How to submit Hydrographic Notes
If you have navigationally significant information to share with the UKHO, please complete the relevant Hydrographic Note form below and email it to your completed form to: sdr@ukho.gov.uk.
Alternatively a paper form can be completed and sent to the UKHO via fax or post to:
Source Data Receipt, UK Hydrographic Office
Admiralty Way
Taunton
Somerset
TA12DN
Fax: +44 (0)1823 322352
Once we’ve received and processed your data, we’ll acknowledge receipt of it by post or email.
Hydrographic notes forms |
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Hydrographic notes forms |
Hydrographic notes forms |
What to include in Hydrographic Note submissions
The Hydrographic Note forms contain information to help you complete any submission. Please note that you should also contact the originating hydrographic office when navigating on IMO-approved, non-ADMIRALTY nautical charts. These details are also included within Chapter 4 of the Mariner's Handbook (NP100).
Supporting images
To help us clarify your report, you can send accompanying chart images and photographs via email or with the hard copy of your completed Hydrographic Notes form.
We accept images in any format. Those most commonly used are JPEG, TIF and AutoCAD. File sizes of the Hydrographic Notes range from approximately 61Kb to 70Kb; however the size of a returned email would depend on any additional attachments that have been made.
Emergency information
For emergency information affecting safety of life at sea, please forward directly to: navwarnings@ukho.gov.uk
Alternatively, contact T: +44 (0)1823 353448 (direct line) or F: +44 (0)1823 322352.
ADMIRALTY H-Note App
The ADMIRALTY H-Note App helps you to send the UKHO reports on suspected dangers to navigation or changes observed in aids to navigation using a mobile device. Free to download and easy to use, the application takes advantage of your mobile’s built-in camera and GPS to help gather important navigational information and to email it to the UKHO once your vessel is in a Wi-Fi or cellular coverage area.
When you submit an H-Note via the App, you will receive an acknowledgement. The information you send will be used by the UKHO to take immediate action or considered for use in the next appropriate revision of a chart or publication.
Retirement of the ADMIRALTY H-Note App
The UKHO will be retiring the ADMIRALTY H-Note App on 29 March 2024. Please use process outlined above to send us any navigationally significant information.