Two Japanese midget submarines entered Sydney Harbor in Australia in the final hours of the previous day. One of them, M-24, was able to fired two torpedoes at cruiser USS Chicago just after 0000 hours; missing the American cruiser, one of the torpedoes hit the breakwater, sinking nearby barracks ship HMAS Kuttabul (21 were killed, 10 were wounded). M-24 would be able to escape the harbor; her crew abandoned the midget submarine 13 miles north of Sydney but was never seen again. The other midget submarine was depth charged and destroyed by Australian auxiliary patrol boats HMAS Steady Hour, HMAS Sea Mist, and HMAS Yarroma at 0500 hours, killing both men aboard.
