C-Nav is now providing a second high-accuracy DGPS (dGNSS) service. C-Nav Net-1 was the first worldwide Precise Point Positioning (P3) service. Now C-Nav Net-2 provides the same level of service with extreme redundancy built into its network.
An independent position calculated from C-Nav Net-2 is just as accurate and stable as everyone has come to expect for C-Nav Net-1. When Net-1 & Net-2 are used together, all single points of failure are eliminated which doubles the users confidence without doubling the cost.
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.
