U. S. Government Resources
These publications contain all the astronomical data needed for practicing celestial navigation on the sea and in the air, respectively.
Our data service, Celestial Navigation Data for Assumed Position and Time, allows you to obtain all the astronomical information necessary to plot navigational lines of position from observations of the altitudes of celestial bodies.
- The American Practical Navigator ("Bowditch")
- Pub 229: Sight Reduction Tables for Marine Navigation
- Pub 249: Sight Reduction Tables for Air Navigation
and various marine navigation calculators.