iNA computes all ephemeris data available in the daily pages of the USNO Nautical Almanac. This information is required when doing astronomical computations for celestial navigation, local noon, sunrise, and others. We recommend using StarPilot which has a built-in Nautical Almanac and will perform all the complex calculations for you.

iNA Digitial Nautical Almanac alternatives

Tide Graph Pro

ezSights Celestial Navigation

Please check out www.ezCelestial.com for a full description of the application and in-app help pages.ezSights is a complete celestial navigation package for the iPhone, iPod touch and iPad. It provides simple interfaces for entering sight parameters, planning the navigational bodies to use and time of day to make the observations, and entering the observations made using a sextant. Integration with iOS data network for setting UTC time from network time using NTP servers.

  • size 26.0 MB

Marinus: boating rules ColRegs / IRPCS / IALA

Marinus ColRegs is not one more app of the navigation rules is the APP of the navigation rules Designed by and for the maritime and nautical people, that resolve your doubts in any moment and anywhere. Is the app indispensable onboard of your sail or power boat Include the next sections: Flags: with every letter and significant. No matter if you are an experienced sailor or a novice, this is your app Any question feel you free to ask to [email protected]

  • size 37.6 MB

Celestial by Navimatics

Celestial is a complete package for celestial navigation on your iPad, iPhone or iPod Touch. It can perform celestial sight reductions, calculate fixes, present them visually, manage sights on multiple trips and assist in sight planning. Visit http://navimatics.com or search for navimatics in the AppStore for additional navigation products.

  • size 14.9 MB

Sight Calc

Sight Calc is a specialized calculator for the that eases the task of calculating sight reductions via the Law of Cosines method. It does not use Nautical Almanac data, so you must first compute LHA (Local Hour Angle) and declination, and determine your approximate latitude. Please report any bugs or suggestions to:[email protected]

  • size 1.5 MB