To transmit over the VHF radio, which action is required?

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Multiple Choice

To transmit over the VHF radio, which action is required?

Explanation:
Keying the radio is done with the push-to-talk control. On the PCL, there’s a UHF/VHF key used to transmit. Pushing it downward completes the transmit circuit, allowing your voice to be sent on the chosen VHF frequency. Holding it down keeps you transmitting, and releasing returns you to receive. The other actions don’t start transmission: turning or pressing the UHF knob on the audio panel affects volume or selection, not the transmit circuit, and selecting COM 1 on the UFCP only changes which radio is active without keying the transmitter.

Keying the radio is done with the push-to-talk control. On the PCL, there’s a UHF/VHF key used to transmit. Pushing it downward completes the transmit circuit, allowing your voice to be sent on the chosen VHF frequency. Holding it down keeps you transmitting, and releasing returns you to receive. The other actions don’t start transmission: turning or pressing the UHF knob on the audio panel affects volume or selection, not the transmit circuit, and selecting COM 1 on the UFCP only changes which radio is active without keying the transmitter.

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