"Wahoo" cleared the area to the northeast in order to patrol the Tokyo-Paramushiro route; on 12 May, she sighted two freighters. She dove to gain position for a "two ship" shot where they would come by in column. She launched four torpedoes from , but got only one hit. Morton fired his last two torpedoes. Nothing was seen of the first. The second hit under the bridge with a dull thud, much louder than the duds heard only on sonar but lacking the "whacking" noise which accompanies a wholehearted explosion. The other freighter opened fire with their deck guns and charged "Wahoo". Both ships got away. "Wahoo" cleared the area to the east and set course for Pearl Harbor.