Just curious, which free charts did you download from Sailnet. The only "free" charts I can think of from the Sailnet forums are the PNG versions that are NOT compatible with any software without a lot of work. You really want to get the NOAA BSB
While you can use Raytech, it won't be all that useful with a C-series MFD IMHO. Also, you might find it easier to use SeaClear II, which is free, and use the BSB charts. SeaClear II will not read the newer, vector-based ENC formatted charts, only the older BSB-raster-format charts.
You'll need to setup the computer connection via the NMEA 0183 port on the C80, not the SeaTalk, since SeaTalk is a Raymarine proprietary protocol that most navigation packages can not interpret.
The main differences between the E80 and C80 is best seen in this chart at Raymarine
. BTW, there is a new C-series Widescreen which is half-way between the C-series Classic and the E-series MFDs.
One major difference, the CSCs can only use analog radomes, the CSWs can only use digital radomes, while the ES can use both analog or digital.
Another major difference is that the ES has the ethernet capability and can have multiple displays—with different information on each, the CSCs are only single location, and the CSWs can do dual displays, but IIRC, they're mirrored.
Two minutes with a web browser would have found you this information regarding the differences between the various products at Raymarine's website.
I'd highly recommend you read this POST
to help you get the most out of sailnet. I'd also, highly recommend that you at least do the basics of your own research before asking a question.
Thanks SWESAIL; I have downloaded all of free charts from sailnet already. That will realy save alot of money. Now I am going to get dumb by asking a few quistions. What kind of card are you talking about? Are you talking about a card like C-Chart or Blue-Chart? Or, are you talking about a Memory Card. BTW Is your E-80 pre programed with charts when you bought it? Except money what is the difference in the E-80 and the C-80?