Sonar Probing in Narragansett Bay

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Science  11 Dec 1964:
Vol. 146, Issue 3650, pp. 1459-1460
DOI: 10.1126/science.146.3650.1459


A 12-kilocycle pulsed transducer, with a 0.1 millisecond duration, is used for tracing a sub-bottom rock profile in Narragansett Bay. The short sonar pulse of high energy is produced by a capacitor discharge. Over-the-side installation of the transducer permits the use of any boat or ship for the survey work. Coherent presentation of the data on a wet paper recorder gives an instantaneous visual record. A cross a north-south rock formation, a recurring rise and fall of the rock is shown throughout the sedimentary deposit.