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Updated with video | 12 p.m. A Japanese ghost ship remains adrift some 180 miles west of the U.S. border, and the Coast Guard says it’s a potential hazard to navigation.

The ship, the RYOU-UN MARU, is a hazard because it is in busy shipping lanes west of what’s call the Dixon Entrance southeast of Alaska.

The unmanned ship was first seen by the Canadian Coast Guard in Canadian water more than a week ago. It came into U.S. water on Saturday, according to the U.S. Coast Guard.

The “derelict” vessel has been adrift at sea, presumably since the 2011 Japanese earthquake and tsunami more than a year ago.

The Coast Guard flew over the ship most recently on Monday and dropped a data marker buoy near the vessel to provide updates of the vessels location.

The Coast Guard says it doesn’t know what pollution issues there may be regarding the ship, but concerns are limited because the ship has been at sea for such a long time.

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