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Here is the manual for the 688 ...
http://www.humminbird.com/WorkArea/D...t.aspx?id=3125
You should get satisfactory results at factory defaults ...
Rickie
Crappie.com 2016 Man of the Year
* Member Sponsor
Here is the manual for the 688 ...
http://www.humminbird.com/WorkArea/D...t.aspx?id=3125
You should get satisfactory results at factory defaults ...
Rickie
www.podunkideas.com <--Click here
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