HF aircraft frequencies

HudsonScannerGuy · Feb 20, 2018

Does anyone have a good list of all the HF aeronautical frequencies? I have an Eton E5 SSB reciever and I'd like to start listening to HF aircraft. I am in Massachusetts. Are there any region specific HF frequencies?

ATCTech · Feb 20, 2018

Dated, but still quite accurate in terms of frequencies vs region and a good starting point plus being a graphical representation easy to understand:

https://www.hfunderground.com/wiki/MWARA

Romak3 · Feb 20, 2018

I've been using this one.

The Btown Monitoring Post: Civilian Aero/Military HF Frequency List - Update 11 Aug 2017

TRFD · Feb 23, 2018

For your location the WATRS (Western Atlantic Route System) covers the airspace off the east coast of the US down to the Caribbean.

New York Radio-HF 3494 / 6640 / 8933 / 11342 / 17925 / 21964

ka3jjz · Feb 23, 2018

And I wouldn't ignore some of the others as well. There are many in different parts of the world - if traffic starts showing up a lot on an area that's not local to you, you may assume that propagation favors you there. I know several folks that use these, as well as various VOLMET stations, as 'beacons' to see if propagation is working from there

Mike

DaveNF2G · Feb 23, 2018

TRFD said:
For your location the WATRS (Western Atlantic Route System) covers the airspace off the east coast of the US down to the Caribbean.

New York Radio-HF 3494 / 6640 / 8933 / 11342 / 17925 / 21964

To cover that area, one would need to monitor many more frequencies than that. Those are for just one MWARA.

majoco · Feb 23, 2018

Right. Here you go - a text file dated last year when some changes were made. It's a text file but if you copy it onto an xls file it should be arranged better.... You can ignore the last three columns which were to control my SDR. The frequencies are in Hz.

K6PCW · Feb 24, 2018

https://www.rockwellcollins.com/Pro...light-deck-solutions/ARINC-Voice-Service.aspx

Scroll down the page for the frequency maps, which are downloadable in PDF.

HudsonScannerGuy · Feb 24, 2018

Thanks!

Floridasand · Feb 24, 2018

Thanks to all who provided these lists. I used to work at the various Military HF airway stations and also worked aircraft with AIRINC so this is great for me to go back and listen to some of the frequencies that I actually used to talk to aircraft.

Dana
N7UFT

N1SQB · Feb 27, 2018

K6PCW said:
https://www.rockwellcollins.com/Pro...light-deck-solutions/ARINC-Voice-Service.aspx

Scroll down the page for the frequency maps, which are downloadable in PDF.

The Rockwell PDF docs are excellent! Thanks for posting the link...

Manny

majoco · Feb 27, 2018

There's a detailed world chart here...

http://www.ea1uro.com/MapasconFrecuenciasAereas.jpg

...slightly outdated but nearly all of the frequencies are valid. Nice bit of wallpaper if you get it blown up and laminated!

K5MPH · Feb 28, 2018

majoco said:
Right. Here you go - a text file dated last year when some changes were made. It's a text file but if you copy it onto an xls file it should be arranged better.... You can ignore the last three columns which were to control my SDR. The frequencies are in Hz.

I downloaded your list,thanks....

scanmanmi · Mar 2, 2018

Is there anything I can hear in the middle of the US?

ka3jjz · Mar 2, 2018

Perhaps. HF isn't like VHF- it's largely dependent on how the ionosphere and the Sun are interacting. That is a very loose description of what we call propagation - how signals get from point A to point B. It's more than a little OT here, but let me just conclude by giving the general rules (and yes, at times there are exceptions)

a. Listen above 10 Mhz during the day, below this at night
b. For you to have a chance, both you and the target should be on the same side (day or night)
c. The better the receiver and antenna, and the more you understand how this works, the better your chances will be.

C'mon over to the HF Utilities forum if you want more...Mike

majoco · Apr 2, 2018

There is a deal of confusion by some guys I have spoken to about LDOC. They seem to think that LDOC is ATC but it's not. LDOC is a system set up by ARINC to enable US based airline companies to talk to their aircraft via a central office in New York and some other places on a chosen few frequencies.

ATC works on MWARA sites throughout the world and the aircraft are controlled via local HF radio and ATC controllers. If an airline operator wants to talk to one of their aircraft then they have their own selection of frequencies to choose from based in their own country but I guess they can also subscribe to the ARINC LDOC system if they fly into or across the US.

For more clarity about the MWARA frequencies it's all in the Wiki...

https://wiki.radioreference.com/index.php/MWARA#LDOC_-_Long_Distance_Operational_Control

...but straight from the horses mouth, that is ICAO, this doc is all about MWARA in the North Atlantic - absolutely no mention of LDOC...

https://www.liveatc.net/downloads/NAT-HF-Guidance.pdf

autovon · Apr 3, 2018

CPDLC however is reducing the amount of HF aircraft comms out there.

DaveNF2G · Apr 4, 2018

Does anyone have a breakdown of the LDOC HF network in terms of ground station locations and airlines that still use them? I haven't heard a peep on any LDOC frequency in years.

majoco · Apr 4, 2018

Here is a very small sample of a 700kB xls file that I have called "all Aero" - just a couple of frequencies seem to very popular worldwide. If you PM me with your email address I can send you the full list.

ka3jjz · Apr 4, 2018

This list has several LDOCs on it; although I kinda suspect that at least some have moved to secured satellite links...

The Btown Monitoring Post: Civilian Aero/Military HF Frequency List - Update 11 Aug 2017

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