Ehime Maru and USS Greeneville collision

On 9 February 2001, about nine nautical miles south of Oahu, Hawaii in the Pacific Ocean, the United States Navy (USN)  Los Angeles-class submarine USS Greeneville (SSN-772) collided with the Japanese-fishery high-school training ship Ehime Maru (えひめ丸) from Ehime Prefecture. In a demonstration for some VIP civilian visitors, Greeneville performed an emergency ballast blow surfacing maneuver. As the submarine shot to the surface, she struck Ehime Maru. Within 10 minutes of the collision, Ehime Maru sank. Nine of the thirty-five people on board were killed: four high-school students, two teachers, and three crew members.


On 9 February 2001, about nine nautical miles south of Oahu, Hawaii in the Pacific Ocean, the United States Navy (USN) Los Angeles-class submarine USS Greeneville (SSN-772) collided with the Japanese-fishery high-school training ship Ehime Maru (えひめ丸) from Ehime Prefecture. In a demonstration for some VIP civilian visitors, Greeneville performed an emergency ballast blow surfacing maneuver. As the submarine shot to the surface, she struck Ehime Maru. Within 10 minutes of the collision, Ehime Maru sank. Nine of the thirty-five people on board were killed: four high-school students, two teachers, and three crew members.
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