[Scan-DC] 233.75, 249.95, 268.65 & 360.4

[john wilson]

  Since that is an aircraft test facility the comms probably are deliberately
configured that way.

Jeff wrote:

> Folks,
>
> I am fishing for some thoughts on this one. In the past I have heard audio
> on this freq that I have chosen to call "COCKPIT RECORDER". I'll explain:
> Usually the comms seem to be fed from a mic that appears to be constantly
> on. I would not go as far to say it is a HOT MIKE because you can audibly
> hear every little background noise in the cockpit, like the alarms, engine
> noise, you can even hear the voice coming over the radio in the background.
>
> In the past, the only comms I have heard on this one were from the cockpit
> of the FA-18 E/Fs at PAX River undergoing flight test. To the best of my
> knowledge, I personally can't say I have ever heard any other flight test
> program use this type of transmission.
>
> For lack of knowledge on what this is for, over time, through listening I
> have made the following educated guess. I am "assuming" that since Military
> fighters do not have a "Black Box", that they use this to transmit all
> cockpit audio to a voice recorder on the ground for various purposes, just a
> guess.
>
> Some additional detail on it is that I can hear the cockpit talk to "DATA",
> (the flight test coordinator) and I can hear Data's response. Then I can
> hear the pilot switch to PAX ground to advise of engine start-up and hear
> grounds response as well. And it goes this way throughout the test flight. I
> can hear the pilot switching freqs but can hear both sides of audio no
> matter which freq he switched to.
>
> I have several freqs noted for the same type of use at PAX 233.75, 249.95,
> 268.65 & 360.4. Today I had 2 different flight tests doing this on 268.65 &
> 249.95. I have a lot of audio on it and will review again later and take
> notes and repost anything interesting.
>
> Anyway, I was wondering if anyone has ever heard comms like this and might
> be able to offer up some additional thoughts on this from past experience.
> It is kind of neat to listen to because you can listen to all comms from
> beginning to end for a particular flight with on one freq, pretty cool. :-)
>
> Have a good one,
>
> Jeff
>
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