Celestial Navigation is a comprehensive iPhone app developed by Dr. Harald Merkel for Travel & Navigation enthusiasts. This program efficiently handles all the calculations required to reduce a sextant reading to a precise line of position on a map. It provides a perpetual nautical almanac and displays intermediate numbers for verification purposes.

Moreover, Celestial Navigation offers features such as the calculation of azimuth and distance for the line of position, visualization of the line on the map, and a Star Finder that identifies navigational stars by pointing your device skyward. Users can save their readings and customize the map display according to their preferences. Please note that a sextant is essential for optimal utilization of this application.