AIS is what commercial ships use instead of DSC to identify themselves.
If you get connect a Class D VHF radio to a newer chart plotter, you will
see a cursor marking the position of a vessel broadcasting a DSC signal.
Shippers have been doing this with AIS. I recently saw a manufacturer
advertise an add on AIS receiver for about $600. I don't remember what other
equipment you need to display the position information.

"André Langevi" wrote in message
...
Does someone knows what AIS is about and what kind of apparatus is
required
to be able to display commercial trafic on the screen using Fugawi 4 ENC ?


http://207.181.106.97/robin/news_ca_...otation_hr.jpg
AIS - Automatic Identification System Plug in a third party AIS radio
receiver to view commercial vessel traffic directly on top of your ENC or
other chart.