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NOAA Photo Library Image - theb2703

Diagram of possible sound wave paths in water. Wave-path O-C-E came close to describing refractive path of sound in SOFAR layer . Sound path model developed in 1930's for radio acoustic ranging work. Didn't yet understand the channeling effect of the velocity minimum. Furthest RAR use was out to 206 miles offshore in 1925

Image ID: theb2703, Voyage To Inner Space - Exploring the Seas With NOAA Collect
Photo Date: 1934
Credit: Association of Commissioned Officers

Category: Oceanography/Pre-1950/Physical/

High Resolution Photo Available

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Last Updated:
November 10, 2017