"Lyn & Tony" wrote in
oups.com:

Several base
stations are on the way but that is all.


I think there are some misconceptions that to make a bouy show up on
everyone's AIS it needs to have a transmitter on it. This just isn't true.
ONE shore station with a tall tower can provide the AIS users with every
bouy, every obstruction or any other type of warning from its data stream.
It doesn't matter where its antenna is. This ISN'T some kind of radar
system, it just looks that way on the display. To show up, any object
needs data transmitted in range of your receiver from anyplace. The data,
not the transmitter's location, determines where the object is displayed.