Which indicator shows the radio is receiving a message and the strength of the incoming signal?

The RX/TX Power Indicator is the correct choice because it measures both the receive (RX) and transmit (TX) power levels of the radio. When the radio is receiving a message, this indicator provides crucial information about the strength of the incoming signal. A strong signal typically results in clearer audio and better overall communication, allowing the operator to gauge the quality of the incoming message.

This indicator is essential for maintaining effective radio communication, as it directly influences the ability to receive incoming messages clearly. If the RX power level is low, the operator may experience interference or difficulty understanding the transmission, which could adversely affect mission operations. Understanding this indicator helps ensure that the radio is functioning optimally and that effective communication can be achieved during tactical operations.