[GreenKeys] Strange RTTY Signal on 29.684

[Geoff Fors]

Out here in central California we are picking up a Baudot RTTY signal on
29.684 MHz which runs 24 hours a day, 7 days per week, continuously.  It
appears to be encrypted.  It's coming in on ground wave as the signal is
about the same strength, day or night.  I haven't taken a look at the signal
yet as far as speed, shift, etc..

Anybody have a suggestion what this might be?  10 Meters is an exclusive
authorization, not a shared band, so it shouldn't be anything commercial.  I
am guessing it's some sort of military use, although how much Baudot gear
would the military still be using these days?

Geoff
WB6NVH