An Interesting Observation

[mateo]

I work in communications for the US Coast Guard. I am an Operations Specialist at the communications area master station for the Pacific area. At my unit, we do everything from fleet communicaitons support, act as the messaging hub for the CG, to monitoring high frequency distress circuits. These distress circuits are part of the Digital Select CAlling (DSC). DSC is a high frequency (HF, 2-30mhz) circuit. We monitor four frecuencies (4000-12000 khz) that allow commercial mariners with HF capabilities to contact the CG for pretty much anything. The predecessor to DSC was SCN (Ship Coordination Network) which also ran off of four freqs ranging from 4000-12000 khz. We scrapped SCN a few months ago and went to DSC. On SCN we monitored 6200khz as our 6mhz freq. On DSC the 6mhz freq is 6215, not much of a difference. Still with me? Yeah this is some dry shit. Go splash some water on your face if your losing me. Anyway, at night, the ionosphere disappears with the absence of the sun, and returns once the sun is shining. The absence of the ionoshere allows for more affective HF communications, and upon it's return during the day, we need to use much higher freqs to punch through the extra interference in the atmoshere. Over the years, I have found that the 6000 khz frequency range is once of the most reliable in bridging the day/night gap in HF communications. Apparently there are others who feel the same way. this is where it gets interesting. At my unit, early in the morning, the radio watchstander (not me now adays. I work more in cryptology and technical maintenance) is treated to a special broadcast from overseas. Most of the people here blow it off as interference, but recently, a colleague and I figured something out. When we monitored SCN, every morning on 6200khz there was a broadcast, obviously from a region of Asia. It was most definately of Chinese/Korean languange. I usually ignored it. After we switched to 6215, it stopped, for a time. Recently it picked up again, but this time we heard something disturbing that we always ignored before. We turned down all the other freqs and turned up our local and Honolulu 6215khz DSC freqs. On this carrier we copied, loud and clear, the national anthem of the People's Republic of China, followed by a female's voice speaking Chinese, and obviously speaking in code. This has been going on for years. Who copies these HF freqs? Commercial freighters. Where do many commercial freighters come from? Asia. What to these commercial freighters often carry? Illegal immigrants (or as I call them, infiltrators and spies). How much of the maritime commercial shipping into America is inspected? Less than 1%. Who poses one of the greatest threats to world peace and American hegemony over the next ten years? China. Draw your own conclusions.

[LorSpi]

mateo said:

I work in communications for the US Coast Guard. I am an Operations Specialist at the communications area master station for the Pacific area. At my unit, we do everything from fleet communications support, act as the messaging hub for the CG, to monitoring high frequency distress circuits. These distress circuits are part of the Digital Select CAlling (DSC). DSC is a high frequency (HF, 2-30mhz) circuit. We monitor four frequencies (4000-12000 khz) that allow commercial mariners with HF capabilities to contact the CG for pretty much anything. The predecessor to DSC was SCN (Ship Coordination Network) which also ran off of four freqs ranging from 4000-12000 khz. We scrapped SCN a few months ago and went to DSC. On SCN we monitored 6200khz as our 6mhz freq. On DSC the 6mhz freq is 6215, not much of a difference. Still with me? Yeah this is some dry shit. Go splash some water on your face if your losing me. Anyway, at night, the ionosphere disappears with the absence of the sun, and returns once the sun is shining. The absence of the ionosphere allows for more affective HF communications, and upon it's return during the day, we need to use much higher freqs to punch through the extra interference in the atmosphere. Over the years, I have found that the 6000 khz frequency range is once of the most reliable in bridging the day/night gap in HF communications. Apparently there are others who feel the same way. this is where it gets interesting. At my unit, early in the morning, the radio watchstander (not me now adays. I work more in cryptology and technical maintenance) is treated to a special broadcast from overseas. Most of the people here blow it off as interference, but recently, a colleague and I figured something out. When we monitored SCN, every morning on 6200khz there was a broadcast, obviously from a region of Asia. It was most definitely of Chinese/Korean language. I usually ignored it. After we switched to 6215, it stopped, for a time. Recently it picked up again, but this time we heard something disturbing that we always ignored before. We turned down all the other freqs and turned up our local and Honolulu 6215khz DSC freqs. On this carrier we copied, loud and clear, the national anthem of the People's Republic of China, followed by a female's voice speaking Chinese, and obviously speaking in code. This has been going on for years. Who copies these HF freqs? Commercial freighters. Where do many commercial freighters come from? Asia. What to these commercial freighters often carry? Illegal immigrants (or as I call them, infiltrators and spies). How much of the maritime commercial shipping into America is inspected? Less than 1%. Who poses one of the greatest threats to world peace and American hegemony over the next ten years? China. Draw your own conclusions.

So I suspect that the folks in DOD are still doing so.

I spent a couple of years with VOA relay stations that also would broadcast HF at night - to China among other destinations. I was in Asia at the time fyi. I know there are paid monitors who listen and record our stuff that we send to corroborate our transmission logs. And I have been copied on some of the other side transmissions that related to the country where I was posted. So - yeah - folks are listening, recording and reporting and forwarding.

Got one for you. My father listened to the transmissions from he first Chinese satellite which included female voice and a series of tones. He swore that he heard those very same tones later - the "signal" used in ET. That's one of my projects - to track down an original recording of that transmission and see if he was right.

[mateo]

lorspi said:

mateo said:

I work in communications for the US Coast Guard. I am an Operations Specialist at the communications area master station for the Pacific area. At my unit, we do everything from fleet communications support, act as the messaging hub for the CG, to monitoring high frequency distress circuits. These distress circuits are part of the Digital Select CAlling (DSC). DSC is a high frequency (HF, 2-30mhz) circuit. We monitor four frequencies (4000-12000 khz) that allow commercial mariners with HF capabilities to contact the CG for pretty much anything. The predecessor to DSC was SCN (Ship Coordination Network) which also ran off of four freqs ranging from 4000-12000 khz. We scrapped SCN a few months ago and went to DSC. On SCN we monitored 6200khz as our 6mhz freq. On DSC the 6mhz freq is 6215, not much of a difference. Still with me? Yeah this is some dry shit. Go splash some water on your face if your losing me. Anyway, at night, the ionosphere disappears with the absence of the sun, and returns once the sun is shining. The absence of the ionosphere allows for more affective HF communications, and upon it's return during the day, we need to use much higher freqs to punch through the extra interference in the atmosphere. Over the years, I have found that the 6000 khz frequency range is once of the most reliable in bridging the day/night gap in HF communications. Apparently there are others who feel the same way. this is where it gets interesting. At my unit, early in the morning, the radio watchstander (not me now adays. I work more in cryptology and technical maintenance) is treated to a special broadcast from overseas. Most of the people here blow it off as interference, but recently, a colleague and I figured something out. When we monitored SCN, every morning on 6200khz there was a broadcast, obviously from a region of Asia. It was most definitely of Chinese/Korean language. I usually ignored it. After we switched to 6215, it stopped, for a time. Recently it picked up again, but this time we heard something disturbing that we always ignored before. We turned down all the other freqs and turned up our local and Honolulu 6215khz DSC freqs. On this carrier we copied, loud and clear, the national anthem of the People's Republic of China, followed by a female's voice speaking Chinese, and obviously speaking in code. This has been going on for years. Who copies these HF freqs? Commercial freighters. Where do many commercial freighters come from? Asia. What to these commercial freighters often carry? Illegal immigrants (or as I call them, infiltrators and spies). How much of the maritime commercial shipping into America is inspected? Less than 1%. Who poses one of the greatest threats to world peace and American hegemony over the next ten years? China. Draw your own conclusions.

So I suspect that the folks in DOD are still doing so.

I spent a couple of years with VOA relay stations that also would broadcast HF at night - to China among other destinations. I was in Asia at the time fyi. I know there are paid monitors who listen and record our stuff that we send to corroborate our transmission logs. And I have been copied on some of the other side transmissions that related to the country where I was posted. So - yeah - folks are listening, recording and reporting and forwarding.

Got one for you. My father listened to the transmissions from he first Chinese satellite which included female voice and a series of tones. He swore that he heard those very same tones later - the "signal" used in ET. That's one of my projects - to track down an original recording of that transmission and see if he was right.

I'm sure the NSA, DIA etc. monitor the same transmissions I hear everyday. What I found interesting is that when we shifted from 6200khz to 6215khz, the radio broadcasts out of CHina stopped. It too a couple of months, but eventually the same thing started again on 6215khz. This tells me that whoever is using this freq for their own purposes could be using code to gaint eh posissions of Coast Guard and Navy ships in the pacific area, ships that could potentially board Asian frieghters carrying infiltrators or illegal contraband, like weapons.

[LorSpi]

But I think frequency shifts are also due to the time of year. I know we would regularly shift frequencies in order to get the better penetration.

Have you seen this www.monitoringtimes.com/ The hard copy was a regular subscription for VOA folks.

[mateo]

lorspi said:

But I think frequency shifts are also due to the time of year. I know we would regularly shift frequencies in order to get the better penetration.

Have you seen this www.monitoringtimes.com/ The hard copy was a regular subscription for VOA folks.

We'll shift freqs from time to time. I just find it odd that they chose the 6mhz freq thst the CG uses.

[LorSpi]

mateo said:

lorspi said:

But I think frequency shifts are also due to the time of year. I know we would regularly shift frequencies in order to get the better penetration.

Have you seen this www.monitoringtimes.com/ The hard copy was a regular subscription for VOA folks.

We'll shift freqs from time to time. I just find it odd that they chose the 6mhz freq thst the CG uses.

Would they be capable of interfering or jamming your signal? That would have been my first guess.

[mateo]

lorspi said:

mateo said:

We'll shift freqs from time to time. I just find it odd that they chose the 6mhz freq thst the CG uses.

Would they be capable of interfering or jamming your signal? That would have been my first guess.

They're interfering by broadcasting on it. I think I need to be more specific about this. I doubt the Chinese could give a fig about jamming our guard freqs. They know that mariners are listening on those freqs and so they know they can communicate. China's dangerous. Scew the Middle East. My eyes are on Asia.

[Merceditas]

lorspi said:

Got one for you. My father listened to the transmissions from he first Chinese satellite which included female voice and a series of tones. He swore that he heard those very same tones later - the "signal" used in ET. That's one of my projects - to track down an original recording of that transmission and see if he was right.

Now that I'd like to hear about if you find out, Lor.