The Port Hedland Port Authority has awarded UTEC Survey Australia a contract to provide bathymetric survey services to the Port Authority's channel and harbour capital dredging campaign. The survey work is being carried out offshore Port Hedland in North West Australia.
UTEC Survey is to supply pre-dredge, progress, clearance surveys and final charting services. UTEC Survey is using a high-resolution Reson 8125 coupled with a PosMV installed onboard the vessel No Limit to meet the stringent requirements of IHO Special Order for Class-A Dynamic Under Keel Clearance surveys (DUKC). Offshore operations began in March 2010 and are expected to run through April.
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.
