How are normal working conditions restored after radio silence has been imposed?

Correct Answer: Option A — The Rescue Coordination Center (RCC) that imposed the radio silence must transmit a voice message on the Distress frequency stating "SEELONCE FEENEE".

The Rescue Coordination Center (RCC) managing the distress incident is the only authority permitted to terminate radio silence. They must broadcast the voice message 'SEELONCE FEENEE' on the distress frequency, which serves as the internationally recognized signal that the emergency communication period has ended and normal operations may resume.