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

Contact HMNAO

HM Nautical Almanac Office

HM Nautical Almanac Office
UK Hydrographic Office
Admiralty Way


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  1. Read about the Freedom of Information (FOI) Act and how to make a request
  2. Check our previous releases to see if we’ve already answered your question

Corporate information

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