The Nautical Almanac
The free online Nautical Almanac
The world's most complete source of free celestial navigation information

Everything you need for 2023
Almanacs

2023 Nautical Almanac -regular format

2023 Nautical Almanac- compact format


2023 Sun only -regular format

2023 Sun only -compact format


Increments & Corrections, Altitude Corrections & Polaris Q Corrections

Sight Reduction Tables

  • PUB. NO. 249  Epoch 2020
            (download individual Latitudes or Volumes)     (courtesy of Celestaire) (also known as Ho- 249)

  • PUB. NO. 249  Epoch 2025
            (download individual Latitudes or Volumes)     (courtesy of Celestaire) (also known as Ho- 249)



Stars
Conversion of Arc to Time
Meridian Passage and Declination of the Sun at 12 h UT
     (from The Air Almanac 2023)
Equation of Time curve (for the Sun)


Day of week, Week Number and Day of Year for 2023

ECLIPSES- Solar and Lunar- 2023 

Visibility of Planets, Moon phases and Select Stars
    (from The Air Almanac)

Moon Phases for 2023 in graphic form (GMT/UTC time based)

WORLD MAP OF TIME ZONES


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