UTEC Survey Australia Pty. Ltd. (Perth) is completing a five-month bathymetric survey campaign for the Port Hedland Port Authority's channel and harbour capital dredging campaign. The hydrographic survey work, which is expected to be finalised by mid-July, is being carried out offshore Port Hedland in North West Australia using the dedicated 21-metre 'No Limit' survey vessel .
The "No Limit" is fitted with a high resolution Reson 8125 multibeam, navigation, acquisition, hydrographic personnel and full charting systems. The vessel also has towed side-scan sonar and reflection seismic capabilities.
The vessel will be available in late July to undertake hydrographic and geophysical work in northwest Australia.
Members of the US Geological Survey were filmed while out on the Missouri River at Williston, North Dakota, USA, performing a hydrographic survey to monitor the state of riverbed erosion. They were using a multibeam echo sounder which transmits sound energy and analyses the return signal (echo) that has bounced off the riverbed or other objects. Multibeam sonars emit sound waves from directly beneath a ship's hull to produce fan-shaped coverage of the riverbed.
