As a pilot, I always have a handheld aviation tranceiver in my flight bag, to talk to ATC in case the airplane radio goes belly up (30 year old airplanes tend to have 30 year old radios in them). It occurs to me that I might want something more capable for emergency use. I've seen these multi-band tranceivers, but it looks like they only transmit on some of the bands. Is Aviation one of the bands they transmit on? That might be a lot more useful- if I can't raise someone on 121.5 or an ATC freq I know, HAM might be the next try.