Breakwater Battery
Encyclopedia
Breakwater Battery, was a coastal defence battery at Port Kembla, Australia
Australia
Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

 during World War II
World War II
World War II, or the Second World War , was a global conflict lasting from 1939 to 1945, involving most of the world's nations—including all of the great powers—eventually forming two opposing military alliances: the Allies and the Axis...

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Constructed in 1939 to provide protection for Port Kembla from enemy shipping and submarines. Two 6 inch Mk XI gun
BL 6 inch Mk XI naval gun
The BL 6 inch Gun Mark XI was a British 50 calibres high-velocity naval gun which was mounted as primary armament on cruisers and secondary armament on pre-dreadnought battleships.-History:...

 emplacements with related underground facilities were constructed near the southern breakwater at Port Kembla.

The battery and observation post (now a military museum) were key structures of the command centre for Fortress Kembla during World War II.
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