Each unit does not have to have their own card if they are linked and it is a newer Navionics card. It sounds to me as it is just a setting that might not be turned on. Let me see if I can get a video or screen shot of what settings to fix, but to m knowledge they both just need to be set to Navionics in the settings and it will share. Be sure that you turn on the fishNChip layer as well when if using a Platinum, Nav+ regions or Nav+ card.
Edited by Corey Stanley (12/18/17 02:35 PM)