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Loggings => Utility => Topic started by: UtilitySeattle on November 27, 2022, 2152 UTC

Title: UNID FEC 16805 USB 21:00 UTC 27 Nov 2022
Post by: UtilitySeattle on November 27, 2022, 2152 UTC
Sea ice warnings and sundry navarea notes in spanish and english. Mention of ARGENTINE HYDROGRAPHIC NAVAL SERVICE and giving a Chilean country code phone and email.

TE: +56-61-2624228/2621273
FAX: +56-61-2621160
E-MAIL__SCPUERTOWIWLLL_STDIRECTEMAR.CL

Puerto Williams is a Chilean Naval base so maybe this is Chilean Military/Coast Guard?

I find no listings for this frequency. Off abruptly at 21:40 UTC
Title: Re: UNID FEC 16805 USB 21:00 UTC 27 Nov 2022
Post by: tiNG on November 28, 2022, 0908 UTC
Hi.

16805,0 kHz is irritating, as you cauhgt an FSK modulated signal. The central frequency for that is 16804,5 kHz and it is a well known DSC-channel in the maritime mobile service.

There are many stations from Chile listed there but I'd guess it is either Antofagasta Zonal Radio (CBA) or Valparaiso Playa Ancha Radio (CBV). A very hot catch could be Bahia Fildes Radio (CBZ22) from the Antarctic (-62.196342, -58.959383 / GC07MT).

Looking on Argentine there are the following stations on 16804,5:

(Source: Admirality LIst of Radio Signals, ITU, IMO GISIS)

On the other hand there is NAVTEX-traffic on 16806,5 kHz but I have no stations from Chile listed there. But from Argentine there are tow entries in my database:


Just a tipp: ALways use the CF for FSK modulated transmissions - that may help to identify the station you caught much more easier.
 ;)

Hope this helps.
Title: Re: UNID FEC 16805 USB 21:00 UTC 27 Nov 2022
Post by: UtilitySeattle on November 28, 2022, 1003 UTC
Yes Thomas very helpful. It was likely L2C as this was NAVTEX at 21:00 hour. 73s


Quote from: tiNG on November 28, 2022, 0908 UTC
Hi.

16805,0 kHz is irritating, as you cauhgt an FSK modulated signal. The central frequency for that is 16804,5 kHz and it is a well known DSC-channel in the maritime mobile service.

There are many stations from Chile listed there but I'd guess it is either Antofagasta Zonal Radio (CBA) or Valparaiso Playa Ancha Radio (CBV). A very hot catch could be Bahia Fildes Radio (CBZ22) from the Antarctic (-62.196342, -58.959383 / GC07MT).

Looking on Argentine there are the following stations on 16804,5:

  • Buenos Aires Prefectura Naval Radio   L2G
  • Mar del Plata Prefectura Naval Radio   L2U
  • Comodoro Rivadavia Prefectura Naval Radio   L3B
  • Ushuaia Prefectura Naval Radio   L3P
  • Argentina Radio   LSD836
(Source: Admirality LIst of Radio Signals, ITU, IMO GISIS)

On the other hand there is NAVTEX-traffic on 16806,5 kHz but I have no stations from Chile listed there. But from Argentine there are tow entries in my database:

  • Buenos Aires Prefectura Naval Radio   L2B / Sending NAVTEX at 1400z
  • Buenos Aires Prefectura Naval Radio   L2C / Sending NAVTEX at 0030,0300,1000,1400,1530,1900,2100 (all times Zulu)

Just a tipp: ALways use the CF for FSK modulated transmissions - that may help to identify the station you caught much more easier.
 ;)

Hope this helps.