SURVEY WORK
BY MEANS <>K SEAPLANE, /Australian Press Association). (United Service). SYDNEY. Jan. 4. An amphibian seaplane descended in ‘•■vdnev Harbour after many months of interesting survey work in conjunction with 11.M.A.5. Moresby at Great Barrier Reef, Northern Queensland. Flying Officer Crowther, of the Australian Air Force, interviewed, states that hydrographical work has been revolutionised by aircraft, which enables surveys to be made in a fraction of the time hitherto taken by ships. The flying boat rises to a height of 8.003 feet from where photo,, graphs are taken dead vertically, rendering possible to gauge sea depths within a few fathoms as the graduation of shade indicates the depth, light shading indicating shallow water. The survey ship uses these photographs and proceeds to shallow water, takes .soundings and registers the exact depth. Obviously there is no need to visit deep water. A survey in those circumstances has been carried out within a radius of two hundred miles of the base at Bohen.
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Hokitika Guardian, 4 January 1929, Page 5
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162SURVEY WORK Hokitika Guardian, 4 January 1929, Page 5
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