[MD Expat in PA]

They were used to train those with specific tasks within the network and to avoid establishing any pattern in time and frequency of messages.

In other words, in your opinion probably part of normal military training and exercises? That’s what is “sounds” like to me. ; )

[centurion316]

Most likely. I haven’t seen any other evidence to suggest otherwise. Those who have nothing to do better than listen to this traffic may have a different opinion, but then you have to ask yourself why they don’t have any thing better to do.