I have been using adsbexhange.com to watch aircraft. Because it not filtered or edited at least for now. I have been making a list of med-evac helicopters that are in use of about 150 miles or could appear at hospitals within the radius mentioned. One problem area I have is Air Evac they had a large fleet and like most they are not owned by them. One I have the most trouble with is Air Evac 59 based at Ft. Madison IA. Doing google searches I come up with pictures that do not show the complete registration. The helicopter I have seen in some looks it may of been replaced a few years ago.
