Determine Longitude

This video demonstrates how to use observations of the sun combined with local and Greenwich time to determine longitude.   An interesting project for anyone interested in  navigation and the geometry of our relationship with the sun.

• #education
• #longitude
• #navigation
• #explorers
• #polaris
• #john_harrison
• #greenwich
• #prime_meridian
• #latitude
• #solar_noon
• #time_zones
• #board_of_longitude
• #dava_sobel
• #true_south