Final answer:
When flying to an airport without a tower, FSS, or operational UNICOM, pilots should self-announce on the MULTICOM frequency 122.9 MHz. This frequency is utilized for communication among aircraft to maintain situational awareness and safety.
Step-by-step explanation:
In the context of aviation communication, a pilot inbound to an airport without an operational tower, Flight Service Station (FSS), or UNICOM should make self-announcements on the MULTICOM frequency 122.9 MHz. This is the standard frequency for pilots to broadcast their intentions when no other station is in operation, ensuring the safety and awareness of all aircraft in the vicinity.
The MULTICOM frequency is essential for pilots to communicate with other aircraft when flying to or from non-towered airports. It's used to announce things like position, altitude, and intentions so that other pilots in the area can maintain situational awareness and avoid conflicts.
The answer to the student's question is that pilots should use 122.9 MHz for MULTICOM frequency communications at such airports.