My Humminbird 859 Ci is a 2D and down image model. My down image file plays back as a side imagefile with the down image setting "grayed out and not available. What gives???

Could you please share your sonar log files so that I can take a look? To do this, zip up the Rec*.DAT file along with the sub folder of the same name and all of it's contents, and share using a file sharing service such as WeTransfer to This email address is being protected from spambots. You need JavaScript enabled to view it. .