Cmdr. Scott Waddle, former captain of the U.S. submarine that hit and sank a Japanese fisheries training ship off Hawaii in February, has received a letter of reprimand that will effectively end his navy career, the U.S. Navy said Monday.

Nine Japanese from the Ehime Maru were lost at sea.

Adm. Thomas Fargo, commander in chief of the U.S. Pacific Fleet, said at a news conference at Pearl Harbor that the navy imposed the nonjudicial punishment on Waddle, who was relieved of command of the submarine after the collision.

The "admiral's mast" punishment included a letter of reprimand to be placed in Waddle's military record, forfeiture of half a month's pay for two months and formal dismissal as captain of the USS Greeneville.