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Includes notices to mariners, copyright and licensing details, and general information about hydrography.
http://www.hydro.gov.au/
Comprehensive explanation of the art and science of sailing by the stars.
http://www.celestialnavigation.net/
European Space Agency project to launch a series of satellites in order to create a global navigation and positioning system for civil purposes.
http://www.galileo-pgm.org/
A professional society dedicated to the advancement of the art and science of navigation.
http://www.ion.org/
This Institute website is a 'community' site in which every Institute member has a personal page and can contribute to the content of the entire site.
http://www.rin.org.uk/