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![A submarine bell-buoy equipped for underwater signaling ready for installationoff South Africa ship3236.jpg A submarine bell-buoy equipped for underwater signaling ready for installationoff South Africa](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_ship3236.jpg?itok=-WZ4yRz7)
Description
A submarine bell-buoy equipped for underwater signaling ready for installationoff South Africa. In Submarine Signaling, Scientific AmericanSupplement, No. 2071, pp. 168-170, Sept. 11, 1915.
Collection
Voyage to Inner Space