I clearly remember reading of pilots who used broadcast signals as navigation aids. I guess it would depend on the radios installed though. Chances are, bombers carried better radio equipment as radios were big, bulky, and heavy back then (just guessing on that point though).
Someone check my time line, but I think prior to WWII, RDF was used "fairly" commonly in aircraft and it worked off of AM broadcast stations (I think that was common up intil the 50's or 60's on commercial aircraft). So it would be logical to think that some aircraft would have been equipped to pick up broadcast radio stations.
Splitter
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