Aircraft Directory, Aviation Weather, Aerial Advertising, Airlines, Air Cargo Services- Navigation Systemshttp://www.advancesky.com//navigation-systems/Site description Maptech http://www.maptech.com/Marine navigation software and NOAA nautical charts, land navigation software with GPS interface, USGS electronic topographic maps, and aeronautical sectionals.Fri, 10 Sep 2010 21:32:43 GMTJeppesen http://www.jeppesen.com/Air navigation charts, flight planning and aviation weather services, maintenance information, and pilot training systems and supplies.Fri, 10 Sep 2010 21:32:43 GMTNAV Canada http://www.navcanada.ca/Nonprofit company providing air navigation services, including air traffic control, flight information, airport advisory services, and more.Fri, 10 Sep 2010 21:32:43 GMTAeroPlanner.com http://www.aeroplanner.com/Provides planning tools and data for pilots.Fri, 10 Sep 2010 21:32:43 GMTAirways Corporation of New Zealand http://www.airways.co.nz/Operates air traffic control towers and radar centres. Maintains ground equipment and satellite-based oceanic systems.Fri, 10 Sep 2010 21:32:43 GMT