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Flash and sound ranging survey as practiced by Charles Wilkes Picture

Flash and sound ranging survey as practiced by Charles Wilkes

Flash and sound ranging survey as practiced by Charles Wilkes. Shoot cannon - see flash - measure time till hear sound - determine distance

Photo Category: Navigation - Astronomic - Sextant
Photo Location: South Pacific atoll
Photo Date: 1839

Author: In: The Magnificent Voyagers/ NOAA

License: Public Domain Mark 1.0 (Public domain)
473 x 640 50.90 KB
1072 x 1452 302.73 KB
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Added On
18th October 2015
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