Questions & Answers for: Standard Horizon invalid handle

c card invalid I don't have C-card .what shall I do ?when I can by this card?

integrating AIS, Radar, Autohelm 7000 and flux gate compass. I'm considering adding to my new Autohelm 7000 (sailboat) the following. Which multiplexor will handle the (Black box) AIS demands as well ...

Screen says c card invalid Your best bet here would be to either head for a marine chandlery that handles these C-Cards and have them plug yours into one of their chartplotters or a vessel nearby that