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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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Shortwave Observer

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16,648 görüntüleme • 10 ay önce •via X (Twitter)

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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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🇷🇺RDL - Russian Navy strategic station sending a one-way ciphered message in FSK-Morse mode on 16112kHz. This message was almost certainly also sent on VLF 18.1kHz to submerged submarines. Message: RDL RDL RDL 97552 57623 97552 57623 97552 57623 K RX in 🇮🇹Milan 06:15UTC Sept21
0:55

🇷🇺RDL - Russian Navy strategic station sending a one-way ciphered message in FSK-Morse mode on 16112kHz. This message was almost certainly also sent on VLF 18.1kHz to submerged submarines. Message: RDL RDL RDL 97552 57623 97552 57623 97552 57623 K RX in 🇮🇹Milan 06:15UTC Sept21

Shortwave Observer

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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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VLF (Very Low Frequency) 18.10kHz Wavelength: 16563m 🇷🇺”RDL” Russian Navy strategic broadcast sending encrypted FSK-Morse message to submerged submarines. Rx via 🇳🇱Twente webSDR at 21.58utc Dec18 2024
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VLF (Very Low Frequency) 18.10kHz Wavelength: 16563m 🇷🇺”RDL” Russian Navy strategic broadcast sending encrypted FSK-Morse message to submerged submarines. Rx via 🇳🇱Twente webSDR at 21.58utc Dec18 2024

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🇷🇺Russian Navy RDL. One-way strategic broadcasts to surface units and submerged subs (on VLF 18.1 kHz). MONOLITH message (highest priority) sent at 20:09z. Note the XXX XXX in Morse code at the beginning, indicating highest priority. RX in 🇮🇹Milan July 27 10452kHz T-600 mode
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🇷🇺Russian Navy RDL. One-way strategic broadcasts to surface units and submerged subs (on VLF 18.1 kHz). MONOLITH message (highest priority) sent at 20:09z. Note the XXX XXX in Morse code at the beginning, indicating highest priority. RX in 🇮🇹Milan July 27 10452kHz T-600 mode

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🔥🇷🇺Russian Navy Strategic Broadcast “RDL” sending a T-600 “MONOLITH” (highest priority) message to submarines on VLF 18.1KHz. Note the twice Morse code XXX at the beginning of the transmission, indicating the highest priority. RX via 🇳🇱Twente websdr at 1857z April 16 2024

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🇷🇺Russian Navy’s RDL broadcast daily sends dozens of encrypted messages to surface and submerged strategic assets. The highest priority messages are denoted by the FSK-modulated Morse XXX XXX that is sent at the beginning of the message. Received in 🇮🇹Milan April05 04:45UTC
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🇷🇺Russian Navy’s RDL broadcast daily sends dozens of encrypted messages to surface and submerged strategic assets. The highest priority messages are denoted by the FSK-modulated Morse XXX XXX that is sent at the beginning of the message. Received in 🇮🇹Milan April05 04:45UTC

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🇷🇺Moscow calling the Red October Rus Navy strategic broadcast “RDL” daily sends dozens of ciphered messages to submerged submarines using the Very Low Frequency 18.1kHz, able to penetrate water for a few dozen meters. RX 🇩🇪webSDR 06:26z Sept26 Text: RDL (x3) 90181 81748 (x3) K
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🇷🇺Moscow calling the Red October Rus Navy strategic broadcast “RDL” daily sends dozens of ciphered messages to submerged submarines using the Very Low Frequency 18.1kHz, able to penetrate water for a few dozen meters. RX 🇩🇪webSDR 06:26z Sept26 Text: RDL (x3) 90181 81748 (x3) K

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⚠️🇷🇺The Russian Navy's strategic broadcast "RDL" has just sent, in digital T-600 mode, an highest-priority Flash/Monolith message (Morse code intro XXX XXX), preceded by five U, also in Morse code. Any info about the UUUUU? Received in 🇮🇹Milan at 19:51z July 22 2026 on 10452kHz

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⚠️👀🇷🇺Russia has activated a new RDL Very Low Frequency channel for communications to submerged submarines. VLF 17.9kHz The traditional 18.1 kHz channel remains active, and it appears the same signal is being broadcast on both frequencies. 1/3

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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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🇷🇺⚓️Russian Navy Black Sea Fleet HQ Sevastopol sending a Morse code ⚡️“FLASH” priority message directed to 596E on 10987KHz. Notice the triple “XXX” at the beginning indicating the highest priority. Received in 🇮🇹Milan at 18.27z Aug 04 2024
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🇷🇺⚓️Russian Navy Black Sea Fleet HQ Sevastopol sending a Morse code ⚡️“FLASH” priority message directed to 596E on 10987KHz. Notice the triple “XXX” at the beginning indicating the highest priority. Received in 🇮🇹Milan at 18.27z Aug 04 2024

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🇷🇺Russian Intelligence? Suspected of being linked to the SVR (Russian Foreign Intelligence), M12 is one of the most active Numbers Stations. M12 operates in Morse code. The intro is slow, but the message is sent at high speed. Received in 🇮🇹Milan 19:40z July 23 2026 on 9319kHz
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🇷🇺Russian Intelligence? Suspected of being linked to the SVR (Russian Foreign Intelligence), M12 is one of the most active Numbers Stations. M12 operates in Morse code. The intro is slow, but the message is sent at high speed. Received in 🇮🇹Milan 19:40z July 23 2026 on 9319kHz

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