This page provides 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 and purchasers of NavPac and Compact Data 2011-2015 is version 3.1.10. Please check the Software Status page for information on updates and bug fixes.
NavPac 3.4.0 is the new version of the software released on CD with NavPac and Compact Data 2016-2020 only.
NOTE: The status page was last updated on May 12th 2015 to advise users of the availability of NavPac 3.4.0 to purchasers of NavPac and Compact Data 2016-2020. There are currently no updates to version 3.4.0 of the software.
If you have any problems with the NavPac software or wish to report an error, please e-mail HMNAO.
The new edition of NavPac released in NavPac and Compact Data 2016-2020 with almanac data covering the period from 1986 to 2020 has been 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.