[Scan-DC] 4739/4740 khz frequency information?

[Chris Smolinski]

Hi Jay,

I suspect you are hearing the Link-11 system.

>Group,
>
>I have been hearing some form of data on 4739 and 4730 kHz that I
>can't identify. I have it listed as an US Navy frequency. It seems to
>span 2.5 - 3 kHz. It was a chirping sound (wooooop.... wooooop....
>woooop) at regular intervals with what sounded like some type of
>packet data in the background centered around 4739 kHz USB. When I
>flipped to LSB, I just heard the chirps. I have heard it constantly in
>the past couple days whenever I tune to it and am really curious as to
>what data type it is and it's use.
>
>Does anyone on the list know about this frequency?
>
>Thanks much,
>
>Jay

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Chris Smolinski
Black Cat Systems
http://www.blackcatsystems.com