Lord Howe boobook than both the New Zealand and Norfolk Island subspecies. The Lord Howe boobook was restricted to Lord Howe Island where it inhabited the native forests as well as occurring around the settlements. Exactly when the Lord Howe boobook became extinct is uncertain. Boobook calls were apparently heard on the island until the 1950s, but during the 1920s boobooks from near Sydney in eastern Australia had been introduced, along with barn owls and masked owls, in an unsuccessful effort to control the black rats that had overrun the island. The rats had been accidentally introduced in June 1918 with the grounding
Australasian Hydrographic Society and gas industries, particularly off the north west coast of Western Australia and coal export facilities in Queensland have required a considerable increase in the provision of accurate and up to date hydrographic information. The attendant increase in trade, for example, has made improved navigation through sensitive area, such as the Great Barrier Reef critical. Hydrography also plays an important role in national security, border protection and humanitarian support. The Australasian Hydrographic Society endeavours to represent all interests in these domains. The Australasian Hydrographic Society consequently "aims to serve anyone with an interest in the science (and art)" of hydrography,