E120 Chart options

[SeaPav]

Hello,

I have dual (Command bridge and cabin) 2005 E120's with 2006 2Gb CF Navionics Chart card. I would like to update the charts to the most current. I need west coast of USA and Canada.

I am getting conflicting information on whether the E120 will support cards higher than 2GB. One company says I need to buy Navionics + World map and then selectively load on to a 2GB card. Another company says I can use the Navionics CF update card and update my current charts or purchase the Navionics + CF card for US/Canada which is a 16GB CF card I believe. I also need to know if i need a chart card in each E120 or whether I can just use one card in the master display. Right now I have 2 cards.
I have attached pictures of the chart memory card and unit info.

Thanks very much!