I checked the search feature and didn't find one like this, so here goes:
I just bought a new boat which included a Magellan NAV 6510 GPS, which is no longer supported by Magellan, of course. Everything about it seems fine, but it won't zoom in on the map screen. Since everything else seems to work, I want to believe that this is because the system does not have any of the C-map chips with it. True? Or should the system work without the chip? The manual isn't clear on the subject.