We can find many different intruders in all the amateur radio bands using SSB modulation (ITU classification code of emissions = J3E) modulation for their transmissions. From fishers to CBers ( these last ones, on the 10 m band); from truckers to “village radio” stations (using illegally the amateur bands for communication purposes); from some MIL transmissions to other unidentified pirate stations.

As an example of these transmissions, we show here the transmissions of a group of Spanish fishers on the 40 meters amateur band