|Object type||Black & white - Print silver gelatin|
|Place made||Australia: New South Wales, Sydney|
|Date made||c 1942|
The Sydney boom defences, looking from George's Head towards Green Point. The anti-submarine net was designed in January 1942, and its construction began that month. It was located at the narrowest point of the inner harbour entrance, between George's Head, on Middle Head, and Green Point on Inner South Head. The single line steel anti-submarine net was supported between piles. When three Japanese midget submarines attacked Sydney Harbour on the night of 31 May 1942, one of the submarines became entangled in the boom net and was destroyed by the crew.