Many thanks to SWLing Post contributor, Dan Hawkins, who writes:
Air traffic bands on VHF is well-known.
Not so well-known are the shortwave (HF) communications networks that must be operated by transoceanic flights.
This is an ARINC station for San Francisco, California. I am located about 70 miles inland from this station. I assume ARINC is using a directional antenna system beamed westward toward the Pacific Ocean.
I recorded this video of an ARINC station late last night for my YouTube channel.
Many thanks, Dan!
I enjoy monitoring air traffic on VHF and often forget that when I’m outside the range of an airport’s tower, I can still hop on HF and often hear international traffic. Thanks again!