From what I was told Thomas is that you need to go to the Lowrance....(if that is the brand fishfinder you have) and update your unit to the new program by uploading a blank chip with the new program from their website and importing it to your unit and then put in your Navionics chip.....apparently with the new technology...which changes daily.....the unit must be upgraded regularly....still have to attempt mine.

With the new technology and the drive to get out to us consumers befor the compitition does we all must become more computer literate and learn how to do firm ware updates as they constantly are updated.

Now that is what I call team work.

Good job guys,

Russ