Four torpedoes struck "Shinano", at an average depth of . The first hit towards the stern, flooding refrigerated storage compartments and one of the empty aviation gasoline storage tanks, and killing many of the sleeping engineering personnel in the compartments above. The second hit the compartment where the starboard outboard propeller shaft entered the hull and flooded the outboard engine room. The third hit further forward, flooding the No. 3 boiler room and killing every man on watch. Structural failures caused the two adjacent boiler rooms to flood as well. The fourth flooded the starboard air compressor room, adjacent anti-aircraft gun magazines, and the No. 2 damage control station, and ruptured the adjacent oil tank.