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To upgrade to the latest version of NavPac, namely version 4, you must be a
registered user of NavPac version 3 as supplied with NavPac and Compact Data
2016-2020. Please go to the
Navpac 3 registration page if you have
not already done so.
If you are a registered user, please enter your e-mail address twice ...
and enter your NavPac serial number twice ...