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HM Nautical Almanac Office: NavPac 4.2

Upgrading to NavPac 4.2

To download the upgrade to the latest version of NavPac version 4.2.0, you must complete the following form. Please provide your original contact e-mail and product key. This form will then provide a link to download the installer to allow you to upgrade to version 4.2.0.

please remember — the product key contains 16 digits, in four blocks of four digits separated by hyphens, as they appear in the original NavPac 4 Installer and can be found by pressing the About button in your existing version of NavPac 4.

1) Please enter your e-mail address twice ...

2) Please enter your NavPac product key twice (including hyphens) ...

Please click on the reCAPTCHA tick box below to identify yourself as a legitimate user before pressing submit. If you do not click on the reCAPTCHA tick box, the contents of this form will not be processed.

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Last modified: Tuesday, 19 April 2022 at 16:56:39 BST