This model has two versions, one with the GPS as an external piece, and one with the GPS mounted internally. If the location of the internal mounted GPS cannot get a clear shot at the satellites overhead, it will tell you it cannot get a GPS fix. If it says it is disconnected, you may have a problem with the internal GPS. There are external GPS pucks available for this unit. Here is a helpful website.
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This model has two versions, one with the GPS as an external piece, and one with the GPS mounted internally. If the location of the internal mounted GPS cannot get a clear shot at the satellites overhead, it will tell you it cannot get a GPS fix. If it says it is disconnected, you may have a problem with the internal GPS. There are external GPS pucks available for this unit. Here is a helpful website.
http://www.humminbird.com/leading_innovation/fishing-systems.aspx