6907 kHz USB XFL Calling EWD 6907 USB 2039 UTC 15 Oct 2018

[R4002]

6907 kHz USB 6.907 MHz USB (monitored out of Westminster, MD KiwiSDR online receiver)

Heard XFL calling EWD (both callsigns read using NATO alphabet), XFL heard nothing - "this is X-Ray Foxtrot Lima, nothing heard, out." at 2039 UTC.  Very good signal on XFL.  Possible MARS net or other military?  American accented English.

[MegatonRange]

Those are US Army MARS ALE addresses. 6907.0 is one of a number of USA MARS ALE frequencies.

[R4002]

I had a feeling it was MARS or military in origin.  I've heard data transmissions on 6907 USB in the past so that also makes sense. 

Do you have a list of MARS frequencies in the 6765-7000 kHz range?  I know they use 6968.5 kHz USB as well as the FEMA SHARES frequencies 6765 kHz USB, 6845 kHz USB, 6855 kHz USB and 6910 kHz USB. 

[MegatonRange]

Of course 6765.0, 6845.0 & 6910.0 are primary SHARES Regional frequencies. Since some MARS stations participate in SHARES, you'll hear them there, during SHARES nets. 6910.0 is also a MARS ALE frequency. Other MARS frequencies in the range you asked about, include 6907.0 (already noted), 6818.5, 6850.5, 6913.0, 6968.5 (already noted) & 6996.0. I don't normally follow MARS much except during their national exercises, so I may have missed one or two. 6913.0 may or may not be a current frequency. The last note on it I have was from a couple of years ago. All frequencies are USB. I feel like I'm missing some USAF MARS freqs between 6700.0 & 6800.0, but I'm drawing a blank right now....

[MegatonRange]

I had a feeling it was MARS or military in origin.  I've heard data transmissions on 6907 USB in the past so that also makes sense.

---
I forgot to mention, the data transmissions are generally MIL-STD 188-110A, but it's encrypted almost all of the time.