NAVTEQ Maps and Traffic
NAVTEQ creates the digital maps and map content that power navigation and location-based services solutions around the world including automotive navigation systems, mobile navigation devices, Internet-based mapping applications, government and business solutions.
http://www.navtech.com/
The Institute of Navigation
Science, Earth Sciences, Geomatics, Navigation - The Institute of Navigation. Meeting programs with abstracts.
https://www.ion.org/
Celestial Navigation Net
Science, Earth Sciences, Geomatics, Navigation - Celestial Navigation Net. Annotated hub site of resources relating to navigating by the stars, including theory, practice, history, instruments, and classroom links.
https://www.celestialnavigation.net/