There is no shortage of Robinson R22s and R44s at Boeing Field. Plenty of flight training takes place there and these types will be on the move on a regular basis. This R44 was coming in one evening when I was over there waiting for a later arrival. What caught my eye was that it was fitted with a boom of some sort. It looked like the sort of thing from which a camera might be mounted. An extension would be needed to bring to camera forward far enough but maybe this was the base of the mount? It was certainly not normal. Anyone know details about this installation?