Static from the radio tuned to 11175 kHz. I am writing and it obscures ambient sounds and is less distracting.
This was interrupted with:
SkyKing, SkyKing, do not answer
Bravo Three November
Authentication ?Delta (?=I didn't catch the letter)
SkyKing messages are Emergency Action Messages (EAMs) specific for all nuclear forces. If the broadcaster screws up and has to do it over again, the time stamp and authentication change.
Mainsail is new, starting this past summer. They previously identified their specific station: Andrews, Offut, McClellan and on rare occasions Hickam. Mainsail used to be a term for pilots wishing to contact any radio station that can hear them.
Based on the total absence of static during the transmission, this one came from McClellan (actually the USN transmitter in Dixon CA USA).
Thus endeth the epistle from the Book of Armaments.