To view the tracks with HumminbirdPC (actually Google Earth) you need to:
1.) Perform an “Export All Nav Data” menu function to an SD memory card that is installed in your Humminbird unit.
2.) Remove SD card and install in your computer.
3.) Start HumminbirdPC and “Download” the data from the SD memory card into HumminbirdPC. This converts the data into a *.GPX file which you can name and save to your computer.
4.) Select the small “+” symbol that shows up when the Nav Data is downloaded to HumminbirdPC.
5.) Select “Tracks” which showed up when you selected the “+” symbol.
6.) Select the track or tracks that you want to see and than select the Google Earth icon at the top of the screen. This is the far right symbol that looks like a round blue and white marble (or at least to me it does).