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🇺🇸US Air Force HF-GCS (High Frequency Global Communications System). Callsign OXIDATION sending a ciphered message (EAM = Emergency Action Message) to ALL STATIONS. Received in 🇮🇹Milan at 03:54UTC Sept24 on HF 4724kHz

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Shortwave Observer

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241,463 次观看 • 10 个月前 •via X (Twitter)

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🇺🇸US Air Force HF-GCS (High Frequency Global Communications System) sending a 48characters EAM (Emergency Action Message) to All Stations. Callsign: STOCKADE Ciphered message: R6TW3OBKPGKZUHPBHXBDHU2FTTDXZLLLQDHUHFTTDGZLFJ2H Received in 🇮🇹Milan 21:31UTC Oct 14 on HF-GCS 4724kHz
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🇺🇸US Air Force HF-GCS (High Frequency Global Communications System) sending a 48characters EAM (Emergency Action Message) to All Stations. Callsign: STOCKADE Ciphered message: R6TW3OBKPGKZUHPBHXBDHU2FTTDXZLLLQDHUHFTTDGZLFJ2H Received in 🇮🇹Milan 21:31UTC Oct 14 on HF-GCS 4724kHz

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🇺🇸US Air Force / Navy / Strategic Command HF-GCS (High Frequency Global Communications System). Sender Callsign: WIRE BARB EAM to: All Stations Ciphered Message: MTFJZPIYLRR5GMSV675WPPRQVFWLMK Received in 🇮🇹Milan on 4724kHz at 04:12 UTC April 02 2026
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🇺🇸US Air Force / Navy / Strategic Command HF-GCS (High Frequency Global Communications System). Sender Callsign: WIRE BARB EAM to: All Stations Ciphered Message: MTFJZPIYLRR5GMSV675WPPRQVFWLMK Received in 🇮🇹Milan on 4724kHz at 04:12 UTC April 02 2026

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🇺🇸US Air Force / US Navy / US Strategic Command HF-GCS (High Frequency Global Communications System) Sender Callsign: PROCLAIM EAM to: All Stations Ciphered message: MTZSCVORLFXVN4M5ZJWPAO4LJCZTU5 Received in 🇮🇹Milan on 4724kHz at 20:35 UTC April 06 2026
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🇺🇸US Air Force / US Navy / US Strategic Command HF-GCS (High Frequency Global Communications System) Sender Callsign: PROCLAIM EAM to: All Stations Ciphered message: MTZSCVORLFXVN4M5ZJWPAO4LJCZTU5 Received in 🇮🇹Milan on 4724kHz at 20:35 UTC April 06 2026

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🇺🇸US Air Force - Navy - Strategic Command HF-GCS “High Frequency Global Communications System”. Message to: All stations Ciphered message: MTCO3UFQJPMMIUQ3BRBBVIFMJIQXUY Received in 🇮🇹Milan at 02:46 UTC April 04 2026
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🇺🇸US Air Force - Navy - Strategic Command HF-GCS “High Frequency Global Communications System”. Message to: All stations Ciphered message: MTCO3UFQJPMMIUQ3BRBBVIFMJIQXUY Received in 🇮🇹Milan at 02:46 UTC April 04 2026

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🇺🇸US Strategic Forces HF-GCS (High Frequency Global Communications System). Callsign: MANDATORY EAM to: ALL STATIONS Message: “I say again C7SYQ3YGI7RWXGLXQC6LE7ZAIQ2YEG this is MANDATORY, OUT” Received in 🇮🇹Milan 4724kHz 22:12UTC July 1 2025
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🇺🇸US Strategic Forces HF-GCS (High Frequency Global Communications System). Callsign: MANDATORY EAM to: ALL STATIONS Message: “I say again C7SYQ3YGI7RWXGLXQC6LE7ZAIQ2YEG this is MANDATORY, OUT” Received in 🇮🇹Milan 4724kHz 22:12UTC July 1 2025

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🇺🇸US Air Force HFGCS (High Frequency Global Communications System). Ciphered 30 characters “EAM” message to all stations. Received in 🇮🇹Milan on HFGCS 4724kHz 21:48UTC Oct 01 2025
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🇺🇸US Air Force HFGCS (High Frequency Global Communications System). Ciphered 30 characters “EAM” message to all stations. Received in 🇮🇹Milan on HFGCS 4724kHz 21:48UTC Oct 01 2025

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🇺🇸US AIR FORCE / NAVY / STRATEGIC COMMAND High Frequency Global Communications System Sender Callsign: SYRACUSE EAM to: ALL STATIONS Ciphered message: 6FFIGSHIEIC6B6CFHDF7QM Received in 🇮🇹Milan at 03:14 UTC April 12 2026
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🇺🇸US AIR FORCE / NAVY / STRATEGIC COMMAND High Frequency Global Communications System Sender Callsign: SYRACUSE EAM to: ALL STATIONS Ciphered message: 6FFIGSHIEIC6B6CFHDF7QM Received in 🇮🇹Milan at 03:14 UTC April 12 2026

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🇺🇸USAF/USN/USSTRATCOM HF-GCS (High Frequency Global Communications System). EAM to: ALL STATIONS Callsign: BAD ALIBI QRG: 4724kHz Received in 🇮🇹Milan, Italy 23:18UTC Nov 28 2025
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🇺🇸USAF/USN/USSTRATCOM HF-GCS (High Frequency Global Communications System). EAM to: ALL STATIONS Callsign: BAD ALIBI QRG: 4724kHz Received in 🇮🇹Milan, Italy 23:18UTC Nov 28 2025

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🇺🇸US Strategic Forces HF-GCS (High Frequency Global Communications System) sending 35 characters EAM to All Stations. The echo you hear is due to the reception of multiple HF-GCS transmitters that are simultaneously broadcasting the message. Received in 🇮🇹Milan 03:53UTC June 22
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🇺🇸US Strategic Forces HF-GCS (High Frequency Global Communications System) sending 35 characters EAM to All Stations. The echo you hear is due to the reception of multiple HF-GCS transmitters that are simultaneously broadcasting the message. Received in 🇮🇹Milan 03:53UTC June 22

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🇺🇸US AIR FORCE / US NAVY / US STRATEGIC COMMAND Callsign: RELIGION EAM to: ALL STATIONS Received in 🇮🇹Milan at 02:22 UTC April 25 2026 on 🇺🇸High Frequency Global Communications System 4724kHz
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🇺🇸US AIR FORCE / US NAVY / US STRATEGIC COMMAND Callsign: RELIGION EAM to: ALL STATIONS Received in 🇮🇹Milan at 02:22 UTC April 25 2026 on 🇺🇸High Frequency Global Communications System 4724kHz

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🇺🇸US STRATEGIC FORCES on HFGCS (High Frequency Global Communications System) EAM to: ALL STATIONS Callsign: 🤷‍♂️ Message of 30 characters: AARSDP7FCIVW6YFL6OJ7AIDUVGMOCE Received in 🇮🇹Milan on 8992kHz HFGCS at 20:28 UTC July 09 2025
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🇺🇸US STRATEGIC FORCES on HFGCS (High Frequency Global Communications System) EAM to: ALL STATIONS Callsign: 🤷‍♂️ Message of 30 characters: AARSDP7FCIVW6YFL6OJ7AIDUVGMOCE Received in 🇮🇹Milan on 8992kHz HFGCS at 20:28 UTC July 09 2025

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🚨🇺🇸 ALERTE INFO : Un message chiffré du système HF‑GCS (High Frequency Global Communications System) destiné à toutes les stations a été capté à Milan à 02:46 UTC le 4 avril 2026. (F)
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🚨🇺🇸 ALERTE INFO : Un message chiffré du système HF‑GCS (High Frequency Global Communications System) destiné à toutes les stations a été capté à Milan à 02:46 UTC le 4 avril 2026. (F)

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🇷🇺Russian Navy - VLF-HF strategic broadcast “RDL” sending an FSK-modulated Morse mode ciphered message on HF 4818kHz. The same message was also sent on Very Low Frequency 18.1kHz to reach submerged submarines. Received in 🇮🇹Milan, Italy 21:39UTC Nov 27 2025
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🇷🇺Russian Navy - VLF-HF strategic broadcast “RDL” sending an FSK-modulated Morse mode ciphered message on HF 4818kHz. The same message was also sent on Very Low Frequency 18.1kHz to reach submerged submarines. Received in 🇮🇹Milan, Italy 21:39UTC Nov 27 2025

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🇷🇺RDL - Russian Navy strategic broadcast - Shore to ships ciphered one-way communications. FSK-modulated Morse on HF 6962kHz. The same message was also sent on Very Low Frequency 18.1kHz to reach submerged submarines. Received in 🇮🇹Milan at 17:43utc Feb 28 2026

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⚠️A few hours ago, at 20:57z and 22:24z on July 21, 🇺🇸US Strategic Command sent two very rare 28-character EAMs on HF Global Communications System. This is the 28-character message sent at 20:57z Received in 🇮🇹Milan with Plessey PR2250 receiver radio and MLA30+ antenna.
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⚠️A few hours ago, at 20:57z and 22:24z on July 21, 🇺🇸US Strategic Command sent two very rare 28-character EAMs on HF Global Communications System. This is the 28-character message sent at 20:57z Received in 🇮🇹Milan with Plessey PR2250 receiver radio and MLA30+ antenna.

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🇹🇼Taipei calling 🕵🏻‍♀️Mandarin-language Taiwanese Numbers Station known as V13 “New Star Broadcasting Station” (新星廣播電臺 Xinxing Guangbo Diantai) sending a ciphered message on HF 11430kHz. Received via 🇵🇭webSDR at 03:06 UTC Feb 26 2026
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🇹🇼Taipei calling 🕵🏻‍♀️Mandarin-language Taiwanese Numbers Station known as V13 “New Star Broadcasting Station” (新星廣播電臺 Xinxing Guangbo Diantai) sending a ciphered message on HF 11430kHz. Received via 🇵🇭webSDR at 03:06 UTC Feb 26 2026

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🇷🇺Russian Navy strategic broadcast “RDL” sends one way ciphered message on 16112kHz. Digital T-600 and FSK-Morse. The same message was sent to submerged submarines on VLF (Very Low Frequency) 18.1kHz Received in 🇮🇹Milan 08:34UTC Oct 18
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🇷🇺Russian Navy strategic broadcast “RDL” sends one way ciphered message on 16112kHz. Digital T-600 and FSK-Morse. The same message was sent to submerged submarines on VLF (Very Low Frequency) 18.1kHz Received in 🇮🇹Milan 08:34UTC Oct 18

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🇷🇺RDL - Russian Navy strategic broadcast from Krasnodar Very Low Frequency transmitter, sending a ciphered message in FSK-Morse on 18.1kHz (wavelength 16563m) to reach submerged submarines. Message: “RDL (x3) 46809 00084 (x3) K” Received via 🇩🇪webSDR Feb 03 2026 21:06z
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🇷🇺RDL - Russian Navy strategic broadcast from Krasnodar Very Low Frequency transmitter, sending a ciphered message in FSK-Morse on 18.1kHz (wavelength 16563m) to reach submerged submarines. Message: “RDL (x3) 46809 00084 (x3) K” Received via 🇩🇪webSDR Feb 03 2026 21:06z

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🇵🇱 Warsaw intelligence Numbers Station “E11” sends encrypted message to agents on HF 9150kHz. Note when the voice says "Attention!" to warn the recipient that the message transmission is starting. The entire broadcast lasted ten minutes. Received in 🇮🇹Milan 06:00UTC June 22
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🇵🇱 Warsaw intelligence Numbers Station “E11” sends encrypted message to agents on HF 9150kHz. Note when the voice says "Attention!" to warn the recipient that the message transmission is starting. The entire broadcast lasted ten minutes. Received in 🇮🇹Milan 06:00UTC June 22

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