On the afternoon of 1 November, "Ray" closed a five-ship convoy, sinking the cargo ship Horai Maru No. 7, and damaging a small tanker. Escaping the escorts, she landed men and supplies on the west coast of Mindoro, Philippines, picking up two downed Navy fliers, two Army POW's escaped from Corregidor, and an escaped Filipino political prisoner. On the night of 4 November, the sub sighted a cargo ship with its superstructure aflame, from an earlier attack by . She launched two torpedoes, scoring a hit amidships and blowing away the bow of the "Kagu Maru".