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ADMIRALTY Digital Radio Signals

Official maritime radio communications information worldwide

Digital Radio Signals
ADMIRALTY Digital Radio Signals

​​​​ADMIRALTY Digital Radio Signals aids ongoing safety, security and compliance by helping bridge crews to manage communications and meet reporting regulations.

Part of the ADMIRALTY Digital Publication (ADP) range, each ADRS volume contains all the detail of its paper equivalents, with the added convenience of fast, accurate weekly updates and simple searching of information. These important features can save bridge crews time and reduce the risk of human error. 

Sold separately, the ADRS range includes:

  • ADMIRALTY Digital Radio Signals Volumes 1, 3, 4, 5 (ADRS 1, 3, 4, 5) - radio communication details for Maritime Radio and Meteorological Observation Stations, Maritime Safety Information Services and GMDSS.

  • ADMIRALTY Digital Radio Signals Volume 2 (ADRS 2) - a range of compliant, digital positional and time keeping references that aid the calculations of positions and times worldwide.

  • ADMIRALTY Radio Signals Volume 6 (ADRS 6) - essential information for 3,800 service locations worldwide, including detailed pilot, Vessel Traffic Service (VTS) and port information.

More features of ADMIRALTY Digital Radio Signals >

​ADRS equivalents in Radio Signals Paper Publications

To help you purchase the most suitable ADRS Areas, you can check the ADRS equivalents in Radio Signals Paper Publications.

ADRS equivalents in Radio Signals Paper Publications >

Here to help

Once you’ve chosen ADRS we can offer you guidance to help you get the most from the service. Support items include installation guides and YouTube tutorials, with further support available from ADMIRALTY Distributors and our in-house customer service team.

Find out more about support for ADRS >


Available around the world

We distribute our products through a global network of experienced and trusted ADMIRALTY Distributors. If you are interested in finding out more about each ADRS application, please contact your preferred distributor or visit the find a distributor page to locate your closest distributor.

Find an ADMIRALTY Distributor >

Maritime radio communications information worldwide

ADMIRALTY Digital Radio Signals is the world's most comprehensive and authoritative source of information on all aspects of radio communications. Sold as three separate applications, ADRS includes:

ADRS 1, 3, 4, 5 - Information to assist bridge crews in routine radio communications, receiving and providing weather reports and safety information, pollution  and quarantine reporting, as well as seeking Telemedical Assistance Services (TMAS). This application also provides detailed procedures in the event of distress or SAR incident.

ADRS 2 - Positional and timekeeping references to aid the calculation of positions and times worldwide. Coverage includes worldwide listings of radar beacons, VHF radio-direction-finding stations, known AIS Aids to Navigation (AtoN), Radio beacons transmitting DGPS corrections, International radio time signal broadcast details and International standard and daylight saving times and dates.

ADRS 6 - Essential information for 3,800 service locations worldwide, including detailed pilot, Vessel Traffic Service (VTS) and port information with their respective contact details and procedures. 


Fast and efficient upd​​ates

All ADRS applications allow users to download weekly electronic updates by Internet or disc. These can be applied accurately with minimum manual intervention; significantly reducing time spent making manual updates and minimising the risk of human error on board. 


Easy search and print ​​options​​

Crews can find radio signal information quickly using the map interface, the ship’s position or a keyword search. This information can then be easily printed​ for use in navigational activities such as passage planning.


Compliance with SOLAS and Flag States

All ADRS applications are widely accepted as meeting SOLAS carriage requirements and are approved for use by the Flag States of over 80% of ships trading internationally; meaning ongoing safety and compliance for your ships, cargo and crew.

View which Flag States have approved the use of ADRS >


Quality assured information you can trust

Produced by the world experts in maritime navigation information, the ADP portfolio has been designed to meet high navigational standards, as well as UKHO's own internal quality assurance processes.​

Approved by the Flag States of over 80% of ships trading internationally, ADRS provides the same level of compliance as traditional ADMIRALTY paper-based publications for ships trading under these Flag States. Where we are aware that a Flag State Authority (FSA) has issued documentation on the acceptance of UKHO's digital nautical publications or provided guidance on their use, we have listed it in the table below. 

Important notes:

  • ​FSAs who accept UKHO's digital nautical publications, but have not issued any specific requirements, may not be listed

  • If it is not clear whether a FSA accepts UKHO's digital nautical publications as satisfying carriage requirements then shipping companies should contact their FSA or the appropriate RO 

  • For more information and guidance on the safe and effe​ctive use of UKHO's digital ​nautical publications, please click here

  • For more information and guidance on IMO requirements on carriage of publications on board ships please read MSC-MEPC.2/C​irc.2​​


​​Flag State​​ADP
​AENP​Documentation where applicable​Comments / Conditions
​(UK) British Virgin Islands

Approval Letter
​(UK) Bermuda

ADP Approval Letter
e-NP Approval Letter
​(UK) Cayman Islands

Supp No 3​​
​(UK) Gibraltar

SGN 052
​(UK) Isle of Man

ADP Approval Letter
e-NP Approval Letter
(​UK) United Kingdom

ADP Approval Letter
e-NP Approval Letter

​Antigua & Barbuda​​SLS.14/Circ​.239​​
​Azerbaijan​​​​​​​​​Approval Letter
​Bahamas​​​​BMA-51, 20 Sept 2011​
​Belgium​​Approval Letter
​Belize​​​​​​Subject to RO approval
​Brazil​​Approval Letters
English | BR Portuguese​

​Canada​​​​Approval Letter
​Cape Verde​
​​Cook Islands​​​​Circ 14​​
​Curaçao​Subject to an independent backup system operating on a separate power supply
​CyprusCirc No 17/11
​Denmark (Dis)/Int'l
​EstoniaApproval Letter
​Faroe Islands01/2011
​Finland ​MMK 11/2007
​France​Approval Letters
English | French
​Relevant section is 221-V/27, on page 389
​Georgia ​Approval Letter


​​Approval Letter
​Hong Kong Hong Kong Circular 7
​IcelandApproval Letter
​Irish Republic
MN No 45/09
​IsraelApproval Letter

Approval Letters                          English | Italian

​JapanApproval Letter
​KiribatiMC 13/2010
​LatviaApproval Letter
​Liberia Approval Letter​
Marine Notice ADM-007 Rev. 5/08
​Lithuania ​Approval Letter
​LuxembourgCAM 06/2012
​MalaysiaMSN 64-2011
​Maldive Islands
​Marshall Islands Marine Notice No. 1-000-3 Rev. 03/16

MN7-041-6 Version 11/12
​When an electronic backup is carried, portions of the publication needed for the planned voyage shall be printed and included with the voyage plan unless the electronic backup is an independent computer system with its own emergency source of power (please refer to the relevant documentation)
​MauritiusApproval Letter
​Mexico​Approval Letters
English | Spanish
​MoldovaApproval Letter
​New Zealand
​PanamaMMC-218​Relevant sections of ADP fully corrected and updated pertaining to the vessels planned voyage should be printed off and be available for reference (please refer to the relevant documentation)
​Papua New Guinea
​PhilippinesApproval Letter
​Poland ​Approval Letter
​Russia​Approval Letters
English | Russian
​Subject to inclusion of the use of ADP in the vessel's safety management system and approval by an appropriate classification society (see attached letter)
​SeychellesApproval Letter
​Sierra LeoneApproval Letter
​Slovenia​Approval Letters
English | Slovenian
​South Africa
​Sri Lanka

Approval Letter
​St Kitts and NevisApproval Letter
​St Vincent and the GrenadinesSOL 008
​Thailand Approval Letter
​Trinidad and Tobago Approval Letter
​Turkey​Approval Letters
English | Turkish
​Please refer to page three of linked documents

Approval letter
​United Arab Emirates
​USAApproval Letter


Below you'll find important information regarding compatibility. If you require further information please contact your ADMIRALTY Distributor

Find your ADMIRALTY Distributor >


Recommended minimum requirements​

Each ADRS application will run on any PC that meets the Microsoft recommended minimum specification for the following operating systems:

  • ​​Windows 7 (SP1) 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor, 1 GB RAM (32-bit) or 2 GB RAM (64-bit), DirectX 9 graphics device with WDDM 1.0 or higher driver​​

  • Windows 8.1 (SP1) 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor, 1 GB RAM (32-bit) or 2 GB RAM (64-bit), DirectX 9 graphics device with WDDM 1.0 or higher driver​

  • Windows 10 1 GHz or faster 32-bit (x86) or 64-bit (x64) processor, 1 GB RAM (32-bit) or 2 GB RAM (64-bit), DirectX 9 graphics device with WDDM 1.0 or higher driver​

Operating systems should have the most recent Service Pack installed. In addition, systems will require: a DVD drive, keyboard, Microsoft mouse (or some other compatible pointing device), super VGA (800 x 600) video adapter or better with suitable monitor and at least 1GB of available disk space. 

Important notes:

  • ​Systems should be capable of receiving emails up to 1.25Mb in size.

  • ADRS and other ADMIRALTY Digital Publications (ADP) can be installed on any standalone computer, which meets the hardware recommendations for the operating system installed

  • ADRS is designed to be registered to individual PCs and is not suitable for use across a network

  • We will not be in a position to support ADP on Operating Systems where Microsoft support has been withdrawn i.e. Microsoft XP​


ADMIRALTY Digital Publications Software Developer Kit (SDK) and Developer's Pack


 ​Our SDK allows you to integrate ADP into your ECDIS or application. You can find out more about the kit and how to access our technical resources on our ADMIRALTY Digital Publications SDK page.

Visit the ADMIRALTY Digital Publications SDK page >

ADP Online ​Updating Service

We supply all ADRS customers with weekly electronic updates via Internet download, email or disc. If you are unable to take advantage of the automatic updating option for ADRS, you can get your updates using our online updating service. On this site you can download and apply updates by area to:

  • ​ADMIRALTY Digital List of Lights

  • ADMIRALTY Digital Radio Signals 1, 3, 4, 5

  • ADMIRALTY Digital Radio Signals 2

  • ​ADMIRALTY Digital Radio Signals 6

  • ​ADMIRALTY TotalTide

Access the ADP​ Online Updating Service >

Below you will find information to support you in your use of the ADMIRALTY Digital Radio Signals, including a user guide and support films.

If you cannot find the answer to your questions, then whom you contact will depend on the nature of your query. Please see who to contact below for more details.


The ADMIRALTY Digital Publications User Guide​​

Includes information on getting started, installation, updates, maintenance, uninstalling and other support topics.

Download the ADP User Guide 


ADMIRALTY Digital Publications Support Film​​s 

Guides to activation, downloading updates, generating a support file and uninstalling ADP are all available on our YouTube channel, ADMIRALTY TV.

View all ADP Support Films 


Download ADP Software

ADP software can be downloaded on our public FTP website using the following login credentials (the username and password details are case sensitive).

URL: FTP://​

Username: ukhopublic

Password: Public12345

How to use the ADP Updates and Software DVD

Includes information on updating your ADP and e-Readers 1.3 and 1.4 applications using the ADP Updates and Software DVD.

Download the guide to update ADP and e-NP applications using the ADP DVD 

ADMIRALTY Digital Publications End User Licence Agreement (EULA)

The terms and conditions for using ADMIRALTY Digital Publications.

Download the ADP End User Licence Agreement 

Who to contact?

In the first instance, please contact the Distributor that you purchased ADRS from. If they are unable to help then the UKHO Customer Services Team can be contacted on or phone +44 (0) 1823 484444.


Each ADRS application is licensed on an annual basis at the following recommended retail prices, with each purchase including a second user licence for backup purposes. Please note that prices do not include VAT and other local taxes.

ADRS 1, 3, 4, 5

Each area: £273​.00

World coverage: £546.00


Each area: £68.20

World coverage: £136.40


Each area: £68.20

World coverage: £613.80


Purchasing options and folio coverage

For precise coverage and voyage flexibility, each ADRS is split into regional folios and one world folio. You can view individual folio coverage for each ADRS below.

View ADRS 1, 3, 4, 5 & ADRS 2 folio coverage >

View ADRS 6 folio coverage >



There are multiple discounts for ADRS customers who:

  • Purchase multiple licences.

  • Purchase additional areas during a particular licence period.

These discounts, which are outlined below, are applicable to any combination of products from the ADMIRALTY Digital Publications portfolio and are applied incrementally as the number of ADP licences a shipping company has reaches each discount threshold. If you require any further information, please contact your ADMIRALTY Distributor.

​​Fleet discount based on the total number of licences held by a single shipping company:

​Number of licences
​0-19th Licence
​20-49th licence
​50-99th licence
​100-199th licence
​200-299th licence
​300-499th licence
​500 or more licences

Discount for additional areas purchased during the licence period:​​

​Elapsed time
​0-3 months
​4-6 months
​7-9 months
​10-12 months

​Choosing, ordering and managing your ADRS Licence​​

We sell each ADRS through an international network of experienced and trusted distributors. Please contact your ADMIRALTY Distributor to discuss the right package of charts for you and the appropriate pricing model.

If you don’t have a preferred distributor, then you can search a list of worldwide ADMIRALTY Distributors on our find an ADMIRALTY Distributor page. ​

Find an ADMIRALTY Distributor >

The ADMIRALTY Digital Catalogue (ADC) can also provide you with a comprehensive and up to date reference of current ADMIRALTY Maritime Data Solutions, with functionality that allows you to search for products by type, scale or a defined route.​​ ​

Find out more about the ADC >