Geomares Publishing has released the website www.electronic-chart.com, which aims to support ship owners, operators and mariners in the transition from paper charts to ECDIS navigation. The content of news updates on developments around ECDIS will be soon extended with photo and video material and interactive tools.
Further the website makes available the book The Electronic Chart, which gives overview on marine electronic charts; all issues from system hardware and software, chart data types and structures, training requirements, safety, legal and economic considerations are covered.
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.
