Here's Why An E-6B Doomsday Plane Was Flying Tight Circles Off The Jersey Shore Today
https://www.thedrive.com/the-war-zone/31477/heres-why-an-e-6b-doomsday-plane-was-flying-tight-circles-off-the-jersey-shore-today
Very Low Frequency (VLF) - United States Nuclear Forces
https://nuke.fas.org/guide/usa/c3i/vlf.htm