I have an ACR Nauticast AIS receiver for sale. I bought it a month or two ago when Boris and Roger got theirs and connected it to my Raymarine C-80. It functions perfectly but I found I lost my DCS position data on the VHF. I got a multiplexer and worked to get all the connections right. Same problem. It is not the receiver, it is the C-80 which has only a single NEMA183 port. I paid around $125 and will sell it for $100 and will throw in a good AIS antenna and about 15' of coax. This includes the owner's manual and shipping. I am going to go to a Standard Horizon GX2150. Standard Horizon assures me it will connect to my C-80. PM me if you have interest in the AIS