I have 2 questions about Navionics satellite images. I purchased the Platinum+ #632 for my Humminbird 788ci. The standard nautical chart works perfect, but I can't seem to get the satellite photo overlay to work on my unit. Could it be that the 788ci does not support this option? Next question is about the Navionics app on my iPhone. I can get the satellite overlay for land, but it doesn't work over the water. It actually loads up the water image but is quickly replaced by the blue chart image, except for the land areas, which is actually quite useless. Am I doing something wrong? Thanks for any help I can get.