How should interphone messages be concluded?

Concluding interphone messages with operating initials is essential for ensuring clarity and accountability in communication between air traffic controllers and other operational personnel. This practice identifies who is sending the message, allowing for proper attribution of information and instructions given during the communication.

Operating initials serve as a signature of the individual who has conveyed the message, which is particularly important for maintaining an accurate record of communications within busy air traffic control environments. By identifying the controller involved, it enhances the credibility and traceability of the message, ensuring that if further clarification is needed, the right person can be contacted.

Including the position ID, specific message, or a summary may provide helpful information, but it does not fulfill the key requirement of establishing responsibility for the message. It's crucial that interphone communications clearly show who delivered the instruction or information to prevent confusion and potential errors in high-stakes situations.