Different industries use various code words, shorthand, and lingo to communicate. The same can be said for aviation.
Frequent flyers have likely heard crew say specific words to indicate a message, but certain phrases are considered more serious than others. According to the travel experts at Wander, hearing ‘Code 300’ or ‘Angel” means there is a deceased passenger on board.
“Terms like ‘Code 300’ or ‘Angel’ are typically used by commercial airlines to discreetly signal a medical emergency onboard, often when a passenger is incapacitated, unresponsive, or in serious distress,” Jason Martinelli, the director of operations at Cirrus Aviation Services, told Travel + Leisure. However, he noted airlines “often have their own internal codes and operating procedure” for these types of scenarios.
“While medical emergency protocols are universally taken seriously across global commercial aviation, the specific terminology, such as ‘Code 300’ or ‘Angel,’ is not fully standardized,” Martinelli added.
Other code words could include “code yellow,” which usually indicates a minor medical incident, “pan-pan,” which indicates a serious, but non life-threatening emergency, and “mermaid,” meant for passengers who purposely sprawl out across empty seats in order to get the row to themselves, according to luxury vacation rental company Wander.
In general, flight crew use coded language to communicate to prevent “unnecessary panic and anxiety” among the passengers on board, said Martinelli, who has more than 30 years of experience in aviation as a pilot.
“Announcing a medical emergency explicitly over the public address system could create fear, confusion, or crowding in the aisle,” he said. “Coded communication allows flight attendants and pilots to coordinate a response calmly and efficiently, while maintaining a composed cabin environment. The goal is to manage the situation discreetly while prioritizing safety and order.”
But, as Martinelli said, using that coded language isn’t necessarily a rule of thumb for all pilots and other members of the flight crew.
David Cox, the director of Acron Aviation Academy, told T+L he flew for airlines and corporate clients for more than 30 years and was not “familiar with codes being used by pilots to communicate with the flight crew over the PA system.”
“Even after the September 11 attacks, we did not have standardized codes or phrases over the PA system,” Cox added.
However, Cox said there were other, subtle ways air crew used to communicate with one another during the flight. “Pilots would mostly use chimes to notify [crew] of situations. You hear these when aircraft pass 10,000 feet, when crew and passengers are notified to prepare for landing and remain seated, and we would use multiple to signify an emergency,” he said. “We also had a knock sequence that the cabin crew knew to enter the cockpit and communicate different situations.”
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