Report "I have a 898c software ver.5.5( just updated) just mounted, brand new unit, it wont read the maps,it just shows "loading charts",doesn't matter if I use a card or builtin maps it's the same. the chart select tab is not on this unit or not visibale. I have 2 of the 898c one works and has the tab and the new one doesn't both have ver.5.5 software, I'm I missing something?"