Ships in transit off the coast of Japan should stay a minimum of 50 miles away from the Fukushima power plant, according to an advisory from the U.S. Coast Guard.
Vessels transiting the affected area bound for a U.S. port should notify the captain of the port of the date and time the ship was in the area as part of the ship's 96 hour notice of arrival message, the agency said.
The Maritime Administration sent the same warning to U.S.-flag vessel operators.
The World Meteorological Organization, a United Nations agency, said that northern and eastern Japan will have winter monsoon winds from the northwest and light rain in the sea to the east through midnight Friday, Coordinated Universal Time.
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