Just a note about a great app;

I just found the Android app "Boat Beacon" 

It is a map that shows all commercial vessels (and any vessels with an AIS signal) in real time.  It's like RADAR for $9.99!  Scroll around, zoom....shows your location and a superimposed compass...awesome.

Great reviews...I just downloaded and it's SIMPLE!   See any problems in the fog?  PRICELESS!

I'm looking for a good chart plotting app....