I have an E120 in which I installed the latest Navionics
charts last year. It is essential to ensure the plotter is updated to the latest firmware before using new charts. With the older firmware it kept crashing repeatedly, sometimes every few minutes, and not necessarily at convenient moments. I tried 3 different CF cards for downloading and installing the firmware update and none worked. I ended up buying
a pre-loaded firmware update card for $50 and it worked just like the manual says. After that, no more crashing. Sorry, I don't have a link to where I bought the card, but probably searching for E120 firmware update would find it. Or call RayMarine
You can use the Navionics 16 GB card, but not with the full data set. When I received the card I registered it with Navionics online. To use it in the E120 I had to delete all the data and then select a smaller chart region to download. It's not tiny, but the full card has more data than the E120 can handle. I think I loaded from Norfolk to Nova Scotia
. You can delete the data and select a new region any time you want, but you need available Internet
bandwidth to download 1-2 GB.