On her ninth patrol, from 29 May to 11 June, she carried ammunition, oil, and dry stores to Philippine guerrillas under Colonel R.V. Bowler on Mindanao. Between 12 June and 27 June, she transported a similar cargo to Negros Island and embarked evacuees, including one German POW, for Darwin. During her 11th patrol, from 30 June to 27 July, she landed a reconnaissance party and 12 tons of stores on North Pandan Island, and more supplies to Colonel Kangleon on Leyte and Colonel Abcede on Mindanao. On her 12th, 13th and 14th patrols, she returned to the central Philippines, landed personnel and supplies at various points on Mindanao and Luzon, and carried evacuees to Australia. On 25 September, during the first of these three patrols, she grounded on Iuisan Shoal. Forced to lighten her load, her evacuees, mail, captured documents, and cargo were sent ashore. All secret materials were burned. Her reserve fuel tanks were blown dry, variable ballast was blown overboard and six-inch (152 mm) ammunition jettisoned. With the blowing of her main ballast tanks she was finally able to get off the reef within three and a half hours, despite the receding tide, and clear the area by dawn.