Originally posted by phinubian
Being an X commo guy, anything notable being discussed on military radios or freqs generally (not always the rule) is either on single sideband,
digital or satellite encrypted so unless you can decrypt or have tables trying to monitor any military channels is going to be tough, especially if
its for some purpose of gaining any kind of useable information!

I wasn't going to mention that part. You can still catch HF-GCS in the open for EAM, Mainsail, and Skyking messages. You have no idea what they mean
but they are broadcast in the open on 11175 and 8992 is the secondary freq. The occasional phone patch comes across on this system also under the
Mainsail call sign.
As for other HF military broadcast, you'll need a computer with your radio and programs like Hoka 300-32 or Skysweeper. You'll run into digital
modes under STANAG modems and other digitalized encryption. You can decode the raw data stream but you will still not know what is being said as it is
still encrypted.
This fairly well covers military side of HF. There are VHF and UHF applications for military communication such as aircraft that is both open and
digital modes. Digital side has all kinds of neat programs that do stuff. If a guy was interested, search WACARS and ACARS.