I've never seen an Apache helicopter on here before. are they normally encrypted? https://globe.adsbexchange.com/?icao=ae74c9
I saw a few Apaches on the east coast. South Carolina or about that area. What bases are they stationed out of? Is there not as many around as there are blackhawks?
Good questions. Do some searching on the intertubes on the base it is circling. You may find a USAA unit associated with testing. The Reg number may indicate that (21-) that this is a new airframe being tested or being delivered to an operational unit. I'm doing a similar "bug hunt" to ID all of the MV-22B's based near me in Hawaii.