It is not the E4B Doomsday plane, which I have seen more than a few times. It's at an altitude of about 4000 feet and constantly circling the base in a counter clockwise direction, completing a loop every 5-6 minutes.
trying to log into flight tracking and will link asap, if possible
If it is a military 767, then it is most likely a KC-46 Pegasus tanker. The flight pattern is consistent with refueling ops. Probably student pilots.
no markings anywhere on the plane
no fueling boom out the back
7 hrs?? never seen activity like this right over the base
Unusual for sure. The only variants the US Military has is the KC-46 tanker. Officially that is. But since it was over Patrick Space Force Base, maybe they are testing out a new variant. They had some for the AST program back in the 80s, but those were supposedly scrapped out when the program ended. Who knows?