HM Nautical Almanac Office - GOV.UK
Source: http://www.ukho.gov.uk/HMNAO/Pages/Home.aspx
Archived: 2026-04-23 15:18
HM Nautical Almanac Office - GOV.UK
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HM Nautical Almanac Office
Part of
UK Hydrographic Office
Latest from the HM Nautical Almanac Office
Crescent Moon Visibility for March 2026
28 January 2026
Guidance
Crescent Moon Visibility for May 2026
28 January 2026
Guidance
Crescent Moon Visibility for February 2026
28 January 2026
Guidance
See all latest documents
Subscriptions
Get emails
What we do
HM Nautical Almanac Office is a small multi-disciplinary group of specialists whose purpose is to provide solutions to astronomical and celestial navigation problems.
HMNAO
is part of the
UK Hydrographic Office
.
Read more about what we do
Documents
Guidance and regulation
Crescent Moon Visibility for May 2026
28 January 2026
Guidance
Crescent Moon Visibility for March 2026
28 January 2026
Guidance
See all guidance and regulation
News and communications
Total Eclipse of the Moon on 27 July 2018
26 July 2018
News story
Crescent Moon Visibility for Ramadan and Eid al-Fitr 2018
5 April 2018
News story
See all news and communications
Contact HMNAO
HM Nautical Almanac Office
HM Nautical Almanac Office
UK Hydrographic Office
Admiralty Way
Taunton
TA1 2DN
United Kingdom
Email
CustomerServices@UKHO.gov.uk
Taunton office
+44 (0) 1823 484444
Didcot office
+44 (0) 1235 445000
Make a Freedom of Information (FOI) request
Read about the Freedom of Information (FOI) Act and
how to make a request
.
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to see if we’ve already answered your question.
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We’d like to set additional cookies to understand how you use GOV.UK, remember your settings and improve government services.
We also use cookies set by other sites to help us deliver content from their services.
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You can
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at any time.
You have rejected additional cookies.
You can
change your cookie settings
at any time.
View cookies
Skip to main content
HM Nautical Almanac Office
Part of
UK Hydrographic Office
Latest from the HM Nautical Almanac Office
Crescent Moon Visibility for March 2026
28 January 2026
Guidance
Crescent Moon Visibility for May 2026
28 January 2026
Guidance
Crescent Moon Visibility for February 2026
28 January 2026
Guidance
See all latest documents
Subscriptions
Get emails
What we do
HM Nautical Almanac Office is a small multi-disciplinary group of specialists whose purpose is to provide solutions to astronomical and celestial navigation problems.
HMNAO
is part of the
UK Hydrographic Office
.
Read more about what we do
Documents
Guidance and regulation
Crescent Moon Visibility for May 2026
28 January 2026
Guidance
Crescent Moon Visibility for March 2026
28 January 2026
Guidance
See all guidance and regulation
News and communications
Total Eclipse of the Moon on 27 July 2018
26 July 2018
News story
Crescent Moon Visibility for Ramadan and Eid al-Fitr 2018
5 April 2018
News story
See all news and communications
Contact HMNAO
HM Nautical Almanac Office
HM Nautical Almanac Office
UK Hydrographic Office
Admiralty Way
Taunton
TA1 2DN
United Kingdom
CustomerServices@UKHO.gov.uk
Taunton office
+44 (0) 1823 484444
Didcot office
+44 (0) 1235 445000
Make a Freedom of Information (FOI) request
Read about the Freedom of Information (FOI) Act and
how to make a request
.
Check
our previous releases
to see if we’ve already answered your question.
Is this page useful?
Maybe
Thank you for your feedback
Help us improve GOV.UK
To help us improve GOV.UK, we’d like to know more about your visit today.
Please fill in this survey (opens in a new tab
)
.