A smartphone screenshot showing a dark-themed app or website with text about HFGCS (High Frequency Global Communications System) frequencies. At the top, the time is 11:07, and the battery is full and charging. The heading reads "List of HFGCS Frequencies," and there are bullet points listing: - Lajes Field, Azores - Offutt AFB, NE, USA - Beale AFB (West Coast Global), CA, USA Below, there is a paragraph discussing radio signal strengths in Westmoreland County, mentioning Andrews (MD), Offutt (NE), Croughton (UK), and Lajes (Azores). It explains that strong signals at night are usually from Andrews or Offutt, and that summer conditions might allow signals from the UK or Azores. The next paragraph explains that hearing "practice every five minutes" is likely test counts or network checks, not necessarily an E-4B aircraft. It gives an example of a test count: “This is Mainsail... testing 1-2-3-4-5, 5-4-3-2-1...” and says these are to verify transmitters are synced. It mentions E-4B "Nightwatch" flights use HFGCS but says there’s no evidence that recent activity was tied to an airborne Doomsday plane. The last public E-4B movements were on June 22 and weren’t correlated with mass EAM tests. At the bottom, there is a partially visible section labeled "Message Copilot" with a button labeled "Think Deeper."
When you monitor HFGCS, what frequency do you usually use? I hang out on 4724.
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