"Sea Dog" moved ahead of the port column and, at 0726, fired as two cargo ships overlapped in a zig. A minute later, she lost depth control and dropped to . Shortly after 0728, three loud explosions were heard. At 0732, the convoy's escorts began dropping depth charges. At 0745, breaking up noises were heard; and, at 0800, there was a dull, heavy explosion. Converted gun boat "Tomitsu Maru" and collier "Muroto" had been sunk. Depth charging continued for another two hours. In total, Japanese escorts and aircraft fired 109 depth charges at the "Sea Dog", but LtCdr. Lowrance manages to evade the attack.