Sydney Harbour anti-submarine boom netSydney Harbour anti-submarine boom net

The Sydney Harbour anti-submarine boom net was an anti-torpedo and anti-submarine net that was installed in Sydney Harbour during World War II. It spanned the entire width of the harbour from Laing Point in Watsons Bay to Georges Head Battery, on the Lower North Shore. The boom formed part of the broader Sydney Harbour coastal defences, which also included artillery batteries and patrol boats.