The following is a marine accident summary from the National Transportation Safety Board (NTSB):
(WASHINGTON) — On March 2, 2015, at 1027 local time, the passenger vessel Diamond Edge and the liftboat-configured offshore supply vessel B.W. Haley collided while underway in dense fog about 55 miles south-southwest of Lafayette, La. As a result of the collision, the hull of Diamond Edge was breached and the vessel partially sank. There were no significant injuries or pollution reported. Estimated damage exceeded $1.75 million for both vessels combined.
Probable cause
The National Transportation Safety Board determines that the probable cause of the collision between B.W. Haley and Diamond Edge was the failure of both operators to properly determine the risk of collision and the excessive speed of Diamond Edge in restricted visibility.
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