They're coming up on when short-range radio should work, when by the regs they should call into ground ATC. (Neither of them really want to call over and over and update probabilities gradually and painfully until suddenly maybe it works or they hear small traces of sound; they have an untrusted plane to fly.)
"Bets?" he says aloud to the Flight Captain. Not onboard-market bets; just between the two of them, this one would be.