Geography > Navigation  Directory > Science > Geography > Navigation	en français

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INSIDE YAHOO!       •Yahoo! Reference: World Factbook- Features maps and country profiles including political, geographical, and economic data. CATEGORIES Altimetry@ Business to Business@ Celestial (6) Global Positioning System (GPS) (36) Maps@ Organizations (3) Shopping and Services@ SITE LISTINGS Alphabetical  |  By Popularity    (What's This?) Australian Hydrographic Office - Includes notices to mariners, copyright and licensing details, and general information about hydrography. Degree Confluence Project - Aims to visit each of the latitude and longitude integer degree intersections in the world, and to take at least one picture at each location. Galileo Global Navigational Satellite System - European Space Agency project to launch a series of satellites in order to create a global navigation and positioning system for civil purposes. John Harrison and the Longitude Problem - The story behind the manufacture of John Harrison's marine timekeepers, which allowed early sailors to establish their longitude. Presented by the Royal Observatory in Greenwich. NOVA: Lost at Sea - The Search for Longitude - Companion to the PBS special about the quest for a method of determining a seafaring ship's longitude. Learn why ocean navigation depends on knowing what time it is. U.S. Coast Guard Navigation Center - Provides worldwide users with reliable navigation signals, timely operational status, general navigation, and other information.

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Directory > Science > Geography > Navigation	en français