Reference and Plotting Charts | ADMIRALTY

Marine APIs - Develop a solution using ADMIRALTY APIs

Seabed mapping data - Access bathymetry from UKHO

News and insights | ADMIRALTY

ADMIRALTY Chart Availability List | ADMIRALTY

ADMIRALTY Digital Publications | ADMIRALTY

ADMIRALTY Digital Catalogue (ADC)

ADMIRALTY Maritime Data Solutions

Access Data

First time visit: View without clicking anything

All `id` attributes on a page must be unique, or accessible technologies used by the page 
can stop working.

## Example

The duplicate `id` here makes it unclear which label belongs to which input field:

```html
<label for="name">Your name</label>
<input id="name">

<label for="name">Company name</label>
<input id="name">
```

As a result, accessible technologies like screen readers can fail to read out the 
correct text, or may read out no text at all.

Similar issues can occur when using `aria-labelledby` and `aria-describedby`.

## How to fix

Ensure all `id` attributes on a page are unique. 

## More information

See [Technique H93](https://www.w3.org/TR/2016/NOTE-WCAG20-TECHS-20161007/H93) 
for more information.

duplicate-id

June 2025

May 2025

Admiralty

Title / URL	Issues
Reference and Plotting Charts \| ADMIRALTYwww.admiralty.co.uk/charts/reference-and-plotting	4
Marine APIs - Develop a solution using ADMIRALTY APIswww.admiralty.co.uk/access-data/apis	2
Seabed mapping data - Access bathymetry from UKHOwww.admiralty.co.uk/access-data/seabed-mapping	2
News and insights \| ADMIRALTYwww.admiralty.co.uk/news	2
ADMIRALTY Chart Availability List \| ADMIRALTYwww.admiralty.co.uk/charts/chart-availability-list	2
ADMIRALTY Digital Publications \| ADMIRALTYwww.admiralty.co.uk/publications/admiralty-digital-publications	2
ADMIRALTY Digital Catalogue (ADC)www.admiralty.co.uk/publications/admiralty-digital-catalogue	2
ADMIRALTY Maritime Data Solutionswww.admiralty.co.uk/	2
Access Datawww.admiralty.co.uk/access-data	2
First time visit: View without clicking anythingwww.admiralty.co.uk/	2

Fix duplicate IDs

Admiralty

Where this issue has occurred