Coast Guard National Primary Frequency

[bodnarp]

I think I’ve solved this!

I spent the last few days in Grand Haven and I thought they were saying “switch national primary” every time the station boats called on CH16. However, it was the radio operator compressing his words: he was actually saying “switch and answer on primary.” They then switch to CH21A and/or CG-127 for the Station Grand Haven primary frequency.

Also, they are still using the old VHF channel designations, not the new 10xx numbers.

I’ll post some Coast Guard Festival logs in the forums later this week once I look through everything.

Thanks much for the info

 

[hill]

Group Delaware Bay

Should be Sector Delaware Bay, since Groups haven't been around for many years.

 

[batdude]

I would be most interested in hearing from those of you who monitor the UHF side of the USCG "nets" -
detailed here: Coast Guard (United States) Scanner Frequencies and Radio Frequency Reference

As you can see by the listing, the UHF list has some gaps in it --- I would like to hear from others if any of the "unknown" listings on that page are actually confirmed in use by the Coast Guard - and also Net 421, 422 and 423.


thx!

 

[dlwtrunked]

I was listening to Grand Haven Coast Guard and they told a unit to go to the National Primary Frequency. Anyone know what that frequency is. Thanks

Primary frequencies can be mission dependent and then HF, VHF, or UHF is also selected.

 

[ecps92]

I would be most interested in hearing from those of you who monitor the UHF side of the USCG "nets" -
detailed here: Coast Guard (United States) Scanner Frequencies and Radio Frequency Reference

As you can see by the listing, the UHF list has some gaps in it --- I would like to hear from others if any of the "unknown" listings on that page are actually confirmed in use by the Coast Guard - and also Net 421, 422 and 423.


thx!

Some are in the Wiki

United States Coast Guard - The RadioReference Wiki

wiki.radioreference.com

but since they don't always run in the CLR or use the channel name, much of it is still a work in progress/speculations

Also we have

US Coast Guard VHF/UHF Frequencies

Back in early 2008, the Coast Guard began using new narrow-band radios, capable of APCO P-25 digital mode as well as analog. When the new ...

mt-fedfiles.blogspot.com

 

[Larry51]

I would be most interested in hearing from those of you who monitor the UHF side of the USCG "nets" -
detailed here: Coast Guard (United States) Scanner Frequencies and Radio Frequency Reference

As you can see by the listing, the UHF list has some gaps in it --- I would like to hear from others if any of the "unknown" listings on that page are actually confirmed in use by the Coast Guard - and also Net 421, 422 and 423.


thx!

Here in the Hampton Roads part of Virginia, the only UHF channel I've heard them use was 412.975. It was used by CG Sector Hampton Roads and CG Station Little Creek, and they identified it as "409". The NAC was 293.

 

[devicelab]

I would be most interested in hearing from those of you who monitor the UHF side of the USCG "nets" -
detailed here: Coast Guard (United States) Scanner Frequencies and Radio Frequency Reference

As you can see by the listing, the UHF list has some gaps in it --- I would like to hear from others if any of the "unknown" listings on that page are actually confirmed in use by the Coast Guard - and also Net 421, 422 and 423.

I'm pretty sure 413.2 is a valid USCG NET but up here they heavily use encryption. I've caught USCG RIDs on that channel. I can post some limited [clear] audio later tonight. I called it NET 418 but that's probably wrong.

 

[ecps92]

I'm pretty sure 413.2 is a valid USCG NET but up here they heavily use encryption. I've caught USCG RIDs on that channel. I can post some limited [clear] audio later tonight. I called it NET 418 but that's probably wrong.

??
Since there seems to not be a USCG RID Pattern (like some LARGE Federal Agencies), and the Freq is ENC, how can you be sure Freq/NAC/RID = USCG??

 

[devicelab]

??
Since there seems to not be a USCG RID Pattern (like some LARGE Federal Agencies), and the Freq is ENC, how can you be sure Freq/NAC/RID = USCG??

I don't understand your point. NAC is 293. RIDs from 413.2 match USCG RIDs from other local NET channels. Encryption method is the same. Some clear traffic (but fringey from my specific QTH.) How would you not reach that conclusion?

FWIW, USCG RIDs up here use the same prefix.

 

[devicelab]

USCG NET 403 == 411.8125
USCG NET 404 == 411.8375
USCG NET 405 == 411.8625
USCG NET 406 == 411.8875

NET 403/406 are active here in the Seattle area.

 

[devicelab]

Since there seems to not be a USCG RID Pattern (like some LARGE Federal Agencies), and the Freq is ENC, how can you be sure Freq/NAC/RID = USCG??

Recording 1: Forgot about this one. This pretty much nails it. Looks like it's the San Juan Island/Strait of Juan De Fuca Patrol:

https://www.dropbox.com/scl/fi/x6o5ir1ncgztdiwgadi36/4132-swordfish.mp3?rlkey=dyfr4udvm43dqe0cqlxmh5aoz&raw=1

Feel free to look up USCG Cutter Swordfish...

Recording 2: This is an odd one: https://www.dropbox.com/s/g8wuq17ayg6jgal/413DRILL.mp3?raw=1

 

[batdude]

USCG NET 403 == 411.8125
USCG NET 404 == 411.8375
USCG NET 405 == 411.8625
USCG NET 406 == 411.8875

NET 403/406 are active here in the Seattle area.

those are not in the RR Db - please submit them!

 

[ecps92]

I don't understand your point. NAC is 293. RIDs from 413.2 match USCG RIDs from other local NET channels. Encryption method is the same. Some clear traffic (but fringey from my specific QTH.) How would you not reach that conclusion?

FWIW, USCG RIDs up here use the same prefix.

Around here (New England/NY/NJ) there is no rhym nor reasoning that we have found with the RIDs
and when ENC, it is all assumptions, but the UHF is a rare find up this way , most of the Boats stay VHF, aircraft on UHF (when CLR)

Being $293 (default) unless CLR (which you confirmed via audio) it would be assumptions, since many of the channels are shared

 

[TerryPavlick]

Around here (New England/NY/NJ) there is no rhym nor reasoning that we have found with the RIDs
and when ENC, it is all assumptions, but the UHF is a rare find up this way , most of the Boats stay VHF, aircraft on UHF (when CLR)

Being $293 (default) unless CLR (which you confirmed via audio) it would be assumptions, since many of the channels are shared

Oddly enough - down here in Cape May area - Station Cape May has started using UHF CG409 412.975 for both air and ship comms while Sector Delaware Bay is mostly using VHF for ships and UHF CG409 for air. 90 percent of the Station Cape May comms are in the clear.

 

[devicelab]

Oddly enough - down here in Cape May area - Station Cape May has started using UHF CG409 412.975 for both air and ship comms while Sector Delaware Bay is mostly using VHF for ships and UHF CG409 for air. 90 percent of the Station Cape May comms are in the clear.

For a while it was that way up here too. I caught 401/408 being used by the helos that would fly around the area (and transport from Astoria.) In the past couple of years, I picked up more traffic on the UHF channels. VHF is still primary but UHF usage is increasing.

 

[mshumeyk]

Oddly enough - down here in Cape May area - Station Cape May has started using UHF CG409 412.975 for both air and ship comms

I've found that Station Cape May is also still using VHF CG114 regularly for communications with their small boats. And yes, usually in the clear. Each morning what I assume is the duty boat of the day calls the station for radio checks on CG114, CG409 and marine channel 81. Occasionally they'll switch between CG114 and CG409 for reception issues. Sector Delaware Bay uses CG121 for VHF.
As an aside, the CG Helos have been communicating with REMCS on NJICS Jemstar South Talkgroup 1675, usually arranging practice landings on hospital helipads.

 

[hill]

Down home here in Sector Maryland NCR bosts on CG112. I only heard AIRSTA Atlantic City H65 on CG 409 with helos encrypted and Sector in the clear.

 

[Larry51]

Other than the standard maritime channels, I've monitored CG Sector Virginia using the following frequencies in the Hampton Roads area:

139.9000 Unk Clear voice (in the 1990's this was confirmed as a 5th District training frequency)
163.0500 CG-112 Clear voice
164.3000 CG-114 Clear voice
165.3125 CG-121 Encrypted voice & clear voice heard NAC 293
171.2125 CG-130 Clear voice
171.3625 CG-134 Clear voice (possibly Supply Center Portsmouth?)
406.5625 Unk Clear voice and signaling heard
407.6250 CG-415 Dead carrier multiple times
412.9750 CG-409 Clear voice & encrypted NAC 293