NavPac software enables navigators to compute their position at sea using celestial navigation. It provides methods for calculating the positions of the Sun, Moon, planets and stars to a consistent precision, with the aid of a pocket calculator, personal computer or laptop.
This software package also includes features designed to make celestial navigation easier, including:
Functions for calculating great circle and rhumb line tracks, and rise and set times of celestial objects
Tools for determining altitudes and azimuths
'Find next phenomena' functionality
Additional plotting options
NavPac is used worldwide by the Royal Navy and by many navigators who require an independent means of navigation.