At 12.09 hours on 23 Oct 1943 the unescorted Campos (Master Mário Amaral Gama) was hit on the starboard side in the bow by one torpedo from U-170 about 5 miles south of the Alcatrazes Island. The ship had been spotted two hours earlier and missed with a spread of two torpedoes at 12.03 hours. The crew of 57 men and six passengers immediately began to abandon ship in four lifeboats, however she was then moving in circles because the engines had not been secured. Two of the lifeboats were smashed by the screw, throwing the occupants into the water and killing seven of them. At 12.33 hours, the still moving Campos was hit on the port side ahead of the bridge by a coup de grâce and sank by the bow in position 24°42S/45°45W. The survivors observed the U-boat surfacing nearby, but they were not questioned by the Germans. One lifeboat made landfall at Santos and the other reached São Sebastião Island. Ten crew members and two passengers were lost.