Celestial navigation exploits the principle that every measurement taken with a sextant (a 'sight') converts to a line of position on a chart, the intersections of two or more such lines providing a position fix.

Use this offline compatible app to plan/enter sights and inspect the resulting lines of position.

Features -

* The 58 navigational stars of the Nautical Almanac.

* Realtime computed horizon in panoramic projection. Use for star/planet identification, sight preparation, true bearings etc.

* Sight reduction, ephemerides calculated internally

* Lines of position plotted on a pan/zoom grid centered on Assumed Position (intercept method)

* Import sights from companion app Angular Distance (uses camera as sextant)

* Rising/setting almanac

* Lunar distances conversion to Universal Time

Premium Subscription -

All features extended to the sun, moon and planets