The hydrographer as the Navy's geospatial specialist also has a warfighting role to present environmental information to the commander providing him with situational awareness. This will allow the military commander maximum freedom of manoeuvre to prosecute his mission. The responsibility of the hydrographer is therefore to cover a survey area so that no feature remains undiscovered. The fundamental difference between a nautical chart product and a map is that the user of the chart is unable to verify the detail that is hidden beneath the sea surface. Hydrographic surveys traditionally result in the nautical chart and include all observations required to ensure safety of navigation. Leeuwin class ships, HMA Ships Leeuwin and Melville have the ability to support a helicopter, and carry three 9 tonne survey motor boats. The nautical charts developed from data gathered by the Hydrographic Service are essential for safe navigation at sea.Īround Australia, less than half of the area has been surveyed to acceptable standards, however the two Leeuwin Class ships, with multi-beam echo sounders, will greatly reduce this figure, making passage of vessels safer and further protect Australia's ocean environment. The RAN has six ships and one aircraft engaged in this paramount and vital task. The RAN Hydrographic Service has responsibility for charting more than one eighth of the world's surface, stretching as far west as Cocos Island in the Indian Ocean, east to the Solomon Islands, and from the Equator to the Antarctic. The Royal Australian Navy currently uses the Leeuwin Class AGS.
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