Final answer:
The 'monitor' or 'receive only' position on the MXU-835P communication subsystem is designed for listening without transmitting. It is used in military and aviation where clear communication channels are vital.
Step-by-step explanation:
The position on the MXU-835P communication subsystem that is listen only is typically referred to as the 'monitor' or 'receive only' position. Such positions are designed to allow users to receive communications without the capability to transmit. In systems like these, the monitor position is critical for environments where one needs to be aware of certain information or instructions without actively participating in the communication loop. This is common in various military and aviation applications, where it is essential to keep the communication channels clear unless transmission is necessary for operational reasons.