What frequencies are acceptable to omit when transferring radio communications?

The reason for selecting the option regarding the departure frequency is based on standard aviation communication practices. When transferring radio communications, it is acceptable to omit the departure frequency if it has already been provided to the pilot, or if the frequency is clearly indicated on Standard Instrument Departure (SID) charts. This helps streamline communication and avoids redundancy, ensuring that pilots can focus on the information necessary for a smooth takeoff and departure.

It's important to clear unnecessary communications, especially in busy air traffic environments, to maintain efficiency and avoid overloading pilots with non-essential information. This practice allows for a more organized flow of information, ensuring that critical communications are prioritized.

In contrast, emergency frequencies must always be retained during any communication transfer because they serve a critical function in maintaining safety and responding to emergencies. The Flight Service Station (FSS) frequency is also not one that should be habitually omitted, as it contains important weather and flight planning information. Omission of all ground frequencies without consideration could lead to significant operational disruptions and is not considered an acceptable practice.