Cockburn Sound
Encyclopedia
Indian Ocean
The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...
on the coast of Western Australia
Western Australia
Western Australia is a state of Australia, occupying the entire western third of the Australian continent. It is bounded by the Indian Ocean to the north and west, the Great Australian Bight and Indian Ocean to the south, the Northern Territory to the north-east and South Australia to the south-east...
. It extends from the south of the mouth of the Swan River
Swan River (Western Australia)
The Swan River estuary flows through the city of Perth, in the south west of Western Australia. Its lower reaches are relatively wide and deep, with few constrictions, while the upper reaches are usually quite narrow and shallow....
at Fremantle
Fremantle, Western Australia
Fremantle is a city in Western Australia, located at the mouth of the Swan River. Fremantle Harbour serves as the port of Perth, the state capital. Fremantle was the first area settled by the Swan River colonists in 1829...
for about 25 km to Cape Peron near Rockingham
Rockingham, Western Australia
Rockingham is a suburb and primary centre in Western Australia south-west of the Perth city centre and south of Fremantle. It has a beachside location at Mangles Bay, the southern extremity of Cockburn Sound. To its north stretches the maritime and resource-industry installations of Kwinana and...
and is located at 32°10′14"S 115°43′26"E. The total area of the sound is about 100 km².
It is bounded on the east by the mainland and on the west by Garden Island and Carnac Island
Carnac Island
Carnac Island is a 19 ha, A Class, island nature reserve about 10 km south-west of Fremantle in Western Australia.-History:In 1803, French explorer Louis de Freycinet, captain of the Casuarina, named the island Île Pelée . It was also known as Île Lévilian and later Île Berthelot...
, and includes several rocky outcrops and reefs. The Gage Roads
Gage Roads
Gage Roads, is the sea channel in the Indian Ocean offshore from Perth, Western Australia. It was the location of the America's Cup defence in 1986/7, and serves as a shipping lane and anchorage for most sea traffic heading towards the seaport of Fremantle....
shipping channel lies to the north.