During last years, waiting to obtain my licence I’ve spent a lot of my “radio-times” listening to broadcast stations and also trying to intercept unknown and strange signals. Monitoring “extra” bands for unknown signals, still give me that taste of misterious that fascinated me so much in past years.

Although in italy the “utility station listening” was not so popular, I’ve been in touch with some friends that were interested in this kind of excercise, expecially, aeronautical and marine listenings.

I do remember that one of the hardest information to obtain were frequency lists of course, and during the early 90′s, some photocopied tables with undeciphrable words and numbers were circulating among shortwave listeners.

Starting in the mid 90′s and the diffusion of the internet those informations become easier to find and more readable.
Today many sources are availbale for scanner enthusiasts, and frequencies are at public domain.
Here you can find some usefull resources.

• Radio Scanning links
• Monitoring Times
• Radio Scanner at wikipedia

I’ve also fond copied of articles originally hosted ad the WUN club, went QRT during this year, that are a bit old but still very interesting.

• Digital signals FAQ

• Government and Military Frequency Lists
• Marine Broadcasts
• Maritime band plan HF
• US Coast Guard Aircraft

  Many more info from old WUN club site, could be retrieved at the wayback machine
  [tags] hamradio, scanning, radio scanning, maritime, shortwave, amateur radio, vhf, ham radio[/tags]