Most of the discussion I’ve seen related to arranging for a retrieve
after a remote land-out has focused on either cell phone (often not
available), text message (slightly better than cell phone), or
satellite-based like ELB, PLB, & SPOT (only one-way, no confirmation
your message was received).

I’m wondering about the practicality of getting an aircraft radio
relay. In other words, making an (emergency?) call on common
frequencies to establish contact with a private or commercial flight,
with the request to relay the information to your intended contact by
radio or phone. Not something to do on a regular basis, but possibly
when other methods fail or are not available. This would obviously be
dependent on the position and willingness of airborne aircraft, and
the continued operability of your own radio & batteries.

Does anyone have any real-life experience using this method? Or any
input on how the FAA (in the US) might view this strategy?

- Frank