Which option is NOT part of the Lost Comms procedure?

• A. Make all calls in the blind
• B. Squawk 7600
• C. Transmit on 121.5
• D. Overfly active runway 700' MSL & 70 KIAS

Answer: (C)

The essential idea here is what to do when communications are lost. In a lost-Comms situation you must follow the established clearance sequence and maintain safe flight, with ATC being alerted by the squawk 7600 code. That means you fly the last assigned route, then the expected route, and finally the filed route if you can’t get a reply. You also maintain the highest of your last assigned altitude, the minimum altitude, or the altitude assigned for the approach, and then proceed toward the destination or the approach as appropriate, keeping the procedures and expectations ATC has for your flight. Squawking 7600 is a formal part of this procedure because it signals to air traffic control that radios have failed and you’re proceeding under lost comms.

Transmitting on 121.5, while it is the international emergency/guard frequency, is not a required step in the standard Lost Comms procedure. You would typically try the assigned/appropriate ATC frequencies first and use 121.5 only as an emergency contact if you can’t establish any communication or declare an emergency. So that option is the one that does not belong in the normal Lost Comms sequence. The other elements align with the standard practice of maintaining proper traffic awareness, following the cleared/expected route, and using the proper emergency signaling (squawk 7600) to indicate the radio failure.