It's my understanding that the "Encrypt" menu selection under the Setup tab will not show in the Main Menu System until you actually insert a SD Card into the unit ...
Then once the "Encryption" is done go to Humminbird.com, create a Chart Select account (which is different from your actual HB account) ...and follow directions to get the Chart Select download tool on your PC ...
http://www.humminbird.com/uploadedFi...532362-1_A.PDF
A Chart Select account is needed to purchase the single maps thru the website ...
Rickie


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