The next day, "Wahoo" changed course for Palau. On 26 January, the submarine sighted the smoke of two ships. "Wahoo" obtained a position, launched two torpedoes at the leading ship and, 17 seconds later, two at the second ship. The first two torpedoes hit the "Fukuei Maru". The third passed ahead of the second freighter, the fourth hit. Upon observing the damage, "Wahoo" discovered there were two more ships; a huge transport, "Buyo Maru", and a tanker. "Fukuei Maru" was listing badly to starboard and sinking by the stern; the second ship was headed directly for "Wahoo", at a slow speed. Ignoring this, "Wahoo" fired a three-torpedo spread at the transport; the second and third hit and stopped her.