What is the range of the lights fitted to lifejackets and liferafts, as seen on a dark night, with a clear atmosphere?

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Asked on July 2, 2021
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Lifejacket lights in these conditions should be detected at about 1 nautical mile. Liferafts being positioned at an increased height above sea level would be detected at about 2 nautical miles.

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Posted by marinetales
Answered on July 2, 2021