Important information about changes to chart presentation

Body

The UKHO is changing how some ADMIRALTY Standard Nautical Charts (SNCs) are produced. As a result, there are some changes to how information is shown on affected charts. 

Some new edition SNCs will now be produced using official ADMIRALTY Electronic Navigational Chart (ENC) data. This means certain chart features may look different from previous editions. 

These charts remain official, safe and compliant. 

Each affected chart will include a reference to this page. Charts without this reference are not affected. 

For full details of the changes, please see the guide below.

What is changing?

Body

Producing SNCs from ENC data results in some differences in how chart information is displayed. Examples include:  

  • Changes to certain symbols or annotations
  • More standardised use of colours and depth tints
  • Updates to how some areas and features are labelled  

The changes relate to chart presentation only. They do not affect the safety, accuracy or compliance of ADMIRALTY SNCs.

Introduction of updated charts

Body

The updated production method will be introduced through New Editions of selected charts.  

Each affected chart will include a reference to this information page, enabling users to understand the changes relevant to that chart. Charts without this reference are not affected.  

Future Notices to Mariners (NMs) will apply to the revised chart in the usual way, ensuring corrections remain straightforward to apply.

Key changes

Body

The section below outlines the principal changes to portrayal and content. Mariners are encouraged to review these changes before using an affected chart. 

In particular, please read the chart notes carefully, as some changes mean that specific notes are no longer referenced directly from individual charted features.

Download the full list of changes

View the full list of changes to ADMIRALTY SNCs.

FAQs

Further information

Body

Below you can find further information about changes to ADMIRALTY Standard Nautical Charts (SNCs).

We are changing how some ADMIRALTY Standard Nautical Charts are produced so they can be created directly from official ENC data. 

This helps make chart production more consistent while keeping charts safe, compliant and up to date. 

The changes relate to how information is shown on the chart. They do not affect safety or compliance.