[Scan-DC] Aviation route frequency -- 129.45 MHz

Charley Armstrong armstrong.c at verizon.net
Wed Apr 8 12:52:28 EDT 2009


123.45 is also a common a-a  freq for pilots flying in formation over  
the US...

CA
Annapolis

On Apr 8, 2009, at 12:02 PM, Steve Thompson wrote:

> This is a superb list of the ARINC freqs, both VHF and HF.  I like to
> listen on HF, especially to the overseas freqs when conditions are  
> good (as
> they soon will be again).
>
> Note the small box on the pacific chart for "PAC Air-to-Air  
> 123.45."  This
> is actually a pilot "chat" frequency and gets quite a lot of use  
> between
> planes when they are out of touch on VHF with ARINC.  They often  
> exchange
> weather and ride info and it's good listening.  Unfortunately,  
> because it's
> only used over the ocean routes, you're dependent on the pilot of your
> United flight leaving Channel 9 in operation when he finishes with
> ATC.  Then it's good listening.  However, on most of my flights, they
> switch Channel 9 to music as soon as they get beyond VHF range of  
> ATC.  Bummer.
>
> I've heard this freq in use over the Atlantic, too.
>
> Seems to me, based on recent flights, that fewer pilots are making  
> Channel
> 9 available.  When asked (through the flight attendant, of course),  
> they
> say that there's a malfunction.  I've seen reference to this being a  
> minor
> protest by United pilots who are ticked-off against their employer.
>
> I often fly with a scanner but I have (so far) resisted the  
> temptation to
> snake the headphone cord into my briefcase and monitor my way across  
> the
> country or ocean.
>
> Steve, N4TX
>
>  At 01:52 PM 4/7/2009, Eric C. Carlson wrote:
>> That is the ARINC En Route Service.  Frequencies and coverage maps  
>> may
>> be found here:
>> http://www.arinc.com/products/voice_data_comm/air_ground_radio_svc/jepp_charts.html
>>
>> -Eric
>>
>> On Tue, Apr 7, 2009 at 12:21 PM, Andrew Clegg <w4jecom at w4je.com>  
>> wrote:
>>> A couple of weeks ago I discovered a cool aviation route  
>>> frequency, 129.45
>>> MHz. It is licensed to AIRINC, with a base station at National.  
>>> Planes in
>>> route use this frequency to get phone patches to an aviation  
>>> services
>>> company in San Francisco. It is used for a variety of purposes,  
>>> but one of
>>> the more interesting (and more frequent) uses is to report  
>>> problems with
>>> passengers, such as medical issues. On this frequency, the pilots  
>>> can be
>>> patched through to a company called "Medstat" that has doctors on  
>>> call 24/7
>>> who can talk to the pilot and assess the seriousness of the  
>>> medical issues,
>>> and help decide whether the pilot needs to divert for a quick  
>>> landing or
>>> have paramedics waiting upon a scheduled arrival.
>>>
>>> Over the last two weeks, I have been recording this frequency  
>>> automatically
>>> using Scanrec. I get about one hour or so of activity for each 24  
>>> hours of
>>> recording. From where I am I can hear the base station at  
>>> National, and
>>> usually I can also hear the planes. However, even if you are not  
>>> within
>>> reach of National, you could probably hear the plane side of the
>>> conversation for a couple hundred miles, and it is usually the  
>>> plane side
>>> that is the more interesting ("we are unable to get a pulse;  
>>> passenger is
>>> unconscious;" etc.).
>>>
>>> So far I have heard several serious medical issues, two unruly  
>>> passenger
>>> incidents, and one pilot that was getting worried because his main  
>>> and
>>> alternate airports were both rerouting due to weather and the  
>>> plane's fuel
>>> was running low (they ended up being routed to Allentown PA  
>>> instead of
>>> Boston).
>>>
>>> Anyway, for those who haven't heard this one before, it can be quite
>>> interesting. If you have other specific route frequencies that are  
>>> used for
>>> equally interesting comms, I would be interested to hear about them!
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>
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