What technology does ukho.gov.uk use?

ukho.gov.uk is built with PHP, Apache.

Is ukho.gov.uk secure (HTTPS)?

Yes. ukho.gov.uk uses TLS 1.3 with a certificate issued by Amazon, valid until Jan 24, 2027.

Who hosts ukho.gov.uk?

Hosting provider information for ukho.gov.uk is not available yet.

What is ukho.gov.uk's SEO score?

ukho.gov.uk scored 80/100 for SEO in the latest analysis (great).

What is ukho.gov.uk's overall website score?

ukho.gov.uk has an overall SiteGraph score of 77/100, combining SEO, performance, security, and accessibility.

ukho.gov.uk

About The UK Hydrographic Office (UKHO) | ADMIRALTY

Last scanned Jul 26, 2026, 1:49 PM

Overall score

Fair

Summary

The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans. This website uses PHP behind CloudFront CDN. SEO is good (80/100) and accessibility is excellent (100/100). Security scores poor (40/100) and performance excellent (90/100). Top issue: No structured data (JSON-LD) found.

The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans.

Top issues to fix

6 issues found · 2 high priority

Missing Strict-Transport-Security header
Security
Add HSTS so browsers always use HTTPS — this closes the protocol-downgrade attack window.
Missing Content-Security-Policy header
Security
Add a CSP to control which sources can run scripts — the strongest single defense against XSS.
No structured data (JSON-LD) found
SEO
Add JSON-LD (Organization, Article, Product…) to become eligible for rich results.
robots.txt not found
SEO
Publish /robots.txt with a Sitemap: directive to guide crawlers.
sitemap.xml not found
SEO
Publish an XML sitemap and reference it from robots.txt to speed up page discovery.
20 broken links on the page
SEO
Fix or remove broken links — they waste crawl budget and erode user trust.

SEO

3 issue(s) found

Performance

1.77 s

Security

HTTPS & header checks

100

Accessibility

0 issue(s) found

Not enough scan history yet to show a trend — check back after this site has been re-scanned a few more times.

Organization

Company details published in this site's own structured data.

The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans.

LinkedIn YouTube Facebook

Contact

Email, phone, and address published on this site's own pages.

Email: customerservices@ukho.gov.uk
Phone: +44 (0)1823 484444

Meta tags

Title: About The UK Hydrographic Office (UKHO) | ADMIRALTY
Description: The UK Hydrographic Office (UKHO) is a world-leading centre for hydrography, specialising in marine geospatial data to support safe, secure and thriving oceans.
Canonical: https://www.admiralty.co.uk/about-us
Language: en
Charset: utf-8
Viewport: width=device-width, initial-scale=1.0
Robots meta
Manifest: https://www.admiralty.co.uk/site.webmanifest

Technologies

Detected frameworks, languages, and tools.

PHP Apache

Hosting & CDN

Hosting provider: —
CDN provider: CloudFront
IP address: —
ASN: —

DNS records

Type	Value
A	—
AAAA	—
MX	—
TXT	—
NS	—
CAA	—
CNAME	—
IPv6 support	No

TLS / SSL certificate

Version: TLS 1.3
Issuer: Amazon
Subject: www.admiralty.co.uk
Valid from: Jul 11, 2026
Valid to: Jan 24, 2027
Days until expiry: 180
SAN domains: www.admiralty.co.uk, admiralty.co.uk

Security headers

Strict-Transport-SecurityMissing
Content-Security-PolicyMissing
X-Frame-OptionsEnabled
X-Content-Type-OptionsEnabled
Referrer-PolicyMissing
Permissions-PolicyMissing

Compression: none · 0 cookie(s) observed

Content & assets

Headings

H1 1 · H2 29 · H3 0

Links

73 internal · 11 external · 20 broken

Images

7 total · 0 missing alt

Scripts / Styles

9 scripts · 2 stylesheets

JS / CSS size

31.5 KB · 0 B

Page size

128 KB

Robots.txt & Sitemap

robots.txt: Not found
Disallow rules: 0
sitemap.xml: Not found
URLs in sitemap: 0

SEO issues

No structured data (JSON-LD) found
robots.txt not found
sitemap.xml not found

Scan details

Requested URL: https://ukho.gov.uk
Final URL: https://www.admiralty.co.uk/about-us
HTTP status: 200
HTTP version: HTTP/2
Response time: 1.76 s
HTML size: 128 KB
Redirect chain: https://ukho.gov.uk → https://www.ukho.gov.uk/ → https://www.admiralty.co.uk/ukho/ → https://www.admiralty.co.uk/about-us

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