Today's #USAF High Frequency Global Communications System traffic all seems to be coming from callsign "Sky Chief", and the messages begin with the strange phrase "four quarto".
11175 kHz USB

#HF #HamRadio #AmateurRadio #ShortWave #SWL #HFUnderground #USMIL #Iran

Think more people should know about the Matrix Ham Radio community!

Mike, M0AWS who runs the #matrix space has a nice info dump at: m0aws.co.uk/matrix/

There are rooms for #hf, #vhf, #uhf, #qo100, #satellites and #meshtastic amongst a bunch of others.