Operation Ten-Go
Unfortunately for the Japanese, the Allies had intercepted and decoded their radio transmissions, learning the particulars of Operation Ten-Go. Further confirmation of Japanese intentions came around 20:00 when the Surface Special Attack Force, navigating the Bungo Strait, was spotted by the American submarines and . Both reported "Yamato"s position to the main American carrier strike force, but neither could attack because of the speed of the Japanese ships——and their extreme zigzagging.