Meaning of SELCAL | Babel Free

Definitions

1. A system for alerting a specific aircraft that a radio station on the ground wishes to communicate with them, via transmitting an aircraft-specific sequence of audio tones over the aircraft's company radio frequency to an automatic decoder on board the aircraft.
   countable, uncountable
2. An alert sent via this system.
   countable

Examples

“Duncan awoke to Li Quan's nudging. “What is a sell⟳ call⟳?” Duncan's brain needed a moment to come⟳ online; sell⟳ call⟳ didn't make⟳ sense⟳. Then he made the connection. A SELCAL was coming through. He jerked the headset off Li Quan's head, donning it in time to hear⟳ the words “hundred Chinese aboard your aircraft.””

CEFR level