They should have had a 737 communicating with the sub, tweeting it, at -35755 Feet below sea level - that is the same distance that commercial airlines cruise at.
They would have had the world record for "longest vertical distance between two terrestrial crafts communicating with one another"
I was trying to specify "within atmosphere" meaning it would be the furthest vertical distance two people could communicate from without being in space.
However I now realize that we have flown planes far higher than ~70K feet - which would have been a greater distance that what i was thinking.
They would have had the world record for "longest vertical distance between two terrestrial crafts communicating with one another"