Holy Baloney! I was watching this plane the other day! It was off the West Coast, across from Tampa. I noticed it because it was just a ? mark, then just popped onto the map with no flight path. The weird thing was that it then STAYED IN PLACE as the other planes moved around/passed it. One of the planes took a sudden zig around it. In the final picture the icon for H25B is obscured by the other planes because it is still in the same location. It was around this point I had to get back to work. This was witnessed 12/28 at approx 9:20am PST