Explanation: Distress communications hold absolute and paramount priority over all other radio transmissions. This is a fundamental principle in international and national radio regulations (like FCC Part 80 for maritime and Part 87 for aviation), ensuring that stations experiencing a grave and imminent threat to life or property can transmit their messages without delay. In such life-threatening situations, a ship or aircraft station may take any available means to transmit its distress message, including overriding other ongoing communications if necessary. Therefore, a ship or aircraft station may interfere with a public coast station specifically and only in cases of distress. Other situations, such as government priority traffic or general safety messages (e.g., concerning navigation or weather), do not override the prohibition against interference with ongoing radiocommunications in the same absolute way that a distress condition does.