Here's another strange one. On Sunday morning I caught what sounded like many people constantly transmitting over each another on 13545 USB. Not really sure who they are or what purpose. This activity went on for a good amount of time often without any breaks.
Audio: HDSDR_20110522_082750Z_13545kHz_AF.mp3
Audio: HDSDR_20110522_082750Z_13545kHz_AF.mp3