Haven't come across this before away from uncontrolled airfields and high level in-flight broadcast areas / war zones etc - where else is this done and found to be useful ?
Personally I find on average I make calls perhaps every 3 - 5 minute .... my calls might be every 2 minutes just in case.
That's a lot of radio time
5 minutes @ 520 kts ..... you and mil jet could be over 50 miles apart when you or it makes a call (3 mins = 30 miles apart)