Provenance

What this is not

• Not a substitute for official charts, harbour plans or notices.
• Not a berth-booking marketplace and not live availability.
• Not an unexplained “harbour score” out of 100.
• Not a promise of worldwide VTS or coordinator-system integration.

Confidence language

• Authoritative

  Published by the competent authority for that fact.

• Verified

  Corroborated against an operator or authority publication.

• Reported

  Credible operator, captain or compilation report; confirm before use.

• Estimate

  Derived or ranged. Must never be presented as a counted fact.

• Conflict

  Sources disagree. The conflict is the fact until resolved.

• Unverified

  Held, but not yet checked.

Sources

• HM

  Harbour master / marina office published notices

  HARBOURMASTER · Operator publication — verify before use · not redistributed

• PA

  Port authority notices

  PORT_AUTHORITY · Public operational notice · redistributable

• HO

  National hydrographic office / chart catalogue

  HYDROGRAPHIC_OFFICE · Chart licence — not an official chart substitute · not redistributed

• PB

  Admiralty / Imray-style pilot book compilation

  PILOT_BOOK · Copyright compilation — facts extracted, not reproduced · not redistributed

• NTM

  Notices to Mariners

  NOTICE_TO_MARINERS · Public navigational warning · redistributable

• OP

  Marina operator rate card / facilities sheet

  MARINA_OPERATOR · Commercial publication · not redistributed

• YC

  Yacht club yearbook / race instructions

  YACHT_CLUB · Club publication · not redistributed

• FS

  Field survey / berth walk

  FIELD_SURVEY · Harbor Intelligence field notes · redistributable

• OR

  Professional skipper / captain report

  OPERATOR_REPORT · Attributed operational report · redistributable

• OD

  Open government / UN/LOCODE / IATA open data

  OPEN_DATA · Open data · redistributable

• DRV

  Harbor Intelligence derived algorithm

  DERIVED_ALGORITHM · Derived — labeled estimate · redistributable

Explainability rules

• No unexplained marina score. Every band states why.
• A derived occupancy figure is labelled ESTIMATE, never as a counted fact.
• Berth reservation, declared capacity, VTS/port traffic windows, lock bookings and bridge openings are different allocation kinds.
• Guest maps, captain briefings and official charts never share a safety class.
• A nice-looking harbour schematic must never masquerade as an official navigational document.

Live channels

Dossier pages can pull MET Norway weather and ocean-forecast context, ECB reference FX, OpenStreetMap Overpass places, NOAA CO-OPS tides where a station is mapped, and WorldTides when credentials are configured. AIS ingestion runs separately from the web request path. Modelled or observed context never overwrites ledger facts. See Channels.

Ledger scale

68 harbours · 1,234 compiled facts in the current public slice. Fees and occupancy are estimates. Phone numbers that cannot be verified are not invented.