North Sydney, New South Wales can be divided into three periods – the first from the original opening in 1886 to 1909, when the McMahons Point line opened. The second period covers the time until the Wynyard line was opened across the Sydney Harbour Bridge in 1932, and the third until construction of the Cahill Expressway on the eastern side of Sydney Harbour Bridge and the wider closure of the system in 1962. The first part of the North Sydney tramway system was a double-track cable tramway which commenced at the original Milsons Point Ferry wharf, located where the north pylon of the Harbour Bridge
Sydney Harbour defences the 1960s, however. While Sydney is no longer protected by fixed defences, a high proportion of the Australian Defence Force is based within the greater Sydney region and could be called on to protect the city during an emergency. During the 2000 Sydney Olympics security for the Harbour was provided by Special Forces, Navy Clearance Divers and warships. Current major ADF facilities in Sydney include: Sydney Harbour defences Sydney Harbour was protected by coastal batteries and other fixed defences from the early 19th century until the 1960s. These defences were constructed to protect the Australian city of Sydney from attack