Select the options below for further information:
UK fishing boats
Guernsey Harbours information

Guernsey
Digimap Guernsey Station information
Digimap Map of Coverage from Guernsey

Yagi aerial
Coverage from Guernsey from the yagi uni-directional aerial pointing towards Brest

Sark
Digimap/RES/C&W Sark AIS receiving Station information
Digimap Map of Coverage from Sark

Alderney
Digimap / Sure Alderney AIS receiving Station information
Digimap Map of Coverage from Alderney

Jersey
Digimap Jersey Station information
Digimap Map of Coverage from Jersey

Saint Malo
Saint Malo Station information Map of Coverage from Saint Malo
 
How AIS works
Wikipedia information