← Back to catalogue
Published

tide

vr.tr.tide · thing-q23384

Let an agent handle tides with times, heights, datums and local effects, and give safety information for coasts.

Thing Registry Activities and processes ACT.EVT
Bundle → Layer → Finding → QuestionsClassifiersWhat it isWhy it existsDistinguishing featuresWhat robots and AI may and may not doMoral aspectsOwnersLinks to other meta-modelsIdentity and identifiersDirect propertiesRecognitionCapabilities and actionsHazards and failure modesStandards and interfacesContext of useSources

Bundle → Layer → Finding → Questions Filled

4 bundles · 8 layers · 8 findings · 16 questions

Prediction Times and heights.

Times

High and low water.

Times

Tide times.

  1. When are high and low water at this place? measurement
  2. From which tide table? provenance

Heights

Datum.

Heights

Heights and datum.

  1. What heights, relative to which datum? measurement
  2. How do local effects change them? boundary
Cycles Spring and neap.

Spring and neap

Monthly cycle.

Cycle

Tidal cycle.

  1. Is it a spring or neap period? definition
  2. How large is the range? measurement

Type

Semidiurnal or diurnal.

Type

Tide type.

  1. What tide type occurs here? definition
  2. Why? definition
Safety Coastal risk.

Cut-off

Incoming tide.

Cut-off

Cut-off risk.

  1. Could someone be cut off by the tide here? boundary
  2. What should they do? action

Flooding

Surges.

Flooding

Flood risk.

  1. Is a storm surge expected on top of high tide? boundary
  2. Are warnings in force? provenance
Uses Navigation and energy.

Navigation

Under-keel clearance.

Navigation

Navigation.

  1. What depth will there be at this time? measurement
  2. Is it safe to transit? boundary

Energy

Tidal power.

Energy

Tidal energy.

  1. What tidal energy potential exists here? measurement
  2. What are the environmental effects? boundary

Classifiers Filled

Family
Thing Registry
Category
Activities and processes
Entry kind
thing
Plane
ACT
Domain
ACT.EVT
Other names and narrower kinds
mean high water spring, flood tide, river tide, atmospheric tide, dead tide, low tide, mixed tide, high tide, ebb tide, storm flood, king tide, spring tide

What it is Filled

The periodic rise and fall of sea level caused mainly by the gravitational pull of the Moon and Sun and the Earth rotation, with high and low tides, spring and neap cycles, and tides in rivers and the atmosphere.

Why it exists Filled

Let an agent handle tides with times, heights, datums and local effects, and give safety information for coasts.

Distinguishing features Filled

  • Periodic, predictable
  • Spring and neap cycles
  • Heights refer to a datum
  • Storm surges add to tides

What robots and AI may and may not do Filled

Must not

  • Present a rough estimate as an official tide prediction for navigation.
  • Direct people or vehicles onto tidal paths when the tide is coming in.
  • Ignore weather effects such as storm surge when advising on safety.

Only with a human decision

  • Closing a tidal crossing or ordering people off a beach.

May

  • Report tide times and heights from official tide tables for a stated place.
  • Warn people on beaches, causeways and estuaries of a rising tide.

Moral aspects Filled

  • Incoming tides trap and drown people who misjudge them.
  • Coastal livelihoods such as fishing depend on accurate tide information.

Who is affected

  • Beach users and walkers
  • Mariners and fishers
  • Coastal residents

Owners Filled

Steward

Nobody: a natural phenomenon; hydrographic offices publish the official predictions.

Master systems

  • Official tide tables of hydrographic offices

Links to other meta-models Filled

parent

  • Q12142910 - registry parent class
  • Q170475 - registry parent class
  • Q6968165 - registry parent class

related

  • Moon and Sun - gravity
  • body of water - coasts
  • storm surge - flooding
  • tidal energy - resource

What else AI and robots need to interact with it Filled

Identity and identifiers required Filled

  • Vercy registry: vr.tr.tide
  • Wikidata: Q23384 (https://www.wikidata.org/wiki/Q23384)
  • tide gauge id: national or PSMSL station id observations

Direct properties not applicable Not applicable

  • tidal range: 0-16 m - Bay of Fundy near 16 m
  • semidiurnal period: about 12.42 hours

Plane ACT: no invented physical properties.

Recognition optional Filled

  • Tide tables and gauges
  • Terms such as spring tide, neap tide, flood tide
  • Chart datum on nautical charts
  • Water rising and falling on shores; exposed flats at low tide.

Capabilities and actions required Filled

  • predict tide times and heights
  • plan navigation and coastal walks
  • generate tidal energy
  • study tidal ecosystems

Hazards and failure modes required Filled

  • People cut off by incoming tides
  • Wrong datum in calculations
  • Coastal flooding with surges

Standards and interfaces required Filled

  • National hydrographic office tide tables
  • IHO standards for chart datums

Context of use required Filled

  • Navigation, coastal safety, fishing, energy and ecology.
  • semidiurnal, diurnal and mixed tides
  • spring and neap tides
  • river tides and bores
  • atmospheric and Earth tides

Sources Filled

  1. Wikidata item Q23384: tide - identity and sense of the item
  2. Wikipedia: Tide - general description of the item

Open questions

  • Should tide types be separate entries?
  • How should tide predictions be linked by station?
  • How should safety advice be localised?

Machine files

Card as JSON Specification Card backlog vercy.card/1

Provenance

thing registry research (pass 2) · unreviewed

Built from: models/things/publications/thing-q23384/spec.json