[2] [DFN[HM Nautical Almanac Office]] は、[[英国水路部]]の下部組織です。

[1] [CITE@en[HM Nautical Almanac Office - GOV.UK]]
([TIME[2017-04-06 19:11:17 +09:00]])
<https://www.gov.uk/government/organisations/hm-nautical-almanac-office>