A second target was sighted later that day, and this time the hunting was better. One torpedo broke the back of freighter "Sado Maru" (3,000 tons) off Yokohama, sending it to the bottom in less than three minutes. The subsequent depth charge attack was delivered by three or four patrol vessels (one of the most severe of the war), caused "Thresher" to lose depth control and she plunged to . before control was regained. She then disobeyed orders and remained to assist Halsey.