In the test tank of the Southampton University different companies were showing the smooth operation of their equipment.
'It's always hard to push it in', commented the SeaEye's ROV operator who happened to be demonstrating his device at the moment of Hydro International's visit.
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.
