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JohnBaker3 · 19 August 2014, 05:04 AM

Hey Guys:

Prior to the invention of GPS in 1995, maritime positioning was based on celestial navigation and piloting.

Without an accurate knowledge of GMT, it was impossible to know your true position at sea.

This link is to an episode of NOVA titled "The Search for Longitude"; it runs about 1 hour in length, but well worth the effort.

John Harrison should be one of our heros in the pursuit of accurate time keeping, and its history.

Enjoy.

http://www.youtube.com/watch?v=NENPdT4LASw

19 August 2014, 05:04 AM	#1
JohnBaker3 2024 Pledge Member Join Date: Feb 2014 Real Name: John Baker III Location: Spring,Texas Watch: 1971 Red Sub Posts: 2,222	John Harrison's H4 Watch and The Search for Longitude Hey Guys: Prior to the invention of GPS in 1995, maritime positioning was based on celestial navigation and piloting. Without an accurate knowledge of GMT, it was impossible to know your true position at sea. This link is to an episode of NOVA titled "The Search for Longitude"; it runs about 1 hour in length, but well worth the effort. John Harrison should be one of our heros in the pursuit of accurate time keeping, and its history. Enjoy. http://www.youtube.com/watch?v=NENPdT4LASw __________________ As I've grown older, I've learned that pleasing everyone is impossible, but pissing off everyone is a piece of cake.

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