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pan-pan

[pahn-pahn]
noun
  1. an international distress signal used by shore stations to inform a ship, aircraft, etc., of something vital to its safety or to the safety of one of its passengers.
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Sometimes pan [pahn] /pɑn/.

Origin of pan-pan

reduplication and alteration of French panne ‘breakdown, failure’
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018