Referring to the sound-powered telephone circuit shown in illustration, what statement is true concerning the button on the handset as represented by the component labeled "A"? EL-0093

Correct Answer: Option A — The push-button is depressed for the purposes of listening and talking.

Unlike modern push-to-talk commercial radios, marine sound-powered telephone handsets require the user to depress the integrated push-button continuously to engage both the transmission and reception circuits simultaneously, ensuring a clear, bidirectional acoustic pathway is maintained throughout the conversation.