. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. 22 SHOR [chap, 2 - 200 300 Frequency in sec' lb' 400 500 Fig. 1. Low-frequency part of the Fourier energy spectiuui of an explosion at 500-ft depth. (After Raitt, 1952.) slowly moving ship can reach a safe distance away. The damaging effects are accentuated in shallow w^ater, and the larger charges must often be fired at greater depths than is desirable. At ranges short of that at which the first refracted wave is detected, a series of small charges is frequently fired to get a w'ide-angle re
. The Earth beneath the sea : History. Ocean bottom; Marine geophysics. 22 SHOR [chap, 2 - 200 300 Frequency in sec' lb' 400 500 Fig. 1. Low-frequency part of the Fourier energy spectiuui of an explosion at 500-ft depth. (After Raitt, 1952.) slowly moving ship can reach a safe distance away. The damaging effects are accentuated in shallow w^ater, and the larger charges must often be fired at greater depths than is desirable. At ranges short of that at which the first refracted wave is detected, a series of small charges is frequently fired to get a w'ide-angle reflection profile; in this case the amount of energy is usually more than adequate, even with quite small charges, and efficiency is sacrificed so as to obtain a less complex arrival by firing the charges so near the surface that. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hill, M. N. (Maurice Neville), 1919-. New York : Interscience Pub.
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Keywords: ., bookcentury1900, bookcollectionbiodivers, booksubjectoceanbottom
