In a mutual tracking plan, track-producing units are required to:

In a mutual tracking plan, track-producing units are indeed required to transmit their track data to facilitate correlation. This transmission is crucial as it allows different units to access and share necessary information about tracked entities, leading to a unified and accurate operational picture. By sharing track data, all participating units can effectively correlate their information, ensuring that everyone is aware of the same situational developments, which is key in joint operations.

Transmission of track data also supports collaborative decision-making, enhances interoperability among different platforms, and reduces the chances of misunderstanding or misidentification of tracked objects. Therefore, enabling correlation through data transmission is fundamental to achieving mutual understanding and operational effectiveness during joint operations.

The other options do not support the collaborative nature of mutual tracking. For instance, only reporting local tracks would limit the operational awareness of units beyond the local environment. Avoiding the use of track numbers would create confusion in identifying tracked entities. Lastly, correlating track data without transmission contradicts the very essence of mutual tracking, which relies on shared information to enhance situational awareness.