Discover the Celestial Navigator App


The Celestial Navigator is an essential application for mariners and anyone with a keen interest in celestial navigation. This powerful tool is designed to enhance your navigational skills and ensure a safer journey at sea.

Key Features



  • Rise, Set, and Merpass Calculator: Easily calculate the rise, set, and merpass times of celestial bodies.

  • Line of Position and Compass Error: Includes a gyro calculator for accurate readings.

  • Celestial Fix Calculator: Offers auto run-up and dead reckoning capabilities.

  • Comprehensive Almanac: Access data for the sun, moon, planets, and 58 navigational stars.

  • Navigation Methods: Supports the three most widely used navigational methods, including:

    • Intercept

    • Long by Chronometer

    • Latitude by Meridian Altitude



  • True Wind Calculator: Provides wind speed, direction, dew point, and relative humidity.

  • ETA Calculator: Displays multiple results based on user settings.

  • Sailing Calculator: Features great circle and Mercator sailing calculators, plus an intermediate point calculator.

  • GPS Position Display: Shows the device's position (latitude, longitude, speed, and course over ground) along with compass heading.

Accuracy and Testing


The accuracy of the results provided by the Celestial Navigator app has been rigorously tested against the US Navy website and the Nautical Almanac 2013. The results are precise within 10-15 seconds, making it reliable enough for use at sea.

Exporting Data


The app also allows users to export almanac data and celestial observation data to an external SD card for easy access and record-keeping.

Important Note


Please ensure to read the help section carefully to fully utilize the features of the Celestial Navigator app.