I'm positive that several of the systems are linked. TG 201 which I'm fairly sure is the Pentagon Force Protection Agency has come up on several systems which aren't directly related - 001-0101, 00D-0101, 005-0101 and 008-0101, plus the other sites of the 001 system. I have heard it active on the 001 and 00D systems simultaneously.
I've put together a spreadsheet to keep track of everything. One day on the 00D system I was listening to what seemed to be radio techs on TG 115 attempting to do radio checks on JNCR EOC (as they called it) talkgroups, they didn't have any luck with the radios. I've got a bunch of unidentified talkgroups I've logged on all these sites.
Woah! Just as I'm typing this I positvely IDed a TG on the 001 system I've been monitoring tonight. TG 126 is a simulcast of Fairfax County's TG 16848 Mt Vernon dispatch. What tipped me off was the dispatcher calling the unit "Scout-xx1A". Very interesting.
Also tonight on the 008-0101 I heard a fire department unit 'six-six' back in quarters on TG 100, which is the FD TG on the Ft Belvoir 001 system. '66' would be the airfield station. And as I add to this, I locked out TG 126 on the 001 system and it has popped up on the 008 system.
What's odd is that the Uniden TG logging program was logging all hits on the 001 system as being on the 008 system.