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| Admiralty List of Lights and Fog Signals | |
|---|---|
| Name | Admiralty List of Lights and Fog Signals |
| Country | United Kingdom |
| Publisher | Hydrographic Office |
| Language | English |
| Subject | Nautical aids to navigation |
| Media type | Print, digital |
| First pub | 1861 |
Admiralty List of Lights and Fog Signals is an authoritative publication produced by the Hydrographic Office responsible for cataloguing aids to navigation such as lighthouses, lightships, buoys equipped with lights, and fog signal stations across global waters. It serves mariners, port authorities, and charting agencies including Trinity House, United Kingdom Hydrographic Office, National Oceanic and Atmospheric Administration, Canadian Coast Guard, and international organizations like the International Maritime Organization and the International Hydrographic Organization. The List complements nautical charts used by commercial shipping lines such as Maersk, naval forces including the Royal Navy and United States Navy, and fishing fleets operating under flags like Panama, Liberia, and Marshall Islands.
The publication compiles positional data, light characteristics, structure descriptions, fog signal details, and operational notes covering features maintained by agencies such as Trinity House, Commissioners of Northern Lighthouses, Irish Lights, United States Coast Guard, and state authorities in jurisdictions including Australia, South Africa, Japan, and Brazil. Mariners consulting the List cross-reference entries with nautical charts produced by the United Kingdom Hydrographic Office, National Geospatial-Intelligence Agency, and private chartmakers like Imray and Lloyd's Register. The List is used alongside documents such as Nautical Almanac, Pilots and the Notices to Mariners series.
Origins trace to 19th-century efforts by figures and institutions including Admiral Sir Francis Beaufort, the Board of Admiralty, and publications from the Hydrographic Department (Royal Navy). Early lighthouse catalogues paralleled works like the North American Pilot and lists issued by Trinity House and the Northern Lighthouse Board. The evolution of the List reflects technological transitions from coal-fired lights and Fresnel lens adoption to electrification, radio beacons, and the introduction of GPS-referenced positions, echoing developments recorded by agencies such as the Royal Geographical Society and events like the Industrial Revolution.
Editions have been produced in regional volumes and supplements covering areas including the North Atlantic Ocean, Mediterranean Sea, Caribbean Sea, South China Sea, and Indian Ocean. Printed imprimaturs were distributed to institutions such as the Admiralty (United Kingdom), maritime academies including United States Merchant Marine Academy, and shipping offices of companies like Cunard Line and P&O Cruises. Editorial custodianship shifted with reorganizations of the Hydrographic Office and coordination with national hydrographic offices in France, Spain, Norway, and China. Notable editions responded to geopolitical changes following events such as the World War I, World War II, and regional incidents like the Suez Crisis.
Entries follow a standardized format with columns for geographic coordinates, light colors and periods, nominal range, description of the structure (e.g., tower, skeletal, beacon), fog signal type (whistle, horn, bell), and operational remarks including seasonal lights or decommissioned stations. Field data originates from surveys conducted by vessels such as HMS Challenger and modern survey craft, aerial photogrammetry coordinated with entities like the Ordnance Survey (Great Britain), and satellite positioning from programs including the Global Positioning System. Cross-references link to chart numbers (e.g., Admiralty chart identifiers), radio navigational aids, and related publications like the U.S. List of Lights and regional pilotage guides.
The List covers manned lighthouses, automated beacons, lightships, leading lights, sector lights, and fog signal stations across territorial seas, exclusive economic zones administered by states such as Norway, Chile, India, and overseas territories like Falkland Islands and Bermuda. Commercial shipmasters from lines including MSC (Mediterranean Shipping Company) and Evergreen Marine use the List for passage planning and risk assessment along routes like the Northwest Passage, Cape of Good Hope, Strait of Hormuz, and approaches to ports such as Singapore, Shanghai, and Rotterdam. Naval navigators from forces including the Royal Australian Navy and Indian Navy consult it for coastal transits and exercise planning.
Maintenance of accuracy depends on periodic updates issued through mechanisms such as weekly and monthly notices from national hydrographic offices, coordinated by the International Maritime Organization standards and exchanged via the International Hydrographic Organization network. Changes reported after incidents—groundings, decommissionings, or structural damage from storms or events like Hurricane Katrina—are promulgated in Notices to Mariners bulletins and through broadcast NAVAREA warnings managed by GMDSS coordinators. Stakeholders include port authorities of London, Hamburg, Hong Kong, and regional coast guards.
Modern distribution includes digital databases, Electronic Navigational Charts interoperable with ECDIS systems by manufacturers like Transas and Furuno, and web services consumed by fleet management systems operated by companies such as Kongsberg and Rolls-Royce Marine. Integration leverages standards from the International Hydrographic Organization and the International Telecommunication Union for encoded geospatial metadata, and links to satellite-derived positional services from GLONASS and Galileo. APIs, digital notices, and machine-readable formats facilitate incorporation into voyage data recorders, autonomous vessel navigation stacks being trialed by developers including Wärtsilä and research programs at institutions such as Massachusetts Institute of Technology and University of Southampton.