Admiralty Digital Publications





Admiralty Digital Publications (ADP)  provide mariners with efficient, intuitive and flexible navigation and planning of passages.


Included with ADP:

  • The worldwide authority on light and fog signals: Admiralty Digital List of Lights


  • The worldwide authority on maritime radio signals: Admiralty Digital Radio Signals


  • Aiding in the calculation of time and positions: the time-keeping and positional references in Digital Radio Signals - Volume 2


  • Digital Radio Signals - Volume 6 contains essential radio information for maritime communication covering 3,600 locations around the world.


  • Global tidal predictions are provided by Admiralty TotalTide. This real time service predicts both height and stream data.



Admiralty Digital Publications allow bridge crews to access important information in an efficient and timely manner. These improved efficiencies enable crews to devote more time to decision making and less to clerical tasks. Most ships carrying out business have flag state approval: ADPs meet with carriage requirements.


What is ADP?

Essential paper publications produced by the United Kingdom Hydrographic Office (UKHO) have been made available in digital form by Admiralty. ADP contains identical information to corresponding paper publications and are approved as meeting SOLAS carriage provisions.



The ADP range currently includes:

  • The Admiralty Digital List of Lights (ADLL): Over 70,000 lighthouses and other sources of light are covered. Weekly updates are available by e-mail, CD or Internet download. This is the most comprehensive guide to maritime lights available today.


  • The Admiralty Digital List of Radio Signal (ADRS):
    • Volume 2: Digital and position references for timekeeping and position calculation. This reference allows crews to ensure that they are following the correct route and the correct time.
    • Volume 6: Important maritime radio information for 3,600 locations around the world. Includes information for port operations, pilot services and vessel traffic services.


  • Admiralty TotalTide (ATT): Contains tidal height and stream predictions for over 7,000 ports and 3,000 tidal stream locations around the world, making it one of the most exhaustive and comprehensive sources of tidal information available.


Advantages of Digital Applications

The easy-to-use, intuitive interface of the ADPs combined with powerful search functionality allows crews to access information in a pleasant, efficient manner. Regular updates allow crews to receive changing information on an expedited basis as well. Crews who have access to all available information are afforded the opportunity to make thoroughly considered decisions.


Mariners may purchase licenses for only ADPs that they require, so that they may be individually installed, operated and updated. Licenses allow crews may make one working copy per ship so that each publications may be shared by separate computers (including one with an independent power supply) to comply with SOLAS carriage provisions.


Overlays to Support Voyage Planning

A growing number of back-of-bridge software providers provide support for the Admiralty e-Planning Station, which enables users to view ADPs in a window overlaid on official charts.


Helping Prepare For Digital Navigation

Many maritime shippers are making the move from paper-based to digital. ADPs are the perfect starting point for crews making the transition from traditional paper charts and publications to more modern electronic alternatives.



Almost all ships operating today have flag state approval to use ADP. Given that ADP provides the same information, with improved access and reference tools, they are seen as meeting the standards as paper publications by almost all flag states. Inspection teams appreciate the ease of which they may check the library and most recent updates in a simple, streamlined process.


Those concerned with approval from their flag state may contact them directly or consult the list of flag states which have provided approval or guidance to the UKHO.


Quality-Assured Information You Can Trust

The UKHO is the world's leading hydrographic body and is renowned for its quality assurance standards. Admiralty Digital Publications are exact digital replications of physical UKHO publications. The ADP library has been assembled and all information thorough checked for accuracy by a team of leading experts in the hydrographic field.


Fast and Efficient Updates

Updates are available electronically, by e-mail, download or shipped CD. Traditional publications take a great deal of time to update manually. Introducing errors with manual updates is common as well. Regular electronic updates for ADP and other digital products eliminates many of these concerns.


Global Coverage - More Routes and Ports

ADP products are divided into regions that allow mariners to purchase only the information they require. New licenses may be added as needed, providing flexibility and cost savings.


Admiralty Digital List of Lights (ADLL)



The Admiralty Digital List of Lights is the most complete and comprehensive reference for fog signal and navigational light information in the world. It provides mariners with detailed information on fog signals, lighthouses, floating light marks and lightships across the globe. The ADLL provides in-depth information for more than 70,000 light structures and contains an exact replication of the information contained in the original paper-based edition with the added functionality of regular, weekly updates.

Familiarity and Reassurance

Because the ADLL is an exact replication of the paper publication, users feel confident with information presented to them. The same familiar symbols and legends are used on charts. The layout and format of the ADLL is identical to physical editions.


Compliance with SOLAS Requirements

The ADLL is broadly acknowledged with fulfilling SOLAS convention carriage requirements. Ships which operate under SOLAS convention provisions are safer for crews and face limited scrutiny from inspection authorities.


ADLL Provides: Timely Updates of Essential Light Changes on a Rolling Program

  • Electronic updates are available on a weekly basis through an Internet download, e-mail or CD shipped in the mail. When compared to manually updating paper Notices to Mariners by hand, electronic updates offer a convenient and streamlined solution.


  • Manual updates are prone to human error. This risk is removed when using electronic updates. Additionally, increased time-savings allows crews to spend more time with other important considerations.


  • Numerous search options are available: by location, by text string and by geographic window.



  • Crews may print and export data to allow for providing pre-passage planning, shore based and other operational needs.



Admiralty Digital List of Lights are available for purchase.


Admiralty Digital Radio Signals (ADRS)



Digital radio signals are available in two separate volumes:

  • ADRS Volume 2: provides information regarding digital timekeeping and positioning references mariners may use to fix times and locations.


  • ADRS Volume 6: provides radio communications information for pilot services and port operations globally. Over 3,000 locations are covered.


Global maritime radio communications information.

ADRS allows mariners to meet carriage requirements and provides detailed information covering the management of communications across every passage.


The Admiralty Digital Radio Signals lists are the most thorough and well-researched reference of maritime digital radio signals available today. Volumes 2 and 6 are available from Admiralty in a digital format that features an exact replication of physical editions in a highly usable and functional layout.


ADRS Volume 2 - Positional and Timekeeping References

  • Comprehensive list of VHF radio-finding stations.


  • Global Racon and Ramark radar beacon location listings.


  • Particulars of international radio time signal broadcasts.


  • Operational, known Automatic Identification System (AIS) Aids to Navigation (AtoN) listing.


  • Electronic position fixing system


  • Radio beacons transmitting differential global positioning system DGPS correction listings.


  • International time and dates for both standard and daylight savings time.




ADRS Volume 6 - Pilot Service, VTS and Port Operations

Volume 6 provides in-depth information for over 3,600 locations around the world.


  • Contact information, procedures and details for pilots.


  • Contact information, procedures and details for vessel traffic services (VTS.)


  • Ship reporting systems both internationally and nationally.


  • Contact details, information and procedures for port entry.


  • Weekly electronic updates: available by download, e-mail or CD represent a huge time saving over updating traditional paper-based Notices to Mariners.


  • Efficient, streamlined updates reduce human error.


  • Robust search functionality is included.



The UKHO is expected to be making further volumes of its list of digital radio signals available in the near future.



Admiralty Digital List of Radio Signals are available for purchase.


Admiralty TotalTide (ATT)



The Admiralty TotalTide publication allows crews to calculate whether or not ships may safely clear shallow areas during low tides based on draft, under-keel clearance and masthead heights.


Departures and arrivals in any port are made easier knowing that the tide is working in a ship's favor. The reduced risk to both crew and cargo make the ATT an indispensable reference for mariners and a requirement under SOLAS provisions. Well informed crews have the ability to make better decisions.


Predictions are available for over 7,000 ports and 3,000 tidal stream monitoring locations on a real time basis. Calculations are available instantaneously.


Instant Port Predictions

The Admiralty TotalTide publication provides crews with the ability to calculate tide height for a series of ports for up to seven consecutive days in advance, at the same time.


Improved Situational Awareness

Real-time tidal predictions are updated every 60 seconds and may be overlaid on electronic chart displays providing crews with convenient access to the most up-to-date information possible.


Compliance with SOLAS Requirements

ATT is recognized by most organizations as complying with SOLAS carriage conventions for publications covering tide height, time and streams.


The UKHO maintains a database with over 1 million tidal constants that is updated on an annual basis. Crews that operate using ATT to fulfill carriage requirements must have the most recent updates installed.


Providing Greater Confidence: ATT


  • Calculate safe clearances with confidence: using ships' draft, masthead height and under-keel clearance crews may quickly determine and view safe clearances.


  • Provides for more informed planning: Determines optimum departure and arrival times, provided in a simple-to-use graphical report.


  • Global coverage: Admiralty TotalTide provides mariners with complete, worldwide coverage in a streamlined, easy-to-use solution. Seven-thousand ports and over 3,000 tidal stream locations are covered, around the world.


  • The ATT is the most comprehensive tidal reference available for professional mariners in the world today.




Admiralty Total Tide is available for purchase.