Trivia: Which "One" Does Not Belong In The Following?

Which one is it?

A) "Pan-Pan-Pan"
B) "Mayday"
C) "Panne"
D) "XXX"

Charlie2009-12-19T18:27:53Z

Favorite Answer

C. Panne is not a code word.

Tamby2009-12-19T18:38:57Z

C. 'Panne' is not a call for help or said three times in a row.

EMW2009-12-19T14:33:00Z

c.

The other three are always said three times.