Marine Navigational Warnings 8350 kHz USB 10350 kHz USB 1235+ UTC 19 Dec 2025

[R4002]

UNID station, English language, giving navigational warnings for locations in the Aegean Sea. 

Tuned in via the Wessex (South West UK) SDR at around 1200 UTC on 19 December 2025.  Broadcast simulcast on 10350 kHz USB and 8350 kHz USB.

Seems to be a continuous loop.  Synthetic female voice.  Signal on 10350kHz 10,350 kHz 10.350 MHz USB is quite good.  8350kHz 8,350 kHz 8.350MHz is readable but weaker. 

"Navigation Warning Number xxxx" for "May the 17th" "Please keep clear of the center area" (more coordinates given)

35.479444 N (given in degrees minutes seconds notation) 35 28 46 North
24.171111 E (given in degrees minutes seconds notation) 24 10 16 East

Continues on and on...discussion of fishing boat operations, laying of marine cables, military training areas and other navigational information.  Switching back and forth between navigational warnings and marine weather broadcasts.

Does anybody have an ID for this station?  It seems to be a Greek HF marine broadcast, could possibly be based out of another location in the Mediterranean Sea area...perhaps Turkey? 

At 1230 UTC I switched back and forth between 8350 USB and 10350 USB and both broadcasts were going strong.  Did the same at 1235 UTC.  10350.0 USB is considerably stronger now. 

I haven't heard any station ID, and the lat/long locations were read very quickly.  At around 1210 or 1215 UTC, some minor QRM appeared on 8350 USB but I was still able to copy most of the traffic. 

I checked this link - https://www.hfunderground.com/wiki/Maritime_Weather_Transmissions


Some more research indicates there's a network of VHF marine, MF marine (SSB voice), HF marine (SSB voice), plus SATCOM and MF NAVTEX based warnings broadcast networks.    Olympia Radio simulcast (rebroadcast?) via the stations listed below. 

Kerykra Radio (Corfu)
Limnos Radio
Irakleio Radio

Both signals were going strong when I tuned out at around 1245 UTC.

Any IDs would be greatly appreciated, the synthetic voice was not the easiest to understand, despite the very good signal on 10350kHz.

[tiNG]

Hi.

The same station has been received in Germany with Greek language:

S02: [00:00:00] Προαγγελία, αριθμός 929 του 20. Ιόνιο Πέλαγος, Πατραϊκός Κόλπος. Υπάρξει επικίνδυνο αντικειμένος σε περίπου θέση 38, 10, 29 βόρειο. 21, 30, 58 ανατολικό. Γίνει με το ζωσιπλοίο Αθαλίας και Κυροβολία. Προαγγελία, αριθμός 925 του 20. Η προαγγελία, 17, 61 του 19, κυρώνεται.
S01: [00:00:28] Υπάρξει επικίνδυνο αντικειμένος σε περίπου θέση 40, 37, 29 βόρειο, 24, 34, 22 ανατολικό.
S02: [00:00:40] Λιμενάρια, 40, 37, 25 βόρειο, 24, 34, 27 ανατολικό. Λιμενάρια, Μαρίνα, 40, 36, 29 βόρειο, 24, 36, 21 ανατολικό.
S00: [00:00:57] Ωτος, 40, 36, 20 βόρειο, 24, 36, 23 ανατολικό. Άγιος Αντώνιος, 40, 42, 35 βόρειο, 24, 45, 41 ανατολικό. Ωταμιά, 40, 43, 17 βόρειο, 24, 45, 36 ανατολικό. Χριστία Μουδιάς, διερχόμενα πλοία επικοινωνούν με λιμενικές αρχές σας για λήψη πληροχωριών στο VHF Channel 12.

But I have no details about date and time so far.

[IU4UHT]

Hi!

I heard this station today on 10350 kHz from north Italy (JN54fs)

https://youtu.be/Z___kCr079w?si=LwcxhUSK7b7b5-ta

I recorded IQ file to analyze and find the end of the transmission to catch a callsing or anything useful.

https://drive.google.com/file/d/1DUC4ghG9UCAva3xIxJrXhVwtrlBO2ywh/view?usp=sharing

what I can understand from the audio is: "... This is Olympia(?) Radio..."


let me know what you think.

[tiNG]

Hi.

The station ID's itself really as OLYMPIA RADIO. BUt the frequencies are very unusual.