When a vessel, installation, or aircraft is in distress, if it fails to, as in violation of Article 34 of the Maritime Traffic Safety Law.

违反《海上交通安全法》第三十四条规定，船舶、设施或飞机遇难时。

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Another is to ensure that there are clear guidelines on what constitutes a distress signal and a vessel in distress.

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The Seahouses Lifeboat Station received a distress call from the cargo vessel Danio in the early hours of Saturday.

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The three fishermen's vessel didn't have an Emergency Position Indicating Radio Beacon, which transmits a distress signal anywhere in the world through a satellite system, the navy said.

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