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![Flash and sound ranging survey as practiced by Charles Wilkes theb2183.jpg Flash and sound ranging survey as practiced by Charles Wilkes](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_theb2183.jpg?itok=XGYZxt-i)
Description
Flash and sound ranging survey as practiced by Charles Wilkes.Shoot cannon - see flash - measure time till hear sound - determine distance
Display Date
1839
Location
South Pacific atoll
Collection
Historic Coast & Geodetic Survey