Jumpseat: On Guard

Les Abend

Friday, April 01, 2011 at 05:05 PM ET

Verified

Key Takeaways:

Airline pilots generally monitor guard frequency (121.5 MHz), but practical considerations lead to exceptions, such as below 10,000 feet or when air-to-air communication (123.45 MHz) is prioritized for operational relay in areas like South America.
Beyond accidental transmissions and ATC contact attempts, the primary professional role of guard frequency is to facilitate mutual assistance among aviators during emergencies, with pilots relaying information and offering advice.
The article recounts a suspicious incident where a pilot reporting pitch control issues on guard frequency ultimately parachuted from his aircraft, hinting at potential fraud, yet emphasizes that monitoring 121.5 remains an important professional responsibility for helping fellow pilots.

See a mistake? Contact us.

(March 2011) ON OCCASION, I AM ASKED if we airline types actually monitor guard frequency — 121.5. My stock answer is “Of course.” And for the most part, I’m telling the truth. However, in some circumstances it’s not practical. What are those circumstances?

I don’t want to speak for all my colleagues, but below 10,000 feet agl, which defines the sterile period for most commercial operations, I don’t make guard frequency a priority. Operating below 10,000 feet usually coincides with the terminal arrival or departure process. Chatter on another radio could be a potential distraction.