Well, I fly a pretty new CRJ jet, and it still has an ADF in it. They still train us to fly NDB approaches, and the radio is part of the same unit that has the com and nav radios we normally use. Personally, I don't think they will be going away soon. They couldn't take out just the ADF without purchasing a whole new radio, and I don't think that's going to happen. I think they'lle be around for awhile.