Marauder Blue 6 said:
I figured as much. I was hoping for an "your uneducated guess is heading in the right direction" or somesuch. They've been pretty visible on ADSBexchange but once they're out in the Gulf, everyone disappears. I just happened to catch one last week using a fake callsign (literally FAKER991) flying north out of Houston so I've been paying closer attention.
It's not a fake callsign, it's just a callsign. Sometimes they're descriptive, sometimes not. OILERxxx is a pretty common one out of Altus for tankers.
IIRC, the E-6 are "Dooomsday" command and control planes. So it's not surprising that they may turn off the transponder and ADS-B. If I'm guessing correctly, their mission is simply to be flying and ready for a crisis. So they're just boring random holes in the sky. They probably don't get as many phone calls to ATC if they fly lazy circles over the Gulf, as compared to over downtown Houston.
EDIT: I just noticed that they were flying at 850 feet. That's pretty darn low, and could be easily seen. Another reason to be maneuvering over open water and not over land where every idiot with a cell phone will call 911.
Another possibility is that they have some sort of tracking/optics, and they're testing them out. Maybe circling a few offshore oil platforms for practice.
I've seen C-130 gunships (Cannon AFB,Clovis) doing their 45-degree-of-bank orbit over our local sewage treatment plant. Cracked me up, but I guess a rectangular lake in the dry Panhandle is a pretty good practice target. Sadly, they didn't open up with the minigun at any geese on the water.