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![An early published diagram of the principle of echo-sounding ship3203.jpg An early published diagram of the principle of echo-sounding](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship3203.jpg?itok=jT6SVV5k)
Description
An early published diagram of the principle of echo-sounding. Published inSpecial Publication No. 3 of the International Hydrographic Bureau, October 1924. This is among the earliest of published diagrams of the echo-soundingprinciple. (Image credit: Archival Photography by Steve Nicklas)
Photographer
Archival Photography by Steve Nicklas
Collection
Voyage to Inner Space
NOAA Affiliation
NOS