Axis naval activity in Australian waters

During 1942 and 1943, Japanese submarines periodically operated in the waters surrounding Australia. A force of midget submarines raided Sydney Harbour on the night of 31 May – 1 June 1942 and attacks on merchant shipping travelling off the east coast began several days later.[1] These attacks continued until August 1942, when the Japanese submarine force was redeployed.[2] The Kaidai class submarine I-174 made a 24-day patrol off Australia in July and August 1942, but did not attack any ships.[3] In response to the Japanese attacks, the Australian naval authorities ordered that all ships with a displacement of more than 1,200 tons and a maximum speed of less than 12 knots travel in escorted convoys from 8 June.[4] These convoys were successful in minimising losses, and no escorted ships were sunk off Australia during 1942.[5]





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