE_OFFLINE`

- `BOUNDARY_HAZARD_CATALOG.json`