USCG federal frequencies

[vocoder]

Does the USCG use their federal band working frequencies in simplex mode or is it a repeater?
Thanks

 

[INDY72]

Mainly on the repeaters, but can go to an direct simplex talkaround. (For the LMR P25 system, also note they do run encryption often....) (ALL theVHF/UHF aircraft, and Maritine are simplex.)

 

[ecps92]

Most of the USCG Freq's [VHF/UHF LMR] are used Simplex.
You may find here-n-there, a District/Sector who might have a Repeater, but it is rare.

The VHF Marine Channels are generally Simplex as well. Again a few exceptions [such as the Boston Harbor Pilots with a Ch.20 Repeater]

Then we have the USCG Aux who have both Simplex channels and a Repeater Pair.

United States Coast Guard - The RadioReference Wiki

Does the USCG use their federal band working frequencies in simplex mode or is it a repeater?
Thanks

 

[N2AL]

On Fort Loudoun Lake in East Tennessee, USCG Millington which is outside Memphis, has the ability to monitor Channel 16. Once that I know of, they triangulated a radio operator to the ricer’s mile marker for rescue services to respond. I doubt Channel 16 uses a repeater, but the Coast Guard has the ability to monitor from 400 miles away, and triangulate locations.

If anyone can provide insight, I would enjoy knowing how it works.

 

[ecps92]

I would google "Rescue 21", there is lots of info on the USCG [formerly known as High Sites] radio system.

Here is one of the better, written documents
continuousWave: Whaler: Reference: Rescue 21 Stations; several sites in Michigan found and documented

On Fort Loudoun Lake in East Tennessee, USCG Millington which is outside Memphis, has the ability to monitor Channel 16. Once that I know of, they triangulated a radio operator to the ricer’s mile marker for rescue services to respond. I doubt Channel 16 uses a repeater, but the Coast Guard has the ability to monitor from 400 miles away, and triangulate locations.

If anyone can provide insight, I would enjoy knowing how it works.

 

[INDY72]

Back to the USCG LMR system... As far as I know, all of the stations in SE US use the repeaters along the Gulf of Mexico, at least when in close to shore and up the MS River. And if there is the slightest chance they are going on an interdiction, they go full Encryption on all chans involved. Not sure if they run this way on the Atlantic side of FL. VHF carries a long, long way out over water so even simplex can be picked up a good distance from the unit broadcasting.

 

[cajunjerry]

When ever I am in Hattiesburg ms.i start heading mobile sector Alabama..not clearly on ch 16..i always thought that was a repeated...Jerry

 

[cajunjerry]

Should be I start hearing mobile

 

[INDY72]

The Maritime CHs use Very High Power Base Stations. 16 is not repeated as far as I know, and it would not be a good idea to do so on that one. The USCG Sector Stations run 100 to 150 Watts on the transmitters, and the towers are around 400 feet tall. .. Same with vessels., 100 watts, aircraft are anywhere from 40 to 100 watts. With the awesome almost constant tropo on the Gulf Coast, and that output and hieght, yeah you would get USCG Mobile or New Orleans pretty often in Hburg!

 

[z31jaime]

Here in florida there is at least 1 1500ft tower for rescue 21

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[ecps92]

Florida itself has ~ 25 RFF sites

Not all are right on the Coast
ie: Deltona and St Cloud are two examples

Here in florida there is at least 1 1500ft tower for rescue 21

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[z31jaime]

Florida itself has ~ 25 RFF sites

Not all are right on the Coast
ie: Deltona and St Cloud are two examples

Correct

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[N2AL]

The Maritime CHs use Very High Power Base Stations. 16 is not repeated as far as I know, and it would not be a good idea to do so on that one. The USCG Sector Stations run 100 to 150 Watts on the transmitters, and the towers are around 400 feet tall. .. Same with vessels., 100 watts, aircraft are anywhere from 40 to 100 watts. With the awesome almost constant tropo on the Gulf Coast, and that output and hieght, yeah you would get USCG Mobile or New Orleans pretty often in Hburg!

That is impressive! Thanks for the knowledge about how their system works!