This page will provide a focus for information, issues, updates and bug fixes relating to NavPac, HMNAO's astro-navigation software package for the PC under the Microsoft Windows™ operating system.
NavPac 3.1.6 is the original version of the software released on CD with NavPac and Compact Data 2011-2015.
The latest version of the NavPac executable file available for download to registered users is version 3.1.9. Please check the Software Status page for information on updates and bug fixes.
NOTE: The status page was last updated on March 11th 2013 to include a procedure for downloading a corrected star magnitudes file.
If you have any problems with the NavPac software or wish to report an error, please e-mail HMNAO.
The new edition of NavPac with almanac data covering the period from 1986 to 2015 will be issued with a serial number. You can add or remove the registration of your copy of the software by providing your e-mail address and serial number which will allow HMNAO to advise you of updates and bug fixes to the software as and when they become available.