South Passage is a 14 kilometre (9 mi) wide strait that separates the outlying North Island from other islands in the Wallabi Group of the Houtman Abrolhos island chain, in the Indian Ocean off the coast of Western Australia.Australia 1:100000 Topographic Survey, Map sheet 1641 (Edition 1): Wallabi It is nominally located at .Gazetteer of Australia (1996). Belconnen, ACT: Australian Surveying and Land Information Group.
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